NES 830 Part 1Requirements for Gunmetal Ingots and Castings - Category 3

Requirements for Gunmetal Ingots andCastings

Part 1

Gunmetal Ingots and Class 3 GunmetalSand Castings

Ministry of Defence Defence Standard 02-830 Part 1

Issue 2 Publication Date 10 August 2002

Category 3

AMENDMENTS ISSUED SINCE PUBLICATION

AMD NO DATE OFISSUE

TEXT AFFECTED SIGNATURE &DATE

Revision Note

This Issue of this Standard has been prepared to incorporate changes to text and presentation.The technical content has been updated in line with current practice.

Historical Record

NES 830 Pt 1 Issue 1 Nov 88NES 830 Pt 1 Issue 2 Sep 94Def Stan 02-830 Pt 1 Issue 1 Apr 00

1DEFENCE STANDARD 02830

REQUIREMENTS FOR GUNMETAL INGOTS AND CASTINGS

PART 1 ISSUE 2

GUNMETAL INGOTS AND CLASS 3 GUNMETAL SAND

CASTINGS

This Defence Standard is

authorized for use in MOD contracts

by the Defence Procurement Agency and

the Defence Logistics Organization

Published by:

Defence Procurement Agency,An Executive Agency of The Ministry of Defence,UK Defence Standardization,Kentigern House,65 Brown Street,Glasgow, G2 8EX.

DEF STAN 02830 PART 1 / ISSUE 2(NES 830)

2

SCOPE

1. Part 1 of this Defence Standard defines the requirements for the manufacture, inspection andtesting of Gunmetal Ingots and Class III Gunmetal Sand Castings.


3

FOREWORDSponsorship

1. This Defence Standard (DEF STAN) is sponsored by the Defence Procurement Agency (DPA),Ministry of Defence (MOD).

2. The complete Defence Standard comprises:

Requirements for Gunmetal Ingots and Castings

Part 1: Gunmetal Ingots and Class 3 Gunmetal Sand Castings

Part 2: Continuously Cast

3. Any user of this Standard either within MOD or in industry may propose an amendment toit. Proposals for amendments that are not directly applicable to a particular contract shall bemade to the publishing authority identified on Page (i), and those directly applicable to aparticular contract shall be dealt with using contract procedures.

4. If it is found to be unsuitable for any particular requirement MOD shall be informed in writingof the circumstances.

5. No alteration shall be made to this Standard except by the issue of an authorized amendment.

6. Unless otherwise stated, reference in this Standard to approval, approved, authorized andsimilar terms, means by the MOD in writing.

7. Any significant amendments that may be made to this Standard at a later date will be indicatedby a vertical sideline. Deletions will be indicated by 000 appearing at the end of the lineinterval.

8. This Standard has been reissued to reflect changes in Departmental Nomenclature due to theMOD reorganization and the changes to technical requirements.

Conditions of ReleaseGeneral

9. This Standard) has been devised solely for the use of the MOD, and its contractors in theexecution of contracts for the MOD. To the extent permitted by law, the MOD hereby excludesall liability whatsoever and howsoever arising (including but without limitation, liabilityresulting from negligence) for any loss or damage however caused when the Standard is usedfor any other purpose.

10. This document is Crown Copyright and the information herein may be subject to Crown orthird party rights. It shall not be released, reproduced or published without writtenpermission of the MOD

11. The Crown reserves the right to amend or modify the contents of this Standard withoutconsulting or informing any holder.

MOD Tender or Contract Process

12. This Standard is the property of the Crown. Unless otherwise authorized in writing by theMOD shall be returned on completion of the contract, or submission of the tender, inconnection with which it is issued.

13. When this Standard is used in connection with a MOD tender or contract, the user shall ensurethat he is in possession of the appropriate version of each document, including relateddocuments, relevant to each particular tender or contract. Enquiries in this connection maybe made to the authority named in the tender or contract.


4

14. When Defence Standards are incorporated into MOD contracts, users are responsible for theircorrect application and for complying with contractual and other statutory requirements.Compliance with a Defence Standard does not of itself confer immunity from legal obligations.

Categories of Standard

15. The Category of this Standard has been determined using the following criteria:

a. Category 1. If not applied may have a Critical affect on the following:Safety of the vessel, its complement or third parties.Operational performance of the vessel, its systems or equipment.

a. Category 2. If not applied may have a Significant affect on the following:Safety of the vessel, its complement or third parties.Operational performance of the vessel, its systems or equipment.Through life costs and support.

b. Category 3. If not applied may have a Minor affect on the following:MOD best practice and fleet commonality.Corporate experience and knowledge.Current support practice.

Related Documents

16. In the tender and procurement processes the related documents listed in each section andAnnex A can be obtained as follows:

a. British Standards British Standards Institution,389 Chiswick High Road,London, W4 4AL

a. Defence Standards Defence Procurement Agency,An Executive Agency of The Ministry of Defence,UK Defence Standardization,Kentigern House, 65 Brown Street, Glasgow, G2 8EX.

b. Other documents Tender or Contract Sponsor to advise.

17. All applications to the MOD for related documents shall quote the relevant MOD Invitationto Tender or Contract number and date, together with the sponsoring Directorate and theTender or Contract Sponsor.

18. Prime Contractors shall be responsible for supplying their subcontractors with relevantdocumentation, including specifications, standards and drawings.

Health and SafetyWarning

19. This Defence Standard may call for the use of processes, substances and/or procedures thatare injurious to health if adequate precautions are not taken. It refers only to technicalsuitability and in no way absolves either the supplier or the user from statutory obligationsrelating to health and safety at any stage of manufacture or use. Where attention is drawnto hazards, those quoted may not necessarily be exhaustive.

20. This Defence Standard has been written and shall be used taking into account the policystipulated in JSP 430: MOD Ship Safety Management System Handbook.

Additional Information

21. (There is no relevant information included.)


5

CONTENTSPage No

TITLE PAGE 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SCOPE 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FOREWORD 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Sponsorship 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Conditions of Release 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Categories of Standard 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Related Documents 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Health and Safety 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Additional Information 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . CONTENTS 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 1. PERFORMANCE SPECIFICATION 7. . . . . . . . . . . 1.1 Physical Characteristics 7. . . . . . . . . . . . . . . . . . . . . . . 1.1.1 Ingots 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 1.1 IngotsChemical Composition 7. . . . . . . . . . . . . . . . 1.1.2 Castings 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 1.2 CastingsChemical Composition 8. . . . . . . . . . . . . . 1.1.3 Density 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2 Mechanical Properties 8. . . . . . . . . . . . . . . . . . . . . . . . 1.3 Classification 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 1.3 Mechanical Properties 9. . . . . . . . . . . . . . . . . . . . . . . . 1.4 Test Methods 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4.1 Destructive Tests 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4.1.1 Chemical Analysis of Ingots 9. . . . . . . . . . . . . . . . . . . 1.4.1.2 Chemical Analysis of Castings 9. . . . . . . . . . . . . . . . . 1.4.1.3 Mechanical Tests (Ingots) 9. . . . . . . . . . . . . . . . . . . . . 1.4.1.4 Mechanical Tests (Castings) 9. . . . . . . . . . . . . . . . . . . 1.4.1.5 Retests 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4.2 Non-Destructive Tests 9. . . . . . . . . . . . . . . . . . . . . . . . 1.4.2.1 Dimensional Check 10. . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4.2.2 Visual-Optical 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4.2.3 Pressure Tests 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 1.4 Test Duration 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5 Defects and Rectification of Defects 10. . . . . . . . . . . . . 1.5.1 Rectification of Defects 10. . . . . . . . . . . . . . . . . . . . . . . 1.5.2 Rectification of Surface Defects by Blending 10. . . . . 1.5.3 Impregnation 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 2. NATIONAL/INTERNATIONAL REGULATIONS 11

SECTION 3. MILITARY STANDARDS/REQUIREMENTS 11. . . . 3.1 Acceptance Standards 11. . . . . . . . . . . . . . . . . . . . . . . .


6

Page No3.1.1 Destructive Examination Standards 11. . . . . . . . . . . . . 3.1.1.1 Analysis 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.1.1.2 Mechanical Tests 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.1.1.3 Retests 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.1.2 Non-destructive Examination Standards 11. . . . . . . . . 3.1.2.1 Visual-Optical 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.1.2.2 Pressure Tests 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.1.2.3 Defects 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.2 Quality Assurance Documentation 11. . . . . . . . . . . . . . 3.3 Identification of Ingots and Castings 11. . . . . . . . . . . . 3.3.1 Castings 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.4 Packaging 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 4. DESIGN REQUIREMENTS/GUIDANCE 12. . . . . . .

SECTION 5. CORPORATE EXPERIENCE & KNOWLEDGE 12. 5.1 History 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.2 Typical Uses 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3 Joining Methods 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.4 Remarks 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ANNEX A RELATED DOCUMENTS 14. . . . . . . . . . . . . . . . . . . .

ANNEX B DEFINITIONS 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ANNEX C PROCUREMENT CHECK LIST 16. . . . . . . . . . . . . . .

ALPHABETICAL INDEX 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .


7

1. PERFORMANCE SPECIFICATIONRelated Documents: BS EN 1982; BS EN 100021; DEF STAN 031; DEF STAN02771; DEF STAN 02863.

1.1 Physical Characteristics

1.1.1 Ingots

a. For casting stock, ingots shall be cast from virgin metal and/or from segregatedand identified scrap. No additions shall be made to the melt after the finalanalytical sample has been taken for crucible melts. If continuous melting isemployed, the melt shall be analysed at fixed intervals during the melt to ensurethat the correct chemical composition is maintained. The ingots as cast shallbe clean and free from surface gas porosity.

b. The chemical composition for ingots is given in Table 1.1.

ElementPer Cent by Weight

ElementNot Less Than Not More Than

Tin 6.0 8.0*

Zinc 1.7 3.2

Lead 2.7 3.5

Nickel - 2.0*

Copper Remainder

ImpuritiesIron - 0.20

Aluminium - 0.01

Silicon - 0.01

Bismuth - 0.05

Arsenic - 0.15

Antimony - 0.25

Iron and Arsenic andAntimony

- 0.40

Total - 0.70

Table 1.1 IngotsChemical Composition

* Tin + Nickel content shall not be less than 7% and not greater than 8%


8

1.1.2 Castings

a. Castings shall be made from either a virgin mix or ingots and approved scrapin accordance with the definition given in Annex B. No other scrap is permitted.Virgin metal may be added as necessary to enable the correct chemicalcomposition to be achieved. No further additions shall be made to the melt afterthe final analytical sample has been taken prior to pouring into the mould.

b. The chemical composition for castings is given in Table 1.2.

c. Castings produced to this Standard shall not be used in systems where thetemperature will exceed 230C as the creep strength reduces above thistemperature.

ElementPer Cent By Weight

ElementNot Less Than Not More Than

Tin 6.0 8.0*

Zinc 1.5 3.0

Lead 2.5 3.0

Nickel - 2.0*

Copper Remainder

ImpuritiesIron - 0.20

Aluminium - 0.01

Silicon - 0.02

Bismuth - 0.05

Arsenic - 0.15

Antimony - 0.25

Iron and Arsenic andAntimony

- 0.40

Total - 0.70

Table 1.2 CastingsChemical Composition

* Tin + Nickel content shall not be less than 7% and not greater than 8%

1.1.3 Density

a. In the absence of details of maximum density a figure of 8920 kg/m3 shall beassumed.

1.2 Mechanical Properties

a. The mechanical properties from test pieces at room temperature as specified inClause 1.4.1.3a. shall be as detailed in Table 1.3.

NOTE Gunmetal has a long freezing range which can result in dispersed porositywhich lowers its resistance to shock loading.


9

1.3 Classification

a. The classification of Class III castings is defined in DEF STAN 02-863.

NOTE Where it is necessary to specify a class of casting other than Class III, theacceptance criterion shall be agreed between the Project Manager and thecontractor and the requirements specified in the contract.

Tensile Strength(N/mm2)

0.2% Proof Stress(N/mm2)

Elongation On 5.65Gauge Length (%)

So

250 130 16

Table 1.3 Mechanical Properties

1.4 Test Methods

1.4.1 Destructive Tests

1.4.1.1 Chemical Analysis of Ingots

a. A full chemical analysis shall be taken from each cast for noncontinuousmelting. For continuous melting an analysis shall be made every 250 kg or atleast once per production day.

1.4.1.2 Chemical Analysis of Castings

a. In addition to the normal melt control analysis a full chemical analysis shall bemade from a sample piece taken from each casting.

1.4.1.3 Mechanical Tests (Ingots)a. Tensile tests in accordance with BS EN 10002-1 shall be made from test bars

cast in accordance with BS EN 1982 8.2.2 from the same melt as the ingotrepresents. Three tensile test specimens are advised to enable retests in theevent of failure of the initial specimen.

1.4.1.4 Mechanical Tests (Castings)a. Tensile tests in accordance with BS EN 10002-1 shall be made from test bars

cast in accordance with BS EN 1982 8.2.2. Three tensile test specimens areadvised, to enable retests to be made in the event of failure of the initialspecimen. Tensile tests shall be carried out as follows:

(1) one set of test bars for each cast of 750 kg or more;

(2) for casts of less than 750 kg separately cast test bars will be required foreach days production with a minimum of one set of test bars for each750kg of metal melted.

1.4.1.5 Retests

a. Should any of the original test specimens fail to meet acceptance standards, twofurther specimens from the same cast may be broken in accordance withBS EN 10002-1.

1.4.2 Non-Destructive Tests

NOTE The whole of a Class III casting is considered a nondesignated area.


10

1.4.2.1 Dimensional Check

a. All castings shall be fully dimensionally checked, to ensure that they complywith DEF STAN 02-863.

1.4.2.2 Visual-Optical

a. All castings shall be 100% visually inspected, assisted where necessary, by theuse of x5 magnification optics. All imperfections shall be identified andrecorded.

1.4.2.3 Pressure Tests

a. Castings shall be subjected to the specified water pressure test which is to bemaintained for at least the duration given in Table 1.4.

Nominal Size (mm)Duration (Seconds)

From ToDuration (Seconds)

- 50 15

50 150 60

150 300 120

300 - (Body 300

(Seat 120

Table 1.4 Test Duration

1.5 Defects and Rectification of Defects

1.5.1 Rectification of Defects

a. Class III castings may be welded by the TIG or MIG process using any fillermaterial agreed by the Design Authority. The welding shall be in accordancewith DEF STAN 02-771 and shall be restricted to defects not exceeding 5mmdeep.

1.5.2 Rectification of Surface Defects by Blending

a. Unacceptable surface defects may be blended out by an approved process,providing the resulting depression does not reduce the contract drawing sectionthickness by more than 5 mm for section thickness over 50 mm, or 10% ofsection thicknesses up to and including 50 mm. The depression sides and endsshall be smoothly blended out by a minimum radius of three times themaximum depth of blending and the edge formed with the surface is also to befaired smooth. The total area subjected to blending, including the area affectedby the fairing, is not to exceed 20% of any nondesignated region.

NOTE Blending out of surface defects is preferable to weld repair wheneverpossible.

1.5.3 Impregnation

a. Impregnation is a recognized recovery procedure for Class III castings inaccordance with DEF STAN 03-1. Pressure Tests shall be carried out on theimpregnated casting in accordance with Clause 1.4.2.3a.


11

2. NATIONAL/INTERNATIONAL REGULATIONS(No relevant information included)

3. MILITARY STANDARDS/REQUIREMENTS3.1 Acceptance Standards

3.1.1 Destructive Examination Standards

3.1.1.1 Analysis

a. Each chemical analysis shall conform to:

(1) Table 1.1Ingots

(2) Table 1.2Castings

3.1.1.2 Mechanical Tests

a. Each tensile test result shall conform to Table 1.3 of this Standard.

3.1.1.3 Retests

a. Both tensile tests results shall conform to Table 1.3 of this Standard.

3.1.2 Non-destructive Examination Standards

3.1.2.1 Visual-Optical

a. The finished surface of the casting, either as cast or finished machined, shallbe free from cracks or linear defects. Where stated the surface finish shall meetthe standard specified in the Contract.

3.1.2.2 Pressure Tests

a. Each casting supplied shall show no evidence of leakage. (See Clause 1.4.2.3a.)

3.1.2.3 Defects

a. Any casting may be rejected for defects discovered during subsequentmachining notwithstanding that the casting had been previously passed asconforming to this Standard.

3.2 Quality Assurance Documentationa. Each consignment of castings or ingots shall be accompanied by Quality

Assurance Documentation giving the actual results of the tests required inClauses 1.4.1.1a. and 1.4.1.3a., for ingots, and Clauses 1.4.1.2a. and 1.4.1.4a.,for castings, together with Certificate of Conformity for the acceptancestandards detailed in Clause 3.1.

3.3 Identification of Ingots and Castings

a. Ingots shall be supplied palleted and steel strapped in units of approximately500kg (unless otherwise specified by the purchaser), and labelled with a uniquecast number in easily discernible letters and/or figures in such a manner thatthe label will not accidentally become detached. The unique cast number shallpositively relate the ingot to its Quality Assurance Documentation. Ingots fromdifferent melts are not to be supplied on the same pallet.


12

3.3.1 Castingsa. Each casting shall be clearly identifiable during manufacture and be

permanently marked for identification during service life with the followingdetails:

(1) Pattern or Ships Identity Number plus DEF STAN 02-830 Part 1;

(2) Class of casting, ie Class III;

(3) the legend GM;

(4) a unique number that will relate the casting to its quality assurancedocumentation.

b. The markings detailed in Clause 3.3.1a. shall be stamped, engraved orvibroetched in the position indicated on the drawing. Markings shall be asconspicuous as the nature of the casting allows and provision shall be made fortransferring identification markings during manufacture, so that the requiredtraceability is maintained throughout the service life of a casting; the markingsare not to be made on the highly stressed regions.

c. Where difficulty is experienced in satisfactorily applying identification symbolsthe Project Manager shall be consulted.

3.4 Packaginga. Except where otherwise stated in the contract, packaging shall be of a standard

that will prevent damage whilst in transit or storage, subject to the affixing ofan appropriate trade label and the addition of the following identificationdetails on each package or case:

(1) Description of castings;

(2) Quantity;

(3) Contract Numbers.

4. DESIGN REQUIREMENTS/GUIDANCE(No relevant information included)

5. CORPORATE EXPERIENCE & KNOWLEDGE5.1 History

a. In the early 1960s naval Construction Research Establishment (NCRE)conducted shock tests on a number of Gunmetal hull valves of the type fittedin conventional submarines (Ref. D/SSC/NA113/850/18/2).

b. A 4 inch standard right angled hull valve failed by complete fracture of theneck. Two similar valves that were tested both showed damage at low shocklevels.

c. The low shock shock factor levels resulted in Nickel Aluminium Bronze (NAB)replacing Gunmetal for submarine hull valves and all first level systems.Gunmetal sand castings are now only class III castings and for surfaceapplications only

5.2 Typical Usesa. Good alloy for pressure tight castings. General purpose alloy for the corrosion

and errosion resistant duties in sea water e.g. medium strength components,lightly loaded bearings and gears. Sand castings used for class III surface shipcastings only.


13

5.3 Joining Methodsa. May be soft soldered. Silver soldering and brazing where restraint absent.

Welding not advised. Minor repairs only are allowable, see DEF STAN 02-771.

5.4 Remarks

a. Very useful general purpose alloy possessing good impingement resistance.High zinc brazing metals should not be used for sea water duties. This materialis superior to the 85-5-5-5 gunmetal for castings subjected to sliding frictionwithout oil lubrication. This material supersedes BS 1400 LG4

b. See Also BR 3008 chapter 1 data Sheet NF4-03.


14

ANNEX A.A.

RELATED DOCUMENTS

A1. The following documents and publications are referred to in this Standard:

BS EN 1982 Copper and Copper Alloys. Ingots and Castings

BS EN 10002-1 Tensile Testing of Metallic Materials

Part 1: Method of Test at Ambient Temperature

JSP 430 Ship Safety Management System Handbook

DEF STAN 03-1 Impregnation of Porous Castings

DEF STAN 02-771(NES 771)

Welding of Copperbased Alloy Castings

DEF STAN 02-863 (NES 863)

Requirements for the Classification, Dimensions, Tolerancesand General Standards of Acceptance for Copper and NickelAlloy Castings

BR 3008 Materials and Processes (Mechanical Engineering)


15

ANNEX B.B.

DEFINITIONS

B1. For the purpose of this Defence Standard the following definitions apply:

Approved Scrap Scrap that is derived from gunmetal the compositionof which can be identified to a cast for whichdocumented analysis is available and segregated andidentifiable to the satisfaction of the Project Manager.

Cast (continuous melting) A cast is 250kg or fraction thereof of metal poured.

Cast (noncontinuous melting) A cast is:

a. the product of one furnace melt;

or

b. the product of one crucible melt;

or

c. the product of a number of furnace or crucible melts where such are aggregated and mixed prior to sampling.

Continuous Melting In continuous melting for the production of castings,when the content of a melting/holding furnace orcrucible is supplemented from time to time by theaddition of metal to maintain an adequate bulk ofliquid metal.

Contractor The Firm, Company, Organization or Establishmentworking within the scope of this Standard.

Ingot A mass of metal of proportions to suit the Foundersremelting requirements.

Project Manager The Section within the Defence Procurement Agencyor Defence Logistics Organization, acting on behalf ofthe Secretary of State for Defence. The ProjectManager should be specified in the Contract, butwhere not known by the contractor, enquiries are to beforwarded to Defence Procurement Agency SectionSTGMT Abbey Wood, Bristol. For sub-contractors,the Project Manager may be the Prime Contractor.

S0 The crosssectional area of the gauge in a tensile testpiece, before testing, as detailed in BS EN 10002.


16

ANNEX C.C.

PROCUREMENT CHECK LIST

Notes:

C.1 This Check List is to ensure that certain aspects of this Defence Standard are consulted when preparing a procurement specification for a particular applicationapplication.

C.2 Clauses where a preference for an option is to be used or where specific data is to be added are included in the Check List.

C.3 Each item is to be marked either:

= included

NA = not applicable

CHECKNo

CHECK CLAUSE No or NA

1 Operating temperature does not exceed 230C 1.1.2c.

2 Acceptance criteria to be agreed where castingis other than Class III.

1.3a.

3 Surface finish standard to be specified? 3.1.2.1a.

4 Are there any special supply conditions? 3.3a.

5 Are there any special packaging requirements? 3.4a.

DEF STAN 02830 PART1 / ISSUE 2(NES 830)

17

ALPHABETICAL INDEX(Note: Page numbers are given)

AAnalytical sample, 7

CCasting stock, 7

Certificate of Conformity, 12

Chemical composition, 7

Cracks, 12

DDensity, 7

FFreezing range, 8

IImperfections, 10

LLeakage, 11

Linear defects, 11

NNon-designated area, 9

SScrap, 8

Shock loading, 8

Surface finish, 11

TTensile tests, 9, 11

Test bars, 9

Trade label, 12

UUnique cast number, 12

WWater pressure test, 10

Weld repair, 10


18

Inside Rear Cover

Crown Copyright 2002

Copying Only as Agreed with DStan

Defence Standards are Published by and Obtainable from:

Defence Procurement AgencyAn Executive Agency of The Ministry of Defence

UK Defence StandardizationKentigern House65 Brown Street

GLASGOW G2 8EX

DStan Helpdesk

Tel 0141 224 2531/2 Fax 0141 224 2503

Internet e-mail [email protected]

File Reference

The DStan file reference relating to work on this standard is D/DStan/69/02/830 Pt 1.

Contract Requirements

When Defence Standards are incorporated into contracts users are responsible for their correctapplication and for complying with contractual and statutory requirements. Compliance witha Defence Standard does not in itself confer immunity from legal obligations.

Revision of Defence Standards

Defence Standards are revised as necessary by up issue or amendment. It is important thatusers of Defence Standards should ascertain that they are in possession of the latest issue oramendment. Information on all Defence Standards is contained in Def Stan 00-00 Standardsfor Defence Part 3 , Index of Standards for Defence Procurement Section 4 Index of DefenceStandards and Defence Specifications published annually and supplemented regularly byStandards in Defence News (SID News). Any person who, when making use of a DefenceStandard encounters an inaccuracy or ambiguity is requested to notify the Directorate ofStandardization (DStan) without delay in order that the matter may be investigated andappropriate action taken.

CONTENTSTITLE PAGESCOPEFOREWORDSponsorshipConditions of ReleaseCategories of StandardRelated DocumentsHealth and SafetyAdditional Information

1. PERFORMANCE SPECIFICATION1.1 Physical Characteristics1.1.1 IngotsTable 1.1 IngotsChemical Composition1.1.2 CastingsTable 1.2 CastingsChemical Composition1.1.3 Density

1.2 Mechanical Properties1.3 ClassificationTable 1.3 Mechanical Properties

1.4 Test Methods1.4.1 Destructive Tests1.4.2 Non-Destructive TestsTable 1.4 Test Duration

1.5 Defects and Rectification of Defects1.5.1 Rectification of Defects1.5.2 Rectification of Surface Defects by Blending1.5.3 Impregnation

2. NATIONAL/INTERNATIONAL REGULATIONS3. MILITARY STANDARDS/REQUIREMENTS3.1 Acceptance Standards3.1.1 Destructive Examination Standards3.1.2 Non-destructive Examination Standards

3.2 Quality Assurance Documentation3.3 Identification of Ingots and Castings3.3.1 Castings

3.4 Packaging

4. DESIGN REQUIREMENTS/GUIDANCE5. CORPORATE EXPERIENCE & KNOWLEDGE5.1 History5.2 Typical Uses5.3 Joining Methods5.4 Remarks

ANNEX A. RELATED DOCUMENTSANNEX B. DEFINITIONSANNEX C. PROCUREMENT CHECK LISTALPHABETICAL INDEX

NES 830 Part 1Requirements for Gunmetal Ingots and Castings - Category 3

Documents

Transcript of NES 830 Part 1Requirements for Gunmetal Ingots and Castings - Category 3