HV Sets- HDG, A490 equivalent High-Strength Structural Bolting

Assemblies for Preloading - Made in Germany -

August Friedberg GmbH

NASCC 17-19. April 2013

Developing Fasteners since 1884

Engineers considering 150KSI hot dip galvanized fasteners will find the following benefits for their project:

Highest corrosion resistance achieved with hot dip galvanization

HV fasteners set designed as one unit

Suitability for preloading of the set calibrated by the manufacturer

Efficient connection design with more options than ASTM A490

Excellent lot traceability of each set due to ID mark on the fasteners

Saving assembly time and costs

Reduction of maintenance costs 2/20

Introduction

Relevant standards for hot dip galvanized fasteners

EN 14399-1: General Requirements

EN 14399-2: Suitability test for preloading

EN 14399-4: Hexagon bolt and nut assemblies M12-M36

EN 14399-6: Plain chamfered washers M12-36

EN 14399-8: Hexagon fit bolt and nut assemblies M12-M36

EN 14399-9: Direct tension indicators for bolt and nut assemblies

DASt-Guideline 021: Hexagon bolting assemblies M39-M64

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Product Standards

HV Sets are currently utilized around the world in the most demanding environments in steel structures.

These include thousands of onshore and offshore wind towers erected across the United States. Global players in the wind industry including- General Electric, Vestas and GAMESA have trusted FRIEDBERG to supply hot dip galvanized bolts and double ended studs for decades.

They can also found in some of the world's tallest buildings, bridges, offshore platforms and most roller coasters where critical fasteners are vital.

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Introduction

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Diamond of Istanbul

Commerzbank tower Gasometer Oberhausen Burj al Arab

Veltins-Arena Köhlbrand-Bridge Hamburg Windpark Horns Reef, Denmark

Different roller coasters

Also that which is BREATH-TAKING is built on TRUST.

World Wide Projects

You may be concerned that hot dip galvanization of high strength fasteners will cause hydrogen and liquid metal induced embrittlement.

This process has been refined for over 60 years, so let us show you how it works with high certainty!

Key points for manufacturing HDG HV Sets:

Utilizes a unique high quality raw material steel alloy

Highly controlled, precision manufacturing processes

Highly controlled hot dip galvanization processes

Hot Dip Galvanization

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Hot Dip Galvanization

Essential Parameters: Restriction of phosphorus P and sulfur S in the raw material Limiting the non-metallic inclusions in the raw material Avoid using d-Ferrite due to insufficient pretreatment/cleaning Precision heat treating that avoids carburization Restriction of the maximum tensile capacity to 1170 N/mm² Restriction of the maximum surface hardness to 375 HV 0.3 Use of proven inhibitors in the pickling bath Limiting the pickling time Defined zinc bath concentration according to DASt Guideline 022 Defined zinc bath temperature range depending on the bolt size … Long established manufacturer and galvanizer know-How !!!

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Hot Dip Galvanization

Degreasing with prior shot blasting (optional)

Acid pickling (defined inhibitors, acid concentration, pickling time)

Tempering process if necessary

Application of a special flux material with subsequent drying phase

Zinc Bath Dip (defined zinc bath consistence and dipping time)

Centrifuge process to avoid zinc residuals mainly in the threads

Quenching to reduce undefined layer growth and similar optical appearance

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Hot Dip Galvanization

Schematic HDG Process Steps

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Larger wrench size for uniform stress concentration under head

Larger under head radius for lower notch effect

special rounded thread run-out for decreasing notch effect

Hot Dip Galvanization

Geometrical bolt optimization

Hot dip galvanization

Hot dip galvanized coatings usually used for EN high-strength structural bolting assemblies and zinc flake coating for ASTM when exposed to extreme outdoor conditions (pictures show

condition after 2 years offshore conditions)

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zinc flake coating

Corrosion Resistance

EN 14399-4 ASTM A490

Size Range

M12 M16 M20 M22 M24 M27 M30 M36

M39 – M64 (DASt Guideline 021)

--- 5/8” 3/4” ---

7/8” 1”

1 1/8” 1 3/8”

Not Available(1 1/2” - 2 1/2”)

Surface finish

As processed Hot dip galvanization

Other coatings to be agreed

As processed Hot dip galvanization not avail.

Zinc flake coatings

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EN – ASTM Comparison

Size variation and corrosion protection

EN – ASTM Comparison

EN 14399-4 ASTM A490 equivalent

Size M20 ¾“

Available Tensile Capacity Minimum tensile strength 150 ksi

ASD (W=2) [kips] 27.54 25.00

LRFD (f=0,75) [kips] 41.31 37.40

Available Shear Capacity Loading X (threads excluded)

ASD (Wv=2) - S/D [kips] 20.45 / 40.90 18.55 / 37.09

LRFD (f=0,75) [kips] 30.68 / 61.36 27.82 / / 55.64

Slip Critical Connection STD – Standard Hole

ASD (Wv=2) - S/D [kips] 9.48 / 18.97 9.23 / 18.46

LRFD (f=1,0) [kips] 14.23 / 28.45 13.84 / 27.69

Design Values (Example M20 vs. ¾”)

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EN – ASTM Comparison

Friedberg Fasteners have their own brain.

The entire manufacturing process is fully traceable from the Material Test Reports of the raw materials, the manufacturing processes, heat treatment and the galvanizing.

All information for each production batch manufactured is fully documented going back over 20 years.

Further specifics are a fully traceability of fasteners

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Traceability

Manufacturer ID

Property Class

System HV

Manufacturer ID Friedberg

Property class

Manufacturing year

Manufacturing Batch

System HV: High strength for defined preloading

Opt. torque values > M36

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Bolt Traceability

HV-Nuts are hot dip galvanized, tapped after galvanization process and afterwards lubricated by the manufacturer to a calibrated torque-tension relation. No additional lubrication on site is necessary and should be avoided! Threads are oversized to a tolerance grade 6AZ according to ISO 965-5 and therefore marked with sign „Z“.

Manufacturer ID

Property Class

System HV Manufacturing batch(1) and year (T)

Certification CE-sign

Tolerance oversized

Manufacturer ID AF: Friedberg

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Traceability

Manufacturer ID

Marking H or HV

Marking of the washer on its bearing surface. Washer shows internal and external chamfers. Chamfers are oriented to the hexagon bolt head and nut bearing surface. The external chamfer shows the existence of an internal chamfer for this system. Traceability through the delivery notes.

Certification CE-sign

Manufacturer ID AF: Friedberg

System HV

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Washer Traceability

Friedberg Professional Competence

Cold forming of bolt sizes up to M36

Hot forging of bolts up to M72 and nuts up to M42

In house heat treatment processes in continuous and batch type furnaces

Various threading machines

Computer aided mechanical machining/turning centers for customized parts

Surface coatings at ISO certified companies and under Friedberg surveillance

Hot dip galvanization acc. to ISO 10684

Zinc flake coatings acc. to ISO 10683

Electroplated coatings acc. to ISO 4042

In-House Manufac. Processes

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Wind Industry Industry Automotive Steel

Construction

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Delivering in branches…

Headquarter Gelsenkirchen, Germany

Friedberg Produktions-gesellschaft mbH Gelsenkirchen (GER)

Formteil- und Schraubenwerk Finsterwalde GmbH Finsterwalde (GER)

A. Friedberg do Brasil Ind. E Com. Ldta. Monte Mor (Brazil)

Prepart GmbH Lichtenfels-Goddelsheim (GER)

Sales / Production (South America)

Production facilities

August Friedberg Americas Inc. Cleveland (USA)

August Friedberg Asia Inc. Busan (South Korea)

Sales Offices (Commission merchant for the German production facilities)

August Friedberg GmbH

Indianapolis (USA) Warehouse

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Company Overview

Contact August Friedberg Americas Inc. 1250 Linda Street Rocky River, OH 44116 USA August Friedberg GmbH Achternbergstraße 38A D-45884 Gelsenkirchen Germany Tel.: +49 209 9132 - 0 Fax: +49 209 3132 - 178 Email: info@august-friedberg.de

Thank you for your attention

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