A790.pdf
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2-28 ASTM Pipe Specifications Aal co Tel. 01932 250100 Fax: 01932 250101 E-mail: Mark eti [email protected] A 790 Seamless and Welded Duplex Pipe Ordering Information Note - The abo ve tab le is bas ed on AST M requi reme nts exc ept wit h regar d to alter nativ e end fin ishe s and test r epor ts, whe re standard practice options are added. See also page 10-2 for ISO based ordering and general delivery informatio n. Operational Requirements ❍ Product Analysis of one billet, or one length of flat rolled stock from each heat, or two pipes from each lot, may be requested. Conformance with chemical composition table is required. S1 Product Analysis. Performed on 1 in 10 lengths of pipe >NPS 5, or on 10% of lengths of pipe <NPS 5, per heat of steel if smaller. S1 Tranverse Tension Tests. For NPS 8 and larger only, test performed on one end of 10% of pipe lengths per heat of steel. S1 Flattening Test. Performed on one or both ends of each pipe. If this supplementary requirement is specified then the number of tests per pipe must to stated. S1 Etching Tests. Etching tests will show the homogeneity of pipes and are made on a cross section from one or both ends of a pipe in accordance with appropriate portions of Method E381. Tensile and Hardness Requirements Item Notes Specification number ASTM A 790/A 790M - 95 Size Nominal pipe size or outside diameter. Schedule or average wall thickness. Quantity Random or specified lengths. T otal length or n umber of length s. Name of material Duplex stainless steel pipe Process Seamless or welded duplex stainless steel pipe Grade Selected from chemical compositi on table End finish Plain ends with all burrs removed is ASTM requirement. Bevelled, or other end finishes can be specified. T est report DIN 50049.3.1.B standard, or DIN 50049.3.1.C optional (3rd party witness test) at extra cost Opt ions and sup ple mentary requi rement s Refer to opt ion al and sup ple mentar y r equ ir ement s S1 t o S4 UNS Tensile Strength min Yield Strength min Elon gat ion in 2 in (50 mm) mi n Hardness max ksi MPa ksi MPa % Brinell HB Rockwell HRC S31803 90 620 65 450 25 290 30.5 S31500 92 630 64 440 30 290 30.5 S32550 110 760 80 550 15 297 31.5 S31200 100 690 65 450 25 280 - S31260 100 690 65 450 25 - - S32304 87 600 58 400 25 290 30.5 S39274 116 800 80 550 15 310 - S32750 1 16 800 80 550 15 310 32 S32760 109-130 750-895 80 550 25 270 - S32900 90 620 70 485 20 271 28 S32950 100 690 70 480 20 290 30.5 S39277 120 825 90 620 25 290 30
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Transcript of A790.pdf
2-28
ASTM Pipe Specifications
Aalco Tel. 01932 250100 Fax: 01932 250101 E-mail: [email protected]
A 790 Seamless and Welded Duplex Pipe
Ordering Information
Note- The above table is based on ASTM requirements except with regard to alternative end finishes and test reports, where
standard practice options are added. See also page 10-2 for ISO based ordering and general delivery information.
Operational Requirements
❍ Product Analysis of one billet, or one length of
flat rolled stock from each heat, or two pipes from
each lot, may be requested. Conformance with
chemical composition table is required.
S1 Product Analysis. Performed on 1 in 10
lengths of pipe >NPS 5, or on 10% of lengths of
pipe <NPS 5, per heat of steel if smaller.
S1 Tranverse Tension Tests. For NPS 8 and
larger only, test performed on one end of 10% of
pipe lengths per heat of steel.
S1 Flattening Test. Performed on one or both ends
of each pipe. If this supplementary requirement
is specified then the number of tests per pipe
must to stated.
S1 Etching Tests. Etching tests will show the
homogeneity of pipes and are made on a cross
section from one or both ends of a pipe in
accordance with appropriate portions of Method
E381.
Tensile and Hardness Requirements
Item Notes
Specification number ASTM A 790/A 790M - 95
Size Nominal pipe size or outside diameter.Schedule or average wall thickness.
Quantity Random or specified lengths.Total length or number of lengths.
Name of material Duplex stainless steel pipe
Process Seamless or welded duplex stainless steel pipe
Grade Selected from chemical composition table
End finish Plain ends with all burrs removed is ASTM requirement.Bevelled, or other end finishes can be specified.
Test report DIN 50049.3.1.B standard, or DIN 50049.3.1.C optional (3rdparty witness test) at extra cost
Options and supplementary requirements Refer to optional and supplementary requirements S1 to S4
UNS
Tensile Strengthmin
Yield Strengthmin
Elongation in 2 in(50 mm) min
Hardnessmax
ksi MPa ksi MPa %Brinell
HBRockwell
HRC
S31803 90 620 65 450 25 290 30.5
S31500 92 630 64 440 30 290 30.5
S32550 110 760 80 550 15 297 31.5
S31200 100 690 65 450 25 280 -
S31260 100 690 65 450 25 - -
S32304 87 600 58 400 25 290 30.5
S39274 116 800 80 550 15 310 -
S32750 116 800 80 550 15 310 32
S32760 109-130 750-895 80 550 25 270 -
S32900 90 620 70 485 20 271 28
S32950 100 690 70 480 20 290 30.5
S39277 120 825 90 620 25 290 30
ASTM Pipe Specifications
2-29Aalco Tel. 01932 250100 Fax: 01932 250101 E-mail: [email protected]
Seamless and Welded Duplex Pipe A 790
Heat Treatment
Chemical Composition
Composition Notes1 Copper 1.5-2.5%2 Copper 0.20-0.80%, Tungsten 0.10-0.50%3 Copper 0.05-0.60%4 Copper 0.20-0.80%, Tungsten 1.50-2.50%5 Copper 0.50% max6 Copper 0.50-1.00%, Tungsten 0.50-1.00%7 Chromium + (3.3 x Molybdenum) + (16 x Nitrogen) = 40 min8 Copper 1.2-2.0%, Tungsten 0.8-1.2%
Note- Tungsten is sometimes referred to as Wolfram.
UNSTemperature
°FTemperature
°CTreatment
S31803 1870-2010 1020-1100 Treatment temperature range. Rapid cooling in air or water
S31500 1800-1900 980-1040 Treatment temperature range. Rapid cooling in air or water
S31200 1920-2010 1050-1100 Treatment temperature range. Rapid cooling in water
S32550 1900 min 1040 min Treatment temperature. Rapid cooling in air or water
S31260 1870-2010 1020-1100 Treatment temperature range. Rapid cooling in water
S32304 1700-1920 925-1050 Treatment temperature range. Rapid cooling in air or water
S39274 1920-2060 1050-1125 Treatment temperature range. Rapid cooling in air or water
S32750 1880-2060 1025-1125 Treatment temperature range. Rapid cooling in air or water
S32760 2010-2085 1100-1140 Treatment temperature range. Rapid cooling in air or water
S32900 1700-1750 925-955 Treatment temperature range. Rapid cooling in air or water
S32950 1820-1880 990-1025 Treatment temperature range. Air cool
S39277 1975-2155 1080-1180 Treatment temperature range. Rapid cooling in air or water
UNSComposition Percentage, max or range
Carbon
CManganese
MnPhosphorus
PSulphur
SSilicon
SiNickel
NiChromium
Cr Molybdenum
MoNitrogen
N Note
S31803 0.030 2.0 0.030 0.020 1.00 4.50-6.50 21.0-23.0 2.50-3.50 0.08-0.20
S31500 0.030 1.20-2.00 0.030 0.030 1.40-2.00 4.25-5.25 18.0-19.0 2.50-3.00 0.05-0.10
S32550 0.040 1.5 0.040 0.030 1.0 4.50-6.50 24.0-27.0 2.90-3.90 0.10-0.25 1
S31200 0.030 2.0 0.045 0.030 1.0 5.50-6.50 24.0-26.0 1.20-2.00 0.14-0.20
S31260 0.030 1.00 0.030 0.030 0.75 5.50-7.50 24.0-26.0 2.50-3.50 0.10-0.30 2
S32304 0.030 2.50 0.040 0.040 1.0 3.0-5.5 21.5-24.5 0.05-0.60 0.05-0.20 3
S39274 0.030 1.0 0.030 0.020 0.80 6.0-8.0 24.0-26.0 2.50-3.50 0.24-0.32 4
S32750 0.030 1.2 0.035 0.020 0.8 6.0-8.0 24.0-26.0 3.0-5.0 0.24-0.32 5
S32760 0.05 1.00 0.030 0.010 1.00 6.00-8.0024.00-26.00
3.00-4.00 0.20-0.30 6,7
S32900 0.08 1.00 0.040 0.030 0.75 2.50-5.0023.00-28.00
1.00-2.00 -
S32950 0.03 2.00 0.035 0.010 0.60 3.50-5.2026.00-29.00
1.00-2.50 0.15-0.35
S39277 0.025 0.80 0.025 0.002 0.80 6.5-8.0024.00-26.00
3.00-4.00 0.23-0.33 8
