ASTM A789 & A790

ASTM A789 & A790 : American Society for Testing and Materials
Seamless Cold-Drawn Low-Carbon Steel Heat-Exchanger and Condenser Tubes.
Appliocation: Refineries; Nuclear Plant; Aerospace Industry; Chemical Fertilizer; Petrochemicals' Oli & Gas and etc.

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Introduction
Description

A789 Chemical Composition
UNS Designation	C max	Mn max	P max	S max	Si max	Ni	Cr	Mo	N	Cu
S31803	0.03	2	0.03	0.02	1	4.5-6.5	21.0-23.0	2.5-3.5	0.08-0.20	-
S31500	0.03	1.20-2.00	0.03	0.03	1.40-2.00	4.25-5.25	18.0-19.0	2.5-3.00	0.05-0.1	-
S32750	0.03	1.2	0.035	0.02	0.8	6.0-8.0	24.0-26.0	3.0-5.0	0.24-0.32	0.5max

A790 Chemical Composition
UNS Designation	C max	Mn max	P max	S max	Si max	Ni	Cr	Mo	N	Cu
S31803	0.03	2	0.03	0.02	1	4.5-6.5	21.0-23.0	2.5-3.5	0.08-0.20	-
S32205	0.03	2	0.03	0.02	1	4.5-6.5	22.0-23.0	3.0-3.5	0.14-0.20	-
S32750	0.03	1.2	0.035	0.02	0.8	6.0-8.0	24.0-26.0	3.0-5.0	0.24-0.32	0.5max

A789 Mechanical Properties
UNS Designation	Tensile Strength, min ksi [Mpa]	Yield Strength, min ksi [Mpa]	Elongation in 2 in. or 50 mm, min, %
S31803	90 [620]	65 [450]	25
S31500	92 [630]	64 [440]	30
S32750	116 [800]	80 [550]	15

A790 Mechanical Properties
UNS Designation	Tensile Strength, min ksi [Mpa]	Yield Strength, min ksi [Mpa]	Elongation in 2 in. or 50 mm, min, %
S31803	90 [620]	65 [450]	25
S32205	90 [620]	65 [450]	25
S32750	116 [800]	80 [550]	15

Available Dimension Range

OD(mm/inch)

Wall thickness(SCH)

STD

100

120

140

160

XXS

…100mm

21.3 (1/2'')

26.7 (3/4'')

33.4 (1'')

42.2 (1 1/4'')

48.3 (1 1/2'')

60.3 (2'')

73 (2 1/2'')

88.9 (3'')

101.6 (3 1/2'')

114.3 (4'')

141.3 (5'')

168.3 (6'')

219.1 (8'')

273 (10'')

323.8 (12'')

355.6 (14'')

406.4 (16'')

457 (18'')

508 (20'')

559 (22'')

610 (24'')

660 (26'')

711 (28'')

762 (30'')

813 (32'')

864 (34'')

914 (36'')

965.2 (38'')

1016 (40'')

*If the steel grades and size you are looking for are not listed above, please contact us for further information.

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