ASTM A790 Pipe
What is ASTM A790 Steel Pipe?
Duplex Stainless Steel has a structure that contains both ferrite and austenite. Duplex alloys have higher strength and better stress corrosion cracking resistance than most austenitic alloys and greater toughness than ferritic alloys, especially at low temperatures. The corrosion resistance of duplex alloys depends primarily on their composition, especially the amount of chromium, molybdenum, and nitrogen they contain.
ASTM A790/ ASME SA790 is the standard specification for seamless and welded ferritic/austenitic stainless steel pipe. Including duplex stainless steel pipe material. The standard specification mainly covers seamless and longitudinal weld ferritic/austenitic steel pipe, that is applied intended for general corrosive services, with particular emphasis on resistance to stress corrosion cracking. This kind of pipe shall be manufactured by seamless or automatic welding process, without adding filler metal in the welding processes. Heat analysis shall be made to determine the percentages of the chemical elements specified. Tensile tests, hardening test, flattening test, hydrostatic tests and nondestructive tests shall be performed to the specified requirements.
ASTM A790 Steel Pipe Range
Standard: ASTM/ASME A/SA789, A/SA790, A/SA928, DIN17456/17458, EN10216-5. After negotiation, we can supply pipe with customers'requirement.
Material Grade:UNS 31803,S32205,S32101,S32304,S32750,S32760,1.4462,1.4410etc.
ASTM A790 Steel Pipe Size Range
| Stainless Steel Seamless Pipe | ASTM A790/A790M: OD: Φ6mm-Φ325mm; WT:0.5mm-30mm |
| Stainless Steel Welded Pipe | ASTM A790/A790M: OD: Φ10mm-Φ2000mm; WT:0.5mm-40mm(OD≤630mm for single seam; OD＞Φ630mm For circumferential seam) |
| ASTM A928/A928M: OD: Φ10mm-Φ406mm; WT:0.5mm-10mm |
ASTM A790 Steel Pipe Material Grade
|
UNS |
EN |
DIN |
C % |
Cr% |
Ni% |
Mo% |
N% |
Other % |
|
S31803 |
1.4462 |
X2CrNiMoN22-5-3 |
0.030max |
21.0-23.0 |
4.5-6.5 |
2.5-3.5 |
0.08-0.20 |
/ |
|
S32205 |
1.4462 |
X2CrNiMoN22-5-3 |
0.030max |
22.0-23.0 |
4.5-6.5 |
3.0-3.5 |
0.14-0.20 |
/ |
|
S32101 |
1.4162 |
0.040max |
21.0-22.0 |
1.35-1.70 |
0.10-0.80 |
0.20-0.25 |
Cu 0.10-0.80 | |
|
S32304 |
0.030max |
21.5-24.5 |
3.0-5.5 |
0.05-0.60 |
0.15-0.20 |
Cu 0.05-0.60 | ||
|
S32750 |
1.4410 |
X2CrNiMoN25-7-4 |
0.030max |
24.0-26.0 |
6.0-8.0 |
3.0-5.0 |
0.24-0.32 |
Cu 0.50max |
|
S32760 |
0.050max |
24.0-26.0 |
6.0-8.0 |
3.0-4.0 |
0.20-0.30 |
Cu 0.50-1.00 |
ASTM A790 Steel Pipe Mechanical Property
| UNS | Tensile Strength Min, Mpa |
Yield Strength Min, Mpa |
Elongation in 2 in Or 50mm Min, % | Hardness Max, HRC |
| S31803 | 620 | 450 | 25 | 30 |
| S32205 | 655 | 485 | 25 | 30 |
| S32101 | 700 | 530 | 30 | 30 |
| S32304 | 690 | 450 | 25 | 30 |
| S32750 | 800 | 550 | 15 | 32 |
| S32760 | 750 | 550 | 25 | 32 |
Manufacturing Process of ASTM A790 Steel Pip 
Application of ASTM A790 Steel Pipe – Petrochemical industry; – Oil Refineries industry; – Chemical Plants; – Low-pressure heater; – Offshore Oil platform; – Power and Nuclear Power industry; – The Machinery and Cement industry; – Civil Engineering – Agrochemicals – Food Industry – Pulp and Paper Industry – Pollution Control – Marine Industry and Shipbuilding
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