ASTM A790 UNS S39274 Stainless Steel Tube For Offshore and Marine Engineering
ASTM A790 UNS S39274 Stainless Steel Tube For Offshore and Marine Engineering
Specifications
ASTM A790 covers seamless and straight-seam welded ferritic/austenitic stainless steel pipe intended for general-purpose applications.
ASTM A790 UNS S39274 stainless steel tube is a super duplex steel pipe that is both seamless and welded, designed for corrosive environments and known for its high strength and resistance to stress corrosion cracking. This material is compliant with the ASTM A790 standard, which specifies chemical composition, heat treatment, and mechanical property requirements. The UNS S39274 grade includes tungsten and has a high chromium content, making it suitable for demanding applications in the oil and gas, marine, and chemical industries.
| American Standard | Standard Name |
| A 790 / SA 790 | Seamless and Welded Ferritic/Austenitic Stainless Steel Pipe |
ASTM A790 UNS S39274 Stainless Steel Tube Chemical Composition
(Sources American Standard A790 / A790M TABLE 2 Chemical Requirements)
| UNS Designation A | C | Mn | P | S | Si | Ni | Cr | Mo | N | Cu | Others |
| S39274 | 0.03 | 1 | 0.03 | 0.02 | 0.8 | 6.0–8.0 | 24.0–26.0 | 2.5–3.5 | 0.24–0.32 | 0.2-0.80 | W 1.50-2.50 |
ASTM A790 UNS S39274 Stainless Steel Tube Mechanical Properties
(Sources American Standard A790 / A790M TABLE 3 Tensile and Hardness Requirements)
| UNS Designation | Tensile strength, | Yield strength, | Elongation | Hardness, max | |
| min, | min | in 2 in. or 50 | |||
| ksi[MPa] | ksi[MPa] | mm, min,% | HNW | HRC | |
| S39274 | 116 [800] | 80 [550] | 15 | 310 | 32 |
ASTM A790 UNS S39274 Stainless Steel Tube Application
- Oil & Gas Industry (Sour Service & Offshore)
- Offshore & Marine Engineering
- Chemical & Process Industry (Highly Aggressive Media)
- Desalination Industry
- Pollution Control & FGD Systems
- Power Generation
ASTM A790 UNS S39274 Stainless Steel Tube Packing & Loading
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