904L Pipe & Tubing

904L is a high-alloy austenitic stainless-steel with little carbon content. The quality is meant for use under serious corrosive conditions. It had been application proven over several years and was initially designed to withstand corrosion in dilute sulfuric acid. It will be standardized and also authorized for pressure vessel utilize in many nations. Structurally, 904L is completely austenitic it is much less too sensitive to precipitation ferrite and also sigma phases compared to conventional austenitic grades with higher molybdenum content. Characteristically, because of the mixture of relatively higher contents of chromium, nickel, molybdenum and copper 904L provides high-quality resistance to basic corrosion, especially in sulfuric and also phosphoric conditions.

The addition of copper to this quality provides it corrosion protected properties more advanced than the conventional chrome nickel stainless steel, specifically to sulphuric, phosphoric and also acetic acids. But, there is certainly minimal use with hydrochloric acids. This also provides an excellent protection to pitting in chloride solutions, an excellent resistance to both crevice and then stress corrosion cracking. Alloy 904L performs much better than other austenitic stainless steel steels because of the much higher alloying of nickel as well as molybdenum.

Standards – 904L Pipe & Tubing

Standard Specification for UNS N08904, UNS N08925, and UNS N08926 Seamless Pipe and TubeASTM B 677
Standard Specification for UNS N08904, UNS N08925, and UNS N08926 Welded TubeASTM B 674
Standard Specification for UNS N08904, UNS N08925, and UNS N08926 Welded PipeASTM B 673
Standard Specification for Electric-Fusion-Welded Austenitic Chromium-Nickel Stainless Steel Pipe for High-Temperature Service and General ApplicationsASTM A 358
Standard Specification for Welded Austenitic Steel Boiler, Superheater, Heat-Exchanger, and Condenser TubesASTM A 249
Standard Specification for Seamless and Welded Austenitic Stainless Steel Tubing for General ServiceASTM A 269
Standard Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger TubesASTM A 213
Standard Specification for Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel PipesASTM A 312
Standard Specification for Seamless Stainless Steel Mechanical TubingASTM A 511

Mechanical Properties – 904L Tubing & Pipe

Tensile Strength : Unit – ksi (MPa) , Minimum
Yeild Strength : 0.2 % Offset , Unit – ksi (MPa) , Minimum
Elongation : in 2″, Unit : % , MinimumValues as per ASTM A 213

Condition & GradeTensile StrengthYeild StrengthElognationHardness
Annealed71 (490)31(215)3590 HRB max

Petrochemical Industry

Welded Pipe

904L Pipe

Stocking & Supplying Seamless & Welded Pipes as small as 1/4″ NB and 6″ NB. Thickness ranging from Sch 10 to Sch 80.

Tube / Tubing

904L Tube / Tubing

Stocking & Supplying Seamless & Welded Tubes / Tubing from 6mm OD to 101.6mm OD. Thickness ranging from 0.8mm to 6mm.