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ASTM SA312 TP904L Stainless Steel Welded Pipes UNS N08904 Pipes

ASTM SA312 TP904L Stainless Steel Welded Pipes UNS N08904 Pipes

The addition of copper to this grade gives it corrosion resistant properties superior to the conventional chrome nickel stainless steels, in particular to sulphuric, phosphoric and acetic acids.

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Grade 904L stainless steel is a non-stabilized austenitic stainless steel with low carbon content. This ASTM B677 TP 904L Stainless Steel Pipe has added copper to improve its resistance to strong reducing acids, such as sulphuric acid. The ASME SA 312 904L Stainless Steel Pipe is also resistant to stress corrosion cracking and crevice corrosion. UNS N08904 also known as 904L falls in the austenitic stainless steel group. Stainless Steel 904L Seamless Pipe has high molybdenum and extremely low carbon content.

TP 904L Welded Pipes 904L Stainless Steel Pipe

Copper content in the alloy greatly improves resistance to strong reducing acids, especially (H2SO4) sulphuric acid. Stainless Steel 904L Pipe has better resistance. Ti chloride attack against both stress corrosion cracking and crevice / pitting corrosion. With excellent weldability and formability 904L also maintain non-magnetic state in all conditions. 904L super austenitic stainless steel is a low-carbon, high-nickel, molybdenum austenitic stainless and acid-resistant steel, which is a proprietary material imported from HT PIPE.

 

904L thin wall stainless steel tube has good activation-passivation transformation ability, excellent corrosion resistance, good corrosion resistance in non-oxidizing acids such as sulfuric acid, acetic acid, formic acid, and phosphoric acid, and good corrosion resistance in neutral chloride-containing media It has good pitting corrosion resistance and good resistance to crevice corrosion and stress corrosion. UNS N08904 pipe is suitable for sulfuric acid and has good corrosion resistance in acetic acid at any concentration and at any temperature and the mixed acid of formic acid and acetic acid under normal pressure. SS TP 904L Welded Pipe provides excellent toughness , even down to cryogenic temperatures with its austenitic structure.

 

Alloy 904 (N08904) stainless steel is a high alloy austenitic product intended for use under severely corrosive conditions. It offers good resistance to:

Pitting and crevice corrosion
Intergranular corrosion
Stress corrosion cracking
General corrosion

 

Physical Properties of   UNS N08904/1.4539 & 904L Stainless Steel Pipes

Grade Density (kg/m3) Elastic Modulus (GPa) Mean Coefficient of Thermal Expansion (m/m/0C) Thermal Conductivity (W/m.K) Specific Heat 0-1000C (J/kg.K) Electrical Resistivity (n.m)
0-1000C 0-3150C 0-5380C at 1000C at 5000C
904L 8000 200 15 13 500 850
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