Stainless Steel 904L Technical details By yaang.com

Stainless Steel 904L is a low carbon high alloy austenitic stainless steel, with an chromium, nickel, molybdenum and copper content,  which is widely used in applications where the corrosion properties of  Stainless Steel 316L & Stainless Steel 317L are not adequate. although originally develop for greatly improved resistance to strong reducing acids, particularly sulphuric acid. It also has an very high resistance to a wide range of  environments. This feature has been verified that it is very successful after many years of practical applications, which has results that Stainless Steel 904L has been standardized in many countries.

Grade 904L Stainless Steel By yaang.com

Grade 904L Stainless Steel

Composition

C: ≤ 0.020 - Mn: ≤2.00 - Si: ≤ 0.70 - Cr: 19.00÷21.00 - Ni: 24.00÷26.00 - Mo: 4.00÷5.00 - N: ≤ 0.15 - Cu: 1.2÷2.0 - S: ≤ 0.010 - P: ≤0.030

Standards

EN: X1NiCrMoCu25-20-5 - W.N.: 1.4539 AISI: AISI 904L

Stainless Steel 904L Technical Specification By yaang.com

Stainless Steel 904L is a non-stabilised low carbon high alloy austenitic stainless steel. The addition of copper to this grade gives it greatly improved resistance to strong reducing acids, particularly sulphuric acid. It is also highly resistant to chloride attack - both pitting crevice corrosion and stress corrosion cracking. This grade is non-magnetic in all conditions and has excellent weldability and formability. The austenitic structure also gives this grade excellent toughness, even down to cryogenic temperatures. Stainless Steel 904L does have very substantial contents of the high cost ingredients nickel and molybdenum. Many of the applications in which this grade has previously performed well can now be fulfilled at lower cost by duplex stainless steel 2205 (S31803 or S32205), so it is used less commonly than in the past.