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Tank Road, Mumbai, Maharashtra
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Chemical Composition

Table 1. Composition ranges for 904L grade of stainless steels.
Grade C Mn Si P S Cr Mo Ni Cu
904L min. max. - 0.020 - 2.00 - 1.00 - 0.045 - 0.035 19.0 23.0 4.0 5.0 23.0 28.0 1.0 2.0

Mechanical Properties

Table 2. Mechanical properties of 904L grade stainless steels.
Grade Tensile Strength (MPa) min Yield Strength 0.2% Proof (MPa) min Elongation (% in 50mm) min Hardness
Rockwell B (HR B) Brinell (HB)
904L 490 220 35 70-90 typical -
Rockwell Hardness value range is typical only; other values are specified limits.

Physical Properties

Table 3. Typical physical properties for 904L grade stainless steels.
Grade Density
(kg/m3)
Elastic Modulus
(GPa)
Mean Co-eff of Thermal Expansion (µm/m/°C) Thermal Conductivity
(W/m.K)
Specific Heat 0-100°C
(J/kg.K)
Elec Resistivity
(nΩ.m)
0-100°C 0-315°C 0-538°C At 20°C At 500°C
904L 8000 200 15 - - 13 - 500 850

Grade Specification Comparison

Table 4. Grade specifications for 904L grade stainless steels.
Grade UNS No Old British Euronorm Swedish SS Japanese JIS
BS En No Name
904L N08904 904S13 - 1.4539 X1NiCrMoCuN25-20-5 2562 -
These comparisons are approximate only. The list is intended as a comparison of functionally similar materials not as a schedule of contractual equivalents. If exact equivalents are needed original specifications must be consulted.

Possible Alternative Grades

Table 5. Possible alternative grades to 904L stainless steel.
Grade Why it might be chosen instead of 904L
316L A lower cost alternative, but with much lower corrosion resistance.
6Mo A higher resistance to pitting and crevice corrosion resistance is needed.
2205 A very similar corrosion resistance, with the 2205 having higher mechanical strength, and at a lower cost to 904L. (2205 not suitable for temperatures above 300°C.)
Super duplex Higher corrosion resistance is needed, together with a higher strength than 904L.
 

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Navgraha Steel & Engg Company

Hitesh Doshi (Director)
Room No. 9, 2nd Floor, 29-31, Savita Sadan
Tank Road, Mumbai - 400004
Maharashtra, India
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