SS 904L, Austenitic Stainless Steel

UNS N08904, EN 1.4539

High Ni and Mo austenitic grade with very high resistance to corrosion. Due to addition of Cu (1.5%), this material displays excellent corrosion resistance against reducing acids such as sulfuric acid and phosphoric acid. Commonly used in chemical and petrochemical industry for handling medium concentrated sulphuric acid.

CHEMICAL PROPERTIES

C Si Mn P S Ni Cr Mo Cu N
Specification (SUS890L) 0.020 1.00 2.00 0.045 0.030 23.00~28.00 19.00~23.00 4.00~5.00 1.00~2.00 —
Specification (UNS N08904) 0.020 1.00 2.00 0.045 0.035 23.0~28.0 19.0~23.0 4.0~5.0 1.0~2.0 0.10

PHYSICAL PROPERTIES

Density [g/cm3]   8.05
Specific heat [J/kg . K]   452
Electrical resistivity [μΩ . cm]   97.2
Thermal conductivity [W/m . K]   12.2
Average coefficient of thermal expansion [10-6/°C] 20~100°C 14.4
    20~200°C 14.9
    20~300°C 15.3
    20~400°C 15.7
Young's modulus [Mpa]   19.0 × 104
Magnetism     None
Melting range [°C]   1360~1397

MECHANICAL PROPERTIES

0.2% proof stress [MPa] Tensile strength [MPa] Elongation [%] Hardness [HRB]
Specification (SUS 890L) 215490 35 90
Specification (UNS N08904) 220490 35 90
Hot-rolled plate 12mmt 247 593 57 86
Cold-rolled sheet 2mmt 291 632 43 79
Applications:
• Process equipment in chemical industry.
• Petrochemical industry.
• Bleaching equipment in the pulp and paper industry.
• Flue gas cleaning.
• Desalination.

SIZE

Sheet Plate Pipe & Fittings Bar Filler Wire
0.5MM - 3MM 3MM - 25MM ¼ ”NB – 20” NB X SCH 10 – SCH 80 6MM – 250MM 1.2MM – 4MM
3/8” OD – 4” OD X 0.9MM – 12MM

FORMS & STANDARDS

Forms ASTMASME
Sheets B 625SB 625
Plates B 625SB 625
Pipes B 677SB 677
fittingB 366SB 366
Bar/RodB 649SB 649
FastnersB 625B 625
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