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Carbon		0.02 max
Chromium		19 - 23
Copper		1 - 2
Iron		Balance
Manganese		2 max
Molybdenum		4 - 5
Nickel		23 - 28
Phosphorus		0.045 max
Silicon		1 max
Sulphur		0.035 max

Principal Design Features		904L is an austenitic stainless steel designed for moderate to high corrosion resistance. Its low carbon content improves cleanliness and weld strength.

Applications		Utility scrubber assemblies, acid and fertilizer production equipment.

Machinability		Slow speeds and positive feeds will minimize this alloy's tendency to work harden and glaze. Use chip breakers where possible to overcome problems with long draggy chips.

Welding		Most common fusion and resistance methods may be employed. For maximum corrosion resistance, it is recommended to use filler metals of equal or higher alloy content.

Hot Working		Hot work should proceed after uniform heating to 2000-2200 F. Doe not work the material at less than 1800 F. Full annealing should follow any hot work to reattain maximum ductility and corrosion resistance.

Cold Working		Although higher forces are required, 904L will respond in a similar fashion to other austenitic stainless steels like 304, 316 or 317. Most common operations can be successfully performed.

Annealing		1920-1990 F (1050-1090 C), rapid cooling.

Hardening		This alloy does not respond to heat treatment.. It may only be hardened by cold reduction.

Physical Data : [top]

Density (lb / cu. in.)	0.285
Specific Gravity	7.9
Specific Heat (Btu/lb/Deg F - [32-212 Deg F])	0.12
Electrical Resistivity (microhm-cm (at 68 Deg F))	480
Modulus of Elasticity Tension	28.4

Form		Sheet
Condition		Test Specimen Annealed
Temper		70
Tensile Strength		87
Yield Strength		40
Elongation		50
Reduction of Area		55
Rockwell		B79