Stainless Steel 309

  Specifications

 

The following specifications cover Stainless Steel 309

 

	AISI 309
	ASTM A167
	ASTM A249
	ASTM A276
	ASTM A473 (Forging - Open Die)
	ASTM A479
	DIN 1.4828
	UNS S30900

 

 

No Related Metal names.

  Chemistry Data :

Carbon	0.2 max
Chromium	22 - 24
Iron	Balance
Manganese	2 max
Nickel	12 - 15
Phosphorus	0.045 max
Silicon	1 max
Sulphur	0.03 max

Principal Design Features		This alloy is known for good strength and oxidation resistance in continuous service temperatures up to 2000 F (1093 C).It is superior to 304 stainless in both strength and corrosion resistance.

Applications		Oven linings, boiler baffles, fire box sheets, furnace components and other high temperature containers.

Machinability		This alloy machines similarly to type 304 stainless. Its chips are stringy and it will work harden rapidly. It is necessary to keep the tool cutting at all times and use chip breakers.

Welding		Most of the austenitic stainless steels can be readily welded using fusion or resistance methods. Oxyacetylene welding is not recommended. Filler metal should be AWS E/ER 309 or 309L.

Hot Working		Working temperatures are 2150 F (1177 C), with reheating necessary at 1800 F (982 C).Rapid quenching is recommended. Full post-work annealing is required to reattain maximum corrosion resistance.

Cold Working		Although this alloy has a high work hardening rate, it can be drawn, headed, upset, and stamped. Full annealing is required after cold work to remove internal stress.

Annealing		1900-2050 F (1038-1121 C), water quench.

Hardening		This alloy does not respond to heat treatment. Cold work will cause an increase in both hardness and strength.

Physical Data :

Density (lb / cu. in.)	0.287
Specific Gravity	7.9
Specific Heat (Btu/lb/Deg F - [32-212 Deg F])	0.12
Electrical Resistivity (microhm-cm (at 68 Deg F))	468
Melting Point (Deg F)	2650
Modulus of Elasticity Tension	29