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.
