Stainless Steel 405

Chemical Analysis
C Carbon
0.08max
Mn Manganese
1.00 max
P Phosphorus
0.040 max
S Sulfur
0.030 max
Si Silicon
1.00 max
Cr Chromium
11.50 – 14.50
Al Aluminum
0.10 – 0.30

General Characteristics of Stainless Steel 405

This is a ferritic stainless steel with lower corrosion resistance than type 430, for example, and corrosion resistance similar to that of type 410. It has better weldability than type 410.

Applications of Stainless Steel 405

The grade is used for similar applications to other lower chromium ferritics, where mildly corrosive environments are involved.

Forging Stainless Steel 405

The alloy may be forged in the range 2050/1500ÂşF (1120/815ÂşC) and air cooled. The effect of the aluminum addition is to prevent hardening when the material is cooled from elevated temperatures.

Heat Treatment

Annealing

Parts should be heated to 1440ÂşF (780ÂşC,) soaked and air cooled. Type 405 cannot be hardened by heat treatment.

Machinability

There will be some chip build up on tools when machining this alloy, as with other ferritic stainless types. The material’s machinability is, however, superior to that of the austenitic types.

Weldability

This alloy is weldable by all normal fusion and resistance methods. The aluminum addition prevents hardening when cooling from welding, hence effects an overall improvement in weldability.

 

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