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Chemical Composition

 

Alloy
C
Si
Mn
Cr
Ni
Other
304 AISI
308 AISI
310 AISI
316 AISI
321 AISI
330 AISI
446 AISI
253 MA
Inc. 601
Inc. 800
0.08
0.10
0.05
0.08
0.08
0.08
0.15
0.15
0.06
0.06
1.00
1.00
0.50
1.00
1.00
1.75
1.75
2.20
0.50
0.50
2.00
2.00
2.00
2.00
2.00
2.00
1.50
2.00
1.00
1.00
18.0
20.0
25.0
18.0
18.0
18.0
27.0
20.0
23.0
20.0
8.0
12.0
20.0
10.0
10.0
35.0
-
2.0
bal*
32.0
-
-
-
Mo=3
Ti=5 C
-
N=0.3
Ce=0.04
Al=1.5
Al + Ti

* bal is short for balance.

The Phosphorus content for all alloys is 0.04. The Sulfur content is 0.03 for all.

Many of the alloys are also available as castings, whereby it is usually customary to have higher contents of C and Nb for increased strength and creep rupture properties.