Stainless Steel Grade 321 - High Temperature Resistant Grade

Composition

Typical compositional ranges for grade 321 stainless sheets of steel are given in table 1.

Table 1. Composition ranges for 321-grade stainless steel

Grade		C	Mn	Si	P	S	Cr	Mo	Ni	N	Other
321	min. max	- 0.08	2.00	0.75	0.045	0.030	17.0 19.0	-	9.0 12.0	0.10	Ti=5(C+N) 0.70
321H	min. max	0.04 0.10	2.00	0.75	0.045	0.030	17.0 19.0	-	9.0 12.0	-	Ti=4(C+N) 0.70
347	min. max	0.08	2.00	0.75	0.045	0.030	17.0 19.0	-	9.0 13.0	-	Nb=10(C+N) 1.0

 

Mechanical Properties

Typical mechanical properties for grade 321 stainless sheets of steel are given in table 2.

Table 2. Mechanical properties of 321-grade stainless steel

Grade	Tensile Strength (MPa) min	Yield Strength 0.2% Proof (MPa) min	Elongation (% in 50 mm) min	Hardness
				Rockwell B (HR B) max	Brinell (HB) max
321	515	205	40	95	217
321H	515	205	40	95	217
347	515	205	40	92	201