300 series stainless steel, 321 stainless steel, 321 stainless steel knowledge

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11-May-2024

321 stainless steel is Ni - Cr - Ti austenitic stainless steel and its performance is very similar with 304. But due to join the metal titanium, 321 has the better grain boundary corrosion resistance and high temperature strength.
ASTM 321 equivalent material:
GB: 0Cr18Ni10Ti
American: 321、S32100、TP321
Japanese: SUS321
English: 304S12、321920
Germany: X10CrNiTi189

321 stainless steel chemical composition:

C	Mn	P	S	Si	Cr	Ni	Ti
0.08 max	2.0 max	0.045 max	0.030 max	1.0 max	17.0 - 19.0	9.0 - 12.0	5X%C min 0.5 max
0.06	1.2	0.020	0.020	0.5	17.5	9.4	0.48

321 stainless steel mechanical property:

	Typical	Minimum
Tensile Strength, MPa	580	515
Proof Stress (0.2 % offset), MPa	280	205
Elongation (Percent in Lo = 5.65 So)	60	40
Hardness (Brinell)	163	-
Endurance (fatigue) limit, MPa	260	-

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Tags: ASTM A240 321 Austenitic Stainless Steel, ASTM A240 310S Austenitic Stainless Steel, ASTM A240 309S Austenitic Stainless Steel