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321 Stainless Steel Sheet & Coil

Properties

• General
• Chemical
• Physical
• Mechanical

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Stainless Steels Chromium-Nickel-Molybdenum

Types 321 (S32100), 347 (S34700)

Chemical Composition (Represented by ASTM A240 and ASME SA-240)

Element	Maximum Unless Range is Specified
	321	347
Carbon	0.08	0.08
Manganese	2.00	2.00
Phosphorus	0.045	0.045
Sulfur	0.030	0.030
Silicon	0.75	0.75
Chromium	17.00-19.00	17.00-19.00
Nickel	9.00-12.00	9.00-13.00
Columbium+Tantalum	-	10xC min to 1.00 max
Titanium	5x(C+N) min to 0.70 max	-
Nitrogen	0.10	-
Iron	Balance	Balance

Resistance to Corrosion

Types 321 and 347 alloys offer similar resistance to general, overall corrosion as the unstabilized chromium nickel Type 304. Heating for long periods of time in the chromium carbide precipitation range may affect the general resistance of Types 321 and 347 in severe corrosive media.

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We stock only prime metals and alloys that are certified to AMS, MILS and ASTM specifications. Materials are ordered not by just gauge, but to precise decimal thickness.