Stainless Steel 321H features

321H stainless steel is a widely used stainless steel, where parts are heated within carbide-precipitation temperature range (800°F-1500°F) and exposed to corrosive atmosphere. 321 stainless steel is similar to 304 stainless steel, but with higher nickel content and stabilized with titanium. Titanium preferentially reacts with carbon in the steel and prevents precipitation of chromium carbides at the grain boundaries, thus preserving corrosion-resistant properties by preventing depletion of chromium near the grain boundaries during exposure within critical temperature range. This grade responds well to hardening by cold working. It has good welding characteristics; and post-weld annealing is not normally required to restore its excellent performance in a wide range of corrosive conditions.

321H, is a titanium stabilized austenitic stainless steel that is known for its general corrosion resistance. This higher carbon version of Type 321 stainless steel offers a wide variety of benefits including:

Excellent resistance oxidation to 1500°F (816°C)
Good low temperature toughness
Comparable corrosion resistance and machinability to Type 304
Readily welded by most standard processes
Very ductile and forms easily

Stainless steel 321H Chemical Composition, %

Grade	C≤	Mn≤	P≤	S≤	Si≤	Cr	Ni	Ti
321H	0.04-0.1	2.0	0.045	0.03	0.75	17.0-19.0	9.0-12.0	4*(C+N)-0.7

Stainless steel 321H Mechanical Properties

Grade	Tensile, min, ksi[MPa]	Yield, min, ksi[MPa]	Elongation, %(min)	Hardness, HB(max)
321H	75【515】	30【205】	40	217

Physical properties

Density: 7.9 g/cm3

Stainless steel 321H Equivalent Grades

STANDARD	WERKSTOFF NR.	UNS	JIS	EN
321H	1.4878	S32109	SUS 321H	X12CrNiTi18-9

ASTM SPECIFICATION

Pipe, SMLS& Welded	Tube, SMLS& Welded	Tube , Seamless	Sheet/Plate	Bar /Rod	Forging /Flange	BW Fittings
ASTM A312	ASTM A269	ASTM A213	ASTM A240	ASTM A276/A479	ASTM A182	ASTM A403