Jindutt Steel website - Alloy -321/321H

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Alloy -321/321H

• Products • Alloy Steel • Alloy -321/321H

AVAILABILITY
Seamless Pipe 1/2" - 16"
Weld Pipe 6" - 12"
Bar 1" - 12"
Butt-Weld Flanges 1/2" - 8"
Flanges 1/2" - 8"

SPECIFICATI0NS
ASTM
A312, A403, A182, A479, A276
ASME
SA312, SA403, SA182, SA479, SA276

DESCRIPTION
These titanium bearing stainless steels are stabilized against carbide precipitation and designed for operation within the damaging temperature range where carbide precipitation develops. In this type of steel, the carbon combines preferentially with titanium to form a harmless titanium carbide, leaving the chromium in solution to maintain full corrosion resistance. Type 321 is basic type 304 modified by adding titanium in an amount at least 5 times the carbon plus nitrogen contents.

DESIGN FEATURES
Immune to intergranular corrosion when
heated within the carbide precipitation range.
Titanium addition eliminates the formation of
chromium carbides at the grain boundaries by
tying up the carbon and nitrogen as titanium
carbides or nitrides.
Better high temperature properties than 304 or
304L. Generally used for parts which are intermittently heated up to 1500 deg.F. For
continuous service the alloy is good to 1650 deg.F.
May be susceptible to chloride stress cracking.
Excellent weldability in field.
Type 321 H has high carbon (.04 - 10) for better high temperature creep properties.

TYPICAL APPLICATIONS
High temperature chemical process heat exchanger tubes Refineries High temperature steam service

TENSILE REQUIREMENTS
Tensile Strength (KSI) 75
Yield Strength (KSI) 30

KSI can be converted to MPA (Megapascals) by multiplying by 6.89

Chemical Composition %

C	Cr	Mn	Ni	P	S	Si	Ti
Max		Max		Max	Max	Max
0.08	17.0-20.0	2.0	9.0-13.0	0.04	0.30	0.75	Trace

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