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Warranty: | 30days |
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Material Summary
Grade 321 is the grade of choice for applications in the temperature range of up to about 900°C, combining high strength, resistance to scaling and phase stability with resistance to subsequent aqueous corrosion.
Grade 321H is a modification of 321 with a higher carbon content, to provide improved high temperature strength.
Chemical Composition
Grade |
C |
Mn |
Si |
P |
S |
Cr |
Mo |
321 |
≤0.08 |
≤2.0 |
≤0.75 |
≤0.045 |
≤0.03 |
17.0-19.0 |
- |
321H |
0.04-1.0 |
≤2.0 |
≤0.75 |
≤0.08 |
≤0.03 |
17.0-19.0 |
- |
Grade |
Tensile Strength ksi(MPa) |
Yield Strength ksi(MPa) |
Elongation (% in 50mm) |
Hardness |
|
Rockwell |
Brinell (HB) |
||||
321 |
≥75(515) |
≥30(205) |
≥35 |
≤90HRB |
≤192HBW |
321H |
≥75(515) |
≥30(205) |
≥35 |
≤90HRB |
≤192HBW |
Used primarily for parts requiring excellent corrosion and strong magnetic properties such as:
Boiler tubes and casings
Oil and gas refinery piping
Radiant superheaters
High-pressure steam pipes
Heat exchanger tubes
Cabin heaters
Heavy wall-welded equipment
Aircraft exhaust stacks and collector rings
Chemical production equipment
1.generally export packing
-packed by knitting strips in bundles
2.It is suggested that the pipes OD under 25MM or Less than container shipment are packed by plywood cases, which can protect pipes better.
GOST,ISO9001-2015,AD2000,PED 2014/68/EU,BV Mode II,ISO45001-2018 Certificates.
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