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321 stainless steel is a titanium stabilized grade specifically designed for service in the 1000-1600°F temperature range. For optimal performance at temperatures up to 1600°F, a stabilizing treatment at 1550-1650°F with air cooling is recommended to provide maximum resistance to intergranular corrosion and polythionic acid stress corrosion cracking.
This grade offers excellent weldability using all common methods including submerged arc welding. Recommended weld fillers include AWS ER347 bare wire and E347 covered electrodes. With a machinability rating of 45% relative to AISI B1112, 321 stainless steel provides similar machining characteristics to 304 stainless steel.
Available Product Forms: Sheet, Plate, Coil, Strip, Wire, Pipe, Tube, Bar, Profile, Round, Flat, Square, Hexagonal
Specifications & Certifications
Grade 321/321H
ASTM A240, ASME SA240, BS EN 10028-7, BS EN 10088-2 and BS EN 10088-4
EN 10088/2, EN 10088/4 and CE Marking
NACE MR 0175/ISO 15156 Certification
Typical Applications
Aircraft piston engine manifolds
Expansion joints
Firearms production
Thermal oxidizers
Refinery equipment
High temperature chemical process equipment
Chemical Composition (wt%)
Element
321
Carbon
0.08
Chromium
17.0-19.0
Nickel
9.0-12.0
Manganese
2.00
Silicon
0.75
Nitrogen
0.10
Phosphorus
0.045
Sulfur
0.030
Titanium
5(C+N) min / 0.70 max
* Maximum, unless range is indicated
Mechanical Properties
Property
321
Yield Strength, min. (ksi)
30
Tensile Strength, min. (ksi)
75
Elongation, min. (%)
40
Hardness, max. (Rb)
95
Grade Specification Comparison
Grade
UNS No
Old British
Euronorm
Swedish SS
Japanese JIS
321
S32100
321S31
1.4541
2337
SUS 321
321H
S32109
321S51
1.4878
-
SUS 321H
347
S34700
347S31
1.4550
2338
SUS 347
Possible Alternative Grades
Grade
Why it might be chosen instead of 321
304L
The requirement is for resistance to intergranular corrosion, not for high-temperature strength
3CR12
Only a mild "high temperature" environment is present… up to about 600°C
304H
Only a mild "high temperature" environment is present… up to about 800°C
310
The temperature of the operating environment is up to about 1100°C - too high for 321 or 321H
S30815 (253MA)
The temperature of the operating environment is up to about 1150°C - too high for 321 or 321H
Product Images
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer
Year Established:
2012
Total Annual:
500,000,000-800,000,000
Employee Number:
100~200
Ecer Certification:
Verified Supplier
Company Overview :
The company has an indoor warehouse of 5000 square meters and an open warehouse of 4000 square meters, which can fully meet the temporary turnover and phased storage of customers' steel pipe reservation.
The subordinate processing plant has 6 sets of medium frequency h... Company Overview :
The company has an indoor warehouse of 5000 square meters and an open warehouse of 4000 square meters, which can fully meet the temporary turnover and phased storage of customers' steel pipe reservation.
The subordinate processing plant has 6 sets of medium frequency h...