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ASTM A240 Grade 321(S32100) Stainless Steel Additional Properties
Type 321 is an austenitic chromium-nickel stainless steel containing Titanium. 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.
Chemistry Typical of ASTM A240 Grade 321
Carbon: 0.08 max
Manganese: 2.00 max
Silicon: 0.75 max
Chromium: 17.00-19.00
Nickel: 9.00-12.00
Molybdenum: 0.75 max
Phosphorus: 0.045 max
Sulfur: .030 max
Copper: 0.75 max
Nitrogen: .010 max
Titanium: 5x (Carbon + Nitrogen) min-0.70 max
Iron: Balance
Mechanical properties of 321 grade stainless steel
Grade |
Tensile Strength (MPa) min |
Yield Strength 0.2% Proof (MPa) min |
Elongation (% in 50mm) min |
Hardness |
|
|
Rockwell B (HR B) max |
Brinell (HB) max |
||||
|
321 |
515 |
205 |
40 |
95 |
217 |
|
321H |
515 |
205 |
40 |
95 |
217 |
|
347 |
515 |
205 |
40 |
92 |
201 |
Possible alternative grades to 321 grade stainless steel
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 mild "high temperature" environment is present… up to about 600°C. |
|
304H |
Only 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 |
The temperature of the operating environment is up to about 1150°C- too high for 321 or 321H. |
Welcome new and old customers come to visit Katalor mill and company in china, we are professional ASTM A240 Grade 321(S32100) Stainless Steel supplier and exporter for many years. If you cooperate with us, I assure you that we definitely won’t disappoint you.