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
|
learn more:http://www.ice-steels.com/News/ASTM-A240-Grade-321S32100-Stainless-Steel-Additional-Properties.html
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