ASTM A276 A479 321 stainless steel bar stock steel round bar
Product Description
When the temperature reaches 800-1500 ° F (427-816 ° C) and chromium carbide precipitates, it can still maintain good resistance to intergranular corrosion. Due to the addition of titanium to the composition, 321 alloy can still maintain stability in the case of chromium carbide formation.
Due to its excellent mechanical properties, 321 alloy stainless steel has advantages in working in high temperature environments. Compared with 304 alloy, 321 alloy stainless steel has better ductility and resistance to stress fracture.
Table 1.Composition ranges for 321 grade stainless steel
Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | Other | |
321 | min. max | - 0.08 | 2.00 | 0.75 | 0.045 | 0.030 | 17.0 19.0 | - | 9.0 12.0 | 0.10 | Ti=5(C+N) 0.70 |
Table 2.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 |
Table 3.Physical properties of 321 grade stainless steel in the annealed condition
Grade | Density (kg/m3) | Elastic Modulus (GPa) | Mean Coefficient of Thermal Expansion (μm/m/°C) | Thermal Conductivity (W/m.K) | Specific Heat 0-100°C (J/kg.K) | Electrical Resistivity(nΩ.m) | |||
0-100°C | 0-315°C | 0-538°C | at 100°C | at 500°C | |||||
321 | 8027 | 193 | 16.6 | 17.2 | 18.6 | 16.1 | 22.2 | 500 | 720 |
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