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AISI 321 Stainless Steel vs. ASTM A514 Steel

Both AISI 321 stainless steel and ASTM A514 steel are iron alloys. There are 31 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is AISI 321 stainless steel and the bottom bar is ASTM A514 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 210
240 to 250
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 34 to 50
18 to 21
Fatigue Strength, MPa 220 to 270
470 to 540
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
73
Shear Strength, MPa 420 to 460
490 to 520
Tensile Strength: Ultimate (UTS), MPa 590 to 690
790 to 830
Tensile Strength: Yield (Proof), MPa 220 to 350
690 to 770

Thermal Properties

Latent Heat of Fusion, J/g 290
250 to 260
Maximum Temperature: Mechanical, °C 870
400 to 440
Melting Completion (Liquidus), °C 1430
1460
Melting Onset (Solidus), °C 1400
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 16
37 to 51
Thermal Expansion, µm/m-K 17
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
7.2 to 7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
8.3 to 8.8

Otherwise Unclassified Properties

Base Metal Price, % relative 16
2.3 to 3.8
Density, g/cm3 7.8
7.8 to 7.9
Embodied Carbon, kg CO2/kg material 3.2
1.6 to 1.8
Embodied Energy, MJ/kg 45
21 to 25
Embodied Water, L/kg 140
48 to 57

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190 to 230
140 to 170
Resilience: Unit (Modulus of Resilience), kJ/m3 130 to 310
1280 to 1590
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 21 to 25
28 to 29
Strength to Weight: Bending, points 20 to 22
24 to 25
Thermal Diffusivity, mm2/s 4.1
10 to 14
Thermal Shock Resistance, points 13 to 15
23 to 24