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S32803 Stainless Steel vs. ASTM A302 Alloy Steel

Both S32803 stainless steel and ASTM A302 alloy steel are iron alloys. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is S32803 stainless steel and the bottom bar is ASTM A302 alloy steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210
180 to 190
Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 18
20 to 23
Fatigue Strength, MPa 350
250 to 280
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 81
73
Shear Strength, MPa 420
370 to 390
Tensile Strength: Ultimate (UTS), MPa 680
590 to 620
Tensile Strength: Yield (Proof), MPa 560
350 to 390

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Maximum Temperature: Mechanical, °C 1100
410
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1400
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 16
39 to 51
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
7.2 to 7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
8.2 to 8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 19
2.4 to 3.0
Density, g/cm3 7.7
7.8 to 7.9
Embodied Carbon, kg CO2/kg material 3.7
1.5 to 1.6
Embodied Energy, MJ/kg 53
20 to 21
Embodied Water, L/kg 180
48 to 50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
110 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 760
330 to 410
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 25
21 to 22
Strength to Weight: Bending, points 22
20 to 21
Thermal Diffusivity, mm2/s 4.4
10 to 14
Thermal Shock Resistance, points 22
17 to 18