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ASTM A302 Alloy Steel vs. S33550 Stainless Steel

Both ASTM A302 alloy steel and S33550 stainless 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 ASTM A302 alloy steel and the bottom bar is S33550 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180 to 190
190
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 20 to 23
40
Fatigue Strength, MPa 250 to 280
270
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 73
79
Shear Strength, MPa 370 to 390
470
Tensile Strength: Ultimate (UTS), MPa 590 to 620
680
Tensile Strength: Yield (Proof), MPa 350 to 390
310

Thermal Properties

Latent Heat of Fusion, J/g 250
300
Maximum Temperature: Mechanical, °C 410
1100
Melting Completion (Liquidus), °C 1460
1400
Melting Onset (Solidus), °C 1420
1360
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 39 to 51
15
Thermal Expansion, µm/m-K 13
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2 to 7.4
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2 to 8.4
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4 to 3.0
24
Density, g/cm3 7.8 to 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.5 to 1.6
4.3
Embodied Energy, MJ/kg 20 to 21
61
Embodied Water, L/kg 48 to 50
190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 120
220
Resilience: Unit (Modulus of Resilience), kJ/m3 330 to 410
250
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 21 to 22
24
Strength to Weight: Bending, points 20 to 21
22
Thermal Diffusivity, mm2/s 10 to 14
3.9
Thermal Shock Resistance, points 17 to 18
15