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ASTM A302 Alloy Steel vs. S45000 Stainless Steel

Both ASTM A302 alloy steel and S45000 stainless steel are iron alloys. There are 31 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is ASTM A302 alloy steel and the bottom bar is S45000 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180 to 190
280 to 410
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 20 to 23
6.8 to 14
Fatigue Strength, MPa 250 to 280
330 to 650
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
76
Shear Strength, MPa 370 to 390
590 to 830
Tensile Strength: Ultimate (UTS), MPa 590 to 620
980 to 1410
Tensile Strength: Yield (Proof), MPa 350 to 390
580 to 1310

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Maximum Temperature: Mechanical, °C 410
840
Melting Completion (Liquidus), °C 1460
1440
Melting Onset (Solidus), °C 1420
1390
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 39 to 51
17
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2 to 7.4
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2 to 8.4
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4 to 3.0
13
Density, g/cm3 7.8 to 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.5 to 1.6
2.8
Embodied Energy, MJ/kg 20 to 21
39
Embodied Water, L/kg 48 to 50
130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 120
94 to 160
Resilience: Unit (Modulus of Resilience), kJ/m3 330 to 410
850 to 4400
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 21 to 22
35 to 50
Strength to Weight: Bending, points 20 to 21
28 to 36
Thermal Diffusivity, mm2/s 10 to 14
4.5
Thermal Shock Resistance, points 17 to 18
33 to 47