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ASTM A302 Alloy Steel vs. EN 1.4581 Stainless Steel

Both ASTM A302 alloy steel and EN 1.4581 stainless steel are iron alloys. There are 30 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 EN 1.4581 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180 to 190
150
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 20 to 23
28
Fatigue Strength, MPa 250 to 280
150
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
78
Tensile Strength: Ultimate (UTS), MPa 590 to 620
510
Tensile Strength: Yield (Proof), MPa 350 to 390
210

Thermal Properties

Latent Heat of Fusion, J/g 250
300
Maximum Temperature: Mechanical, °C 410
990
Melting Completion (Liquidus), °C 1460
1440
Melting Onset (Solidus), °C 1420
1400
Specific Heat Capacity, J/kg-K 470
470
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
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2 to 8.4
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4 to 3.0
21
Density, g/cm3 7.8 to 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.5 to 1.6
4.2
Embodied Energy, MJ/kg 20 to 21
59
Embodied Water, L/kg 48 to 50
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 120
120
Resilience: Unit (Modulus of Resilience), kJ/m3 330 to 410
110
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 21 to 22
18
Strength to Weight: Bending, points 20 to 21
18
Thermal Diffusivity, mm2/s 10 to 14
3.9
Thermal Shock Resistance, points 17 to 18
12