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ASTM A302 Alloy Steel vs. EN 1.6781 Steel

Both ASTM A302 alloy steel and EN 1.6781 steel are iron alloys. There are 30 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 ASTM A302 alloy steel and the bottom bar is EN 1.6781 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180 to 190
250
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 20 to 23
17
Fatigue Strength, MPa 250 to 280
450
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Tensile Strength: Ultimate (UTS), MPa 590 to 620
830
Tensile Strength: Yield (Proof), MPa 350 to 390
680

Thermal Properties

Latent Heat of Fusion, J/g 250
260
Maximum Temperature: Mechanical, °C 410
450
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1420
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 39 to 51
44
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2 to 7.4
7.9
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2 to 8.4
9.1

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4 to 3.0
5.0
Density, g/cm3 7.8 to 7.9
7.9
Embodied Carbon, kg CO2/kg material 1.5 to 1.6
1.9
Embodied Energy, MJ/kg 20 to 21
25
Embodied Water, L/kg 48 to 50
60

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 120
130
Resilience: Unit (Modulus of Resilience), kJ/m3 330 to 410
1220
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 21 to 22
29
Strength to Weight: Bending, points 20 to 21
25
Thermal Diffusivity, mm2/s 10 to 14
12
Thermal Shock Resistance, points 17 to 18
24