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AWS E309H vs. ASTM A302 Alloy Steel

Both AWS E309H and ASTM A302 alloy steel are iron alloys. There are 24 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is AWS E309H and the bottom bar is ASTM A302 alloy steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 34
20 to 23
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 78
73
Tensile Strength: Ultimate (UTS), MPa 620
590 to 620

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Melting Completion (Liquidus), °C 1410
1460
Melting Onset (Solidus), °C 1370
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
39 to 51
Thermal Expansion, µm/m-K 14
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
7.2 to 7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
8.2 to 8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 20
2.4 to 3.0
Density, g/cm3 7.8
7.8 to 7.9
Embodied Carbon, kg CO2/kg material 3.7
1.5 to 1.6
Embodied Energy, MJ/kg 52
20 to 21
Embodied Water, L/kg 180
48 to 50

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 22
21 to 22
Strength to Weight: Bending, points 21
20 to 21
Thermal Diffusivity, mm2/s 4.0
10 to 14
Thermal Shock Resistance, points 16
17 to 18