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SAE-AISI 9254 Steel vs. AWS ER70S-A1

Both SAE-AISI 9254 steel and AWS ER70S-A1 are iron alloys. They have a very high 98% of their average alloy composition in common. There are 27 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 SAE-AISI 9254 steel and the bottom bar is AWS ER70S-A1.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 20
22
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 72
73
Tensile Strength: Ultimate (UTS), MPa 660
590
Tensile Strength: Yield (Proof), MPa 410
450

Thermal Properties

Latent Heat of Fusion, J/g 270
260
Melting Completion (Liquidus), °C 1440
1460
Melting Onset (Solidus), °C 1400
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 46
50
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 2.2
2.5
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 1.5
1.5
Embodied Energy, MJ/kg 20
20
Embodied Water, L/kg 49
48

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
120
Resilience: Unit (Modulus of Resilience), kJ/m3 450
540
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 24
21
Strength to Weight: Bending, points 22
20
Thermal Diffusivity, mm2/s 12
14
Thermal Shock Resistance, points 20
17

Alloy Composition

Carbon (C), % 0.51 to 0.59
0 to 0.12
Chromium (Cr), % 0.6 to 0.8
0
Copper (Cu), % 0
0 to 0.35
Iron (Fe), % 96.1 to 97.1
96.1 to 99.3
Manganese (Mn), % 0.6 to 0.8
0 to 1.3
Molybdenum (Mo), % 0
0.4 to 0.65
Nickel (Ni), % 0
0 to 0.2
Phosphorus (P), % 0 to 0.035
0 to 0.025
Silicon (Si), % 1.2 to 1.6
0.3 to 0.7
Sulfur (S), % 0 to 0.040
0 to 0.025
Residuals, % 0
0 to 0.5