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ASTM A387 Grade 12 Steel vs. SAE-AISI S1 Steel

Both ASTM A387 grade 12 steel and SAE-AISI S1 steel are iron alloys. They have a very high 96% of their average alloy composition in common. 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 ASTM A387 grade 12 steel and the bottom bar is SAE-AISI S1 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Tensile Strength: Ultimate (UTS), MPa 470 to 520
690 to 1840

Thermal Properties

Latent Heat of Fusion, J/g 250
260
Melting Completion (Liquidus), °C 1470
1500
Melting Onset (Solidus), °C 1420
1450
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 44
41
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
7.7
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 2.8
8.0
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 1.6
2.6
Embodied Energy, MJ/kg 21
37
Embodied Water, L/kg 51
56

Common Calculations

PREN (Pitting Resistance) 2.7
5.9
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 16 to 18
24 to 64
Strength to Weight: Bending, points 17 to 18
22 to 42
Thermal Diffusivity, mm2/s 12
11
Thermal Shock Resistance, points 14 to 15
21 to 56

Alloy Composition

Carbon (C), % 0.050 to 0.17
0.4 to 0.55
Chromium (Cr), % 0.8 to 1.2
1.0 to 1.8
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 97 to 98.2
91.6 to 96.7
Manganese (Mn), % 0.4 to 0.65
0.1 to 0.4
Molybdenum (Mo), % 0.45 to 0.6
0 to 0.5
Nickel (Ni), % 0
0 to 0.3
Phosphorus (P), % 0 to 0.025
0 to 0.030
Silicon (Si), % 0.15 to 0.4
0.15 to 1.2
Sulfur (S), % 0 to 0.025
0 to 0.030
Tungsten (W), % 0
1.5 to 3.0
Vanadium (V), % 0
0.15 to 0.3

Comparable Variants