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ASTM A387 Grade 9 Steel vs. AWS ENiCrMo-4

ASTM A387 grade 9 steel belongs to the iron alloys classification, while AWS ENiCrMo-4 belongs to the nickel alloys. There are 20 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is ASTM A387 grade 9 steel and the bottom bar is AWS ENiCrMo-4.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
220
Elongation at Break, % 20 to 21
28
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
84
Tensile Strength: Ultimate (UTS), MPa 500 to 600
790

Thermal Properties

Latent Heat of Fusion, J/g 270
320
Melting Completion (Liquidus), °C 1460
1590
Melting Onset (Solidus), °C 1410
1530
Specific Heat Capacity, J/kg-K 470
410
Thermal Expansion, µm/m-K 13
12

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
70
Density, g/cm3 7.8
9.0
Embodied Carbon, kg CO2/kg material 2.1
13
Embodied Energy, MJ/kg 28
170
Embodied Water, L/kg 87
280

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
22
Strength to Weight: Axial, points 18 to 21
24
Strength to Weight: Bending, points 18 to 20
21
Thermal Shock Resistance, points 14 to 17
22

Alloy Composition

Carbon (C), % 0 to 0.15
0 to 0.020
Chromium (Cr), % 8.0 to 10
14.5 to 16.5
Cobalt (Co), % 0
0 to 2.5
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 87.1 to 90.8
4.0 to 7.0
Manganese (Mn), % 0.3 to 0.6
0 to 1.0
Molybdenum (Mo), % 0.9 to 1.1
15 to 17
Nickel (Ni), % 0
49.9 to 63.5
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 0.2
Sulfur (S), % 0 to 0.025
0 to 0.030
Tungsten (W), % 0
3.0 to 4.5
Vanadium (V), % 0 to 0.040
0 to 0.35
Residuals, % 0
0 to 0.5