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ASTM A387 Grade 9 Steel vs. SAE-AISI D7 Steel

Both ASTM A387 grade 9 steel and SAE-AISI D7 steel are iron alloys. They have 90% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (10, 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 SAE-AISI D7 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 75
73
Tensile Strength: Ultimate (UTS), MPa 500 to 600
800 to 2120

Thermal Properties

Latent Heat of Fusion, J/g 270
270
Melting Completion (Liquidus), °C 1460
1440
Melting Onset (Solidus), °C 1410
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 26
27
Thermal Expansion, µm/m-K 13
11

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
10
Density, g/cm3 7.8
7.6
Embodied Carbon, kg CO2/kg material 2.1
11
Embodied Energy, MJ/kg 28
180
Embodied Water, L/kg 87
130

Common Calculations

PREN (Pitting Resistance) 12
16
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 18 to 21
29 to 78
Strength to Weight: Bending, points 18 to 20
25 to 48
Thermal Diffusivity, mm2/s 6.9
7.4
Thermal Shock Resistance, points 14 to 17
27 to 72

Alloy Composition

Carbon (C), % 0 to 0.15
2.2 to 2.5
Chromium (Cr), % 8.0 to 10
11.5 to 13.5
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 87.1 to 90.8
76.6 to 81.9
Manganese (Mn), % 0.3 to 0.6
0 to 0.6
Molybdenum (Mo), % 0.9 to 1.1
0.7 to 1.2
Nickel (Ni), % 0
0 to 0.3
Phosphorus (P), % 0 to 0.025
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 0.6
Sulfur (S), % 0 to 0.025
0 to 0.030
Vanadium (V), % 0 to 0.040
3.8 to 4.4

Comparable Variants