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SAE-AISI D4 Steel vs. SAE-AISI D7 Steel

Both SAE-AISI D4 steel and SAE-AISI D7 steel are iron alloys. They have a very high 96% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI D4 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 74
73
Tensile Strength: Ultimate (UTS), MPa 760 to 2060
800 to 2120

Thermal Properties

Latent Heat of Fusion, J/g 270
270
Melting Completion (Liquidus), °C 1430
1440
Melting Onset (Solidus), °C 1380
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 31
27
Thermal Expansion, µm/m-K 12
11

Otherwise Unclassified Properties

Base Metal Price, % relative 8.0
10
Density, g/cm3 7.7
7.6
Embodied Carbon, kg CO2/kg material 3.3
11
Embodied Energy, MJ/kg 49
180
Embodied Water, L/kg 100
130

Common Calculations

PREN (Pitting Resistance) 15
16
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 27 to 75
29 to 78
Strength to Weight: Bending, points 24 to 47
25 to 48
Thermal Diffusivity, mm2/s 8.3
7.4
Thermal Shock Resistance, points 23 to 63
27 to 72

Alloy Composition

Carbon (C), % 2.1 to 2.4
2.2 to 2.5
Chromium (Cr), % 11 to 13
11.5 to 13.5
Copper (Cu), % 0 to 0.25
0 to 0.25
Iron (Fe), % 80.6 to 86.3
76.6 to 81.9
Manganese (Mn), % 0 to 0.6
0 to 0.6
Molybdenum (Mo), % 0.7 to 1.2
0.7 to 1.2
Nickel (Ni), % 0 to 0.3
0 to 0.3
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0 to 0.6
0 to 0.6
Sulfur (S), % 0 to 0.030
0 to 0.030
Vanadium (V), % 0 to 1.0
3.8 to 4.4

Comparable Variants