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SAE-AISI D7 Steel vs. AISI 440B Stainless Steel

Both SAE-AISI D7 steel and AISI 440B stainless steel are iron alloys. They have a moderately high 94% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI D7 steel and the bottom bar is AISI 440B stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 73
77
Tensile Strength: Ultimate (UTS), MPa 800 to 2120
740 to 1930

Thermal Properties

Latent Heat of Fusion, J/g 270
280
Melting Completion (Liquidus), °C 1440
1480
Melting Onset (Solidus), °C 1400
1370
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 27
23
Thermal Expansion, µm/m-K 11
10

Otherwise Unclassified Properties

Base Metal Price, % relative 10
9.0
Density, g/cm3 7.6
7.7
Embodied Carbon, kg CO2/kg material 11
2.2
Embodied Energy, MJ/kg 180
31
Embodied Water, L/kg 130
120

Common Calculations

PREN (Pitting Resistance) 16
18
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 29 to 78
27 to 70
Strength to Weight: Bending, points 25 to 48
24 to 45
Thermal Diffusivity, mm2/s 7.4
6.1
Thermal Shock Resistance, points 27 to 72
27 to 70

Alloy Composition

Carbon (C), % 2.2 to 2.5
0.75 to 1.0
Chromium (Cr), % 11.5 to 13.5
16 to 18
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 76.6 to 81.9
78.2 to 83.3
Manganese (Mn), % 0 to 0.6
0 to 1.0
Molybdenum (Mo), % 0.7 to 1.2
0 to 0.75
Nickel (Ni), % 0 to 0.3
0
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0 to 0.6
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.015
Vanadium (V), % 3.8 to 4.4
0

Comparable Variants