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S64512 Stainless Steel vs. SAE-AISI 4140 Steel

Both S64512 stainless steel and SAE-AISI 4140 steel are iron alloys. They have 85% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is S64512 stainless steel and the bottom bar is SAE-AISI 4140 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 330
200 to 310
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 17
11 to 26
Fatigue Strength, MPa 540
360 to 650
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
73
Shear Strength, MPa 700
410 to 660
Tensile Strength: Ultimate (UTS), MPa 1140
690 to 1080
Tensile Strength: Yield (Proof), MPa 890
590 to 990

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Maximum Temperature: Mechanical, °C 750
420
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1420
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 28
43
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.6
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 4.1
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 10
2.4
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.3
1.5
Embodied Energy, MJ/kg 47
20
Embodied Water, L/kg 110
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
74 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 2020
920 to 2590
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 40
25 to 38
Strength to Weight: Bending, points 31
22 to 30
Thermal Diffusivity, mm2/s 7.5
12
Thermal Shock Resistance, points 42
20 to 32

Alloy Composition

Carbon (C), % 0.080 to 0.15
0.38 to 0.43
Chromium (Cr), % 11 to 12.5
0.8 to 1.1
Iron (Fe), % 80.6 to 84.7
96.8 to 97.8
Manganese (Mn), % 0.5 to 0.9
0.75 to 1.0
Molybdenum (Mo), % 1.5 to 2.0
0.15 to 0.25
Nickel (Ni), % 2.0 to 3.0
0
Nitrogen (N), % 0.010 to 0.050
0
Phosphorus (P), % 0 to 0.025
0 to 0.035
Silicon (Si), % 0 to 0.35
0.15 to 0.35
Sulfur (S), % 0 to 0.025
0 to 0.040
Vanadium (V), % 0.25 to 0.4
0