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EN 1.4062 Stainless Steel vs. SAE-AISI 8640 Steel

Both EN 1.4062 stainless steel and SAE-AISI 8640 steel are iron alloys. They have 76% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is EN 1.4062 stainless steel and the bottom bar is SAE-AISI 8640 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 23 to 34
23
Fatigue Strength, MPa 410 to 420
270
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 79
73
Shear Strength, MPa 510
360
Tensile Strength: Ultimate (UTS), MPa 770 to 800
570
Tensile Strength: Yield (Proof), MPa 530 to 600
380

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 1030
410
Melting Completion (Liquidus), °C 1430
1460
Melting Onset (Solidus), °C 1380
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
39
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 12
2.6
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.6
1.5
Embodied Energy, MJ/kg 37
20
Embodied Water, L/kg 150
50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 170 to 230
120
Resilience: Unit (Modulus of Resilience), kJ/m3 690 to 910
380
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 28 to 29
20
Strength to Weight: Bending, points 24 to 25
20
Thermal Diffusivity, mm2/s 4.0
10
Thermal Shock Resistance, points 21 to 22
17

Alloy Composition

Carbon (C), % 0 to 0.030
0.38 to 0.43
Chromium (Cr), % 21.5 to 24
0.4 to 0.6
Iron (Fe), % 69.3 to 77.3
96.6 to 97.8
Manganese (Mn), % 0 to 2.0
0.75 to 1.0
Molybdenum (Mo), % 0 to 0.45
0.15 to 0.25
Nickel (Ni), % 1.0 to 2.9
0.4 to 0.7
Nitrogen (N), % 0.16 to 0.28
0
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 1.0
0.15 to 0.35
Sulfur (S), % 0 to 0.010
0 to 0.040