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EN 1.6570 Steel vs. SAE-AISI 4137 Steel

Both EN 1.6570 steel and SAE-AISI 4137 steel are iron alloys. They have a very high 98% 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 1.6570 steel and the bottom bar is SAE-AISI 4137 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 270 to 340
170
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11 to 17
23
Fatigue Strength, MPa 500 to 660
240
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Tensile Strength: Ultimate (UTS), MPa 910 to 1130
550
Tensile Strength: Yield (Proof), MPa 760 to 1060
340

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 440
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 40
45
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.7
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 3.9
2.4
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.7
1.5
Embodied Energy, MJ/kg 23
20
Embodied Water, L/kg 56
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120 to 140
110
Resilience: Unit (Modulus of Resilience), kJ/m3 1520 to 3010
310
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 32 to 40
20
Strength to Weight: Bending, points 27 to 31
19
Thermal Diffusivity, mm2/s 11
12
Thermal Shock Resistance, points 27 to 33
18

Alloy Composition

Carbon (C), % 0.28 to 0.35
0.35 to 0.4
Chromium (Cr), % 1.0 to 1.4
0.8 to 1.1
Iron (Fe), % 94 to 96.2
96.9 to 97.9
Manganese (Mn), % 0.6 to 1.0
0.7 to 0.9
Molybdenum (Mo), % 0.3 to 0.5
0.15 to 0.25
Nickel (Ni), % 1.6 to 2.1
0
Phosphorus (P), % 0 to 0.020
0 to 0.035
Silicon (Si), % 0 to 0.6
0.15 to 0.35
Sulfur (S), % 0 to 0.015
0 to 0.040