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EN 1.0070 Steel vs. EN 1.0031 Steel

Both EN 1.0070 steel and EN 1.0031 steel are iron alloys. Their average alloy composition is basically identical.

For each property being compared, the top bar is EN 1.0070 steel and the bottom bar is EN 1.0031 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210
89
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 9.1
28
Fatigue Strength, MPa 210
160
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 440
200
Tensile Strength: Ultimate (UTS), MPa 740
310
Tensile Strength: Yield (Proof), MPa 350
210

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 400
400
Melting Completion (Liquidus), °C 1470
1470
Melting Onset (Solidus), °C 1430
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 53
53
Thermal Expansion, µm/m-K 12
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 6.8
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 7.8
8.0

Otherwise Unclassified Properties

Base Metal Price, % relative 1.7
1.8
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 1.4
1.4
Embodied Energy, MJ/kg 18
18
Embodied Water, L/kg 45
45

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 56
78
Resilience: Unit (Modulus of Resilience), kJ/m3 320
120
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 26
11
Strength to Weight: Bending, points 23
13
Thermal Diffusivity, mm2/s 14
14
Thermal Shock Resistance, points 23
9.8

Alloy Composition

Carbon (C), % 0
0 to 0.1
Iron (Fe), % 99.876 to 100
98.8 to 100
Manganese (Mn), % 0
0 to 0.7
Nitrogen (N), % 0 to 0.014
0
Phosphorus (P), % 0 to 0.055
0 to 0.045
Silicon (Si), % 0
0 to 0.35
Sulfur (S), % 0 to 0.055
0 to 0.045