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EN 1.0070 Steel vs. ASTM A242 HSLA Steel

Both EN 1.0070 steel and ASTM A242 HSLA 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 ASTM A242 HSLA steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210
150
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 9.1
22
Fatigue Strength, MPa 210
230
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 440
310
Tensile Strength: Ultimate (UTS), MPa 740
490
Tensile Strength: Yield (Proof), MPa 350
330

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 400
400
Melting Completion (Liquidus), °C 1470
1460
Melting Onset (Solidus), °C 1430
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 53
52
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 6.8
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 7.8
8.1

Otherwise Unclassified Properties

Base Metal Price, % relative 1.7
1.9
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
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 56
95
Resilience: Unit (Modulus of Resilience), kJ/m3 320
290
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 26
17
Strength to Weight: Bending, points 23
17
Thermal Diffusivity, mm2/s 14
14
Thermal Shock Resistance, points 23
14

Alloy Composition

Carbon (C), % 0
0 to 0.15
Copper (Cu), % 0
0.2 to 0.45
Iron (Fe), % 99.876 to 100
98.2 to 99.8
Manganese (Mn), % 0
0 to 1.0
Nitrogen (N), % 0 to 0.014
0
Phosphorus (P), % 0 to 0.055
0 to 0.15
Sulfur (S), % 0 to 0.055
0 to 0.050