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ACI-ASTM CN7M Steel vs. EN 1.6958 Steel

Both ACI-ASTM CN7M steel and EN 1.6958 steel are iron alloys. They have 49% 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 ACI-ASTM CN7M steel and the bottom bar is EN 1.6958 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
340
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 44
16
Fatigue Strength, MPa 190
700
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
73
Tensile Strength: Ultimate (UTS), MPa 480
1140
Tensile Strength: Yield (Proof), MPa 200
1070

Thermal Properties

Latent Heat of Fusion, J/g 310
250
Maximum Temperature: Mechanical, °C 1100
450
Melting Completion (Liquidus), °C 1410
1460
Melting Onset (Solidus), °C 1450
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 21
47
Thermal Expansion, µm/m-K 15
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.6
7.9
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
9.1

Otherwise Unclassified Properties

Base Metal Price, % relative 32
5.0
Density, g/cm3 8.1
7.9
Embodied Carbon, kg CO2/kg material 5.6
2.0
Embodied Energy, MJ/kg 78
27
Embodied Water, L/kg 210
60

Common Calculations

PREN (Pitting Resistance) 29
2.9
Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
180
Resilience: Unit (Modulus of Resilience), kJ/m3 110
3050
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 17
40
Strength to Weight: Bending, points 17
31
Thermal Diffusivity, mm2/s 5.6
13
Thermal Shock Resistance, points 12
39

Alloy Composition

Aluminum (Al), % 0
0.0050 to 0.050
Carbon (C), % 0 to 0.070
0.25 to 0.3
Chromium (Cr), % 19 to 22
1.2 to 1.7
Copper (Cu), % 3.0 to 4.0
0
Iron (Fe), % 37.4 to 48.5
92.6 to 94.5
Manganese (Mn), % 0 to 1.5
0.2 to 0.5
Molybdenum (Mo), % 2.0 to 3.0
0.35 to 0.55
Nickel (Ni), % 27.5 to 30.5
3.3 to 3.8
Phosphorus (P), % 0 to 0.040
0 to 0.020
Silicon (Si), % 0 to 1.5
0.15 to 0.3
Sulfur (S), % 0 to 0.040
0 to 0.015
Vanadium (V), % 0
0 to 0.12