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ACI-ASTM CN7M Steel vs. EN 1.4658 Stainless Steel

Both ACI-ASTM CN7M steel and EN 1.4658 stainless steel are iron alloys. They have 75% of their average alloy composition in common. There are 30 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 1.4658 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
260
Elastic (Young's, Tensile) Modulus, GPa 200
210
Elongation at Break, % 44
28
Fatigue Strength, MPa 190
530
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 77
81
Tensile Strength: Ultimate (UTS), MPa 480
900
Tensile Strength: Yield (Proof), MPa 200
730

Thermal Properties

Latent Heat of Fusion, J/g 310
300
Maximum Temperature: Corrosion, °C 430
460
Maximum Temperature: Mechanical, °C 1100
1100
Melting Completion (Liquidus), °C 1410
1450
Melting Onset (Solidus), °C 1450
1400
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 21
16
Thermal Expansion, µm/m-K 15
13

Otherwise Unclassified Properties

Base Metal Price, % relative 32
25
Density, g/cm3 8.1
7.8
Embodied Carbon, kg CO2/kg material 5.6
4.5
Embodied Energy, MJ/kg 78
61
Embodied Water, L/kg 210
200

Common Calculations

PREN (Pitting Resistance) 29
49
Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
240
Resilience: Unit (Modulus of Resilience), kJ/m3 110
1280
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 17
32
Strength to Weight: Bending, points 17
26
Thermal Diffusivity, mm2/s 5.6
4.3
Thermal Shock Resistance, points 12
24

Alloy Composition

Carbon (C), % 0 to 0.070
0 to 0.030
Chromium (Cr), % 19 to 22
26 to 29
Cobalt (Co), % 0
0.5 to 2.0
Copper (Cu), % 3.0 to 4.0
0 to 1.0
Iron (Fe), % 37.4 to 48.5
50.9 to 63.7
Manganese (Mn), % 0 to 1.5
0 to 1.5
Molybdenum (Mo), % 2.0 to 3.0
4.0 to 5.0
Nickel (Ni), % 27.5 to 30.5
5.5 to 9.5
Nitrogen (N), % 0
0.3 to 0.5
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 1.5
0 to 0.5
Sulfur (S), % 0 to 0.040
0 to 0.010