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ACI-ASTM CN7M Steel vs. N08904 Stainless Steel

Both ACI-ASTM CN7M steel and N08904 stainless steel are iron alloys. They have a moderately high 94% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CN7M steel and the bottom bar is N08904 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
170
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 44
38
Fatigue Strength, MPa 190
200
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
79
Tensile Strength: Ultimate (UTS), MPa 480
540
Tensile Strength: Yield (Proof), MPa 200
240

Thermal Properties

Latent Heat of Fusion, J/g 310
300
Maximum Temperature: Corrosion, °C 430
430
Maximum Temperature: Mechanical, °C 1100
1100
Melting Completion (Liquidus), °C 1410
1440
Melting Onset (Solidus), °C 1450
1390
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 21
12
Thermal Expansion, µm/m-K 15
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.6
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 32
32
Density, g/cm3 8.1
8.1
Embodied Carbon, kg CO2/kg material 5.6
5.8
Embodied Energy, MJ/kg 78
79
Embodied Water, L/kg 210
200

Common Calculations

PREN (Pitting Resistance) 29
37
Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
170
Resilience: Unit (Modulus of Resilience), kJ/m3 110
150
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 17
19
Strength to Weight: Bending, points 17
18
Thermal Diffusivity, mm2/s 5.6
3.1
Thermal Shock Resistance, points 12
12

Alloy Composition

Carbon (C), % 0 to 0.070
0 to 0.020
Chromium (Cr), % 19 to 22
19 to 23
Copper (Cu), % 3.0 to 4.0
1.0 to 2.0
Iron (Fe), % 37.4 to 48.5
38.8 to 53
Manganese (Mn), % 0 to 1.5
0 to 2.0
Molybdenum (Mo), % 2.0 to 3.0
4.0 to 5.0
Nickel (Ni), % 27.5 to 30.5
23 to 28
Nitrogen (N), % 0
0 to 0.1
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 1.5
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.035