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ACI-ASTM CN7M Steel vs. S38815 Stainless Steel

Both ACI-ASTM CN7M steel and S38815 stainless steel are iron alloys. They have 76% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CN7M steel and the bottom bar is S38815 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
190
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 44
34
Fatigue Strength, MPa 190
230
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
74
Tensile Strength: Ultimate (UTS), MPa 480
610
Tensile Strength: Yield (Proof), MPa 200
290

Thermal Properties

Latent Heat of Fusion, J/g 310
370
Maximum Temperature: Corrosion, °C 430
400
Maximum Temperature: Mechanical, °C 1100
860
Melting Completion (Liquidus), °C 1410
1360
Melting Onset (Solidus), °C 1450
1310
Specific Heat Capacity, J/kg-K 470
500
Thermal Expansion, µm/m-K 15
15

Otherwise Unclassified Properties

Base Metal Price, % relative 32
19
Density, g/cm3 8.1
7.5
Embodied Carbon, kg CO2/kg material 5.6
3.8
Embodied Energy, MJ/kg 78
54
Embodied Water, L/kg 210
140

Common Calculations

PREN (Pitting Resistance) 29
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
170
Resilience: Unit (Modulus of Resilience), kJ/m3 110
220
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 17
22
Strength to Weight: Bending, points 17
21
Thermal Shock Resistance, points 12
15

Alloy Composition

Aluminum (Al), % 0
0 to 0.3
Carbon (C), % 0 to 0.070
0 to 0.030
Chromium (Cr), % 19 to 22
13 to 15
Copper (Cu), % 3.0 to 4.0
0.75 to 1.5
Iron (Fe), % 37.4 to 48.5
56.1 to 67
Manganese (Mn), % 0 to 1.5
0 to 2.0
Molybdenum (Mo), % 2.0 to 3.0
0.75 to 1.5
Nickel (Ni), % 27.5 to 30.5
13 to 17
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.5
5.5 to 6.5
Sulfur (S), % 0 to 0.040
0 to 0.020