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ACI-ASTM CN7M Steel vs. S15500 Stainless Steel

Both ACI-ASTM CN7M steel and S15500 stainless steel are iron alloys. They have 67% of their average alloy composition in common. There are 32 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 S15500 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
290 to 430
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 44
6.8 to 16
Fatigue Strength, MPa 190
350 to 650
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
75
Tensile Strength: Ultimate (UTS), MPa 480
890 to 1490
Tensile Strength: Yield (Proof), MPa 200
590 to 1310

Thermal Properties

Latent Heat of Fusion, J/g 310
280
Maximum Temperature: Corrosion, °C 430
440
Maximum Temperature: Mechanical, °C 1100
820
Melting Completion (Liquidus), °C 1410
1430
Melting Onset (Solidus), °C 1450
1380
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 21
17
Thermal Expansion, µm/m-K 15
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.6
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 32
13
Density, g/cm3 8.1
7.8
Embodied Carbon, kg CO2/kg material 5.6
2.7
Embodied Energy, MJ/kg 78
39
Embodied Water, L/kg 210
130

Common Calculations

PREN (Pitting Resistance) 29
15
Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
98 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 110
890 to 4460
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 17
32 to 53
Strength to Weight: Bending, points 17
26 to 37
Thermal Diffusivity, mm2/s 5.6
4.6
Thermal Shock Resistance, points 12
30 to 50

Alloy Composition

Carbon (C), % 0 to 0.070
0 to 0.070
Chromium (Cr), % 19 to 22
14 to 15.5
Copper (Cu), % 3.0 to 4.0
2.5 to 4.5
Iron (Fe), % 37.4 to 48.5
71.9 to 79.9
Manganese (Mn), % 0 to 1.5
0 to 1.0
Molybdenum (Mo), % 2.0 to 3.0
0
Nickel (Ni), % 27.5 to 30.5
3.5 to 5.5
Niobium (Nb), % 0
0.15 to 0.45
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.5
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.030