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ACI-ASTM CN7M Steel vs. AISI 316 Stainless Steel

Both ACI-ASTM CN7M steel and AISI 316 stainless steel are iron alloys. They have 76% 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 AISI 316 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
160 to 360
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 44
8.0 to 55
Fatigue Strength, MPa 190
210 to 430
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
78
Tensile Strength: Ultimate (UTS), MPa 480
520 to 1180
Tensile Strength: Yield (Proof), MPa 200
230 to 850

Thermal Properties

Latent Heat of Fusion, J/g 310
290
Maximum Temperature: Corrosion, °C 430
410
Maximum Temperature: Mechanical, °C 1100
590
Melting Completion (Liquidus), °C 1410
1400
Melting Onset (Solidus), °C 1450
1380
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 21
15
Thermal Expansion, µm/m-K 15
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.6
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 32
19
Density, g/cm3 8.1
7.9
Embodied Carbon, kg CO2/kg material 5.6
3.9
Embodied Energy, MJ/kg 78
53
Embodied Water, L/kg 210
150

Common Calculations

PREN (Pitting Resistance) 29
26
Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
85 to 260
Resilience: Unit (Modulus of Resilience), kJ/m3 110
130 to 1820
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 17
18 to 41
Strength to Weight: Bending, points 17
18 to 31
Thermal Diffusivity, mm2/s 5.6
4.1
Thermal Shock Resistance, points 12
11 to 26

Alloy Composition

Carbon (C), % 0 to 0.070
0 to 0.080
Chromium (Cr), % 19 to 22
16 to 18
Copper (Cu), % 3.0 to 4.0
0
Iron (Fe), % 37.4 to 48.5
62 to 72
Manganese (Mn), % 0 to 1.5
0 to 2.0
Molybdenum (Mo), % 2.0 to 3.0
2.0 to 3.0
Nickel (Ni), % 27.5 to 30.5
10 to 14
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 0.75
Sulfur (S), % 0 to 0.040
0 to 0.030