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ACI-ASTM CN7MS Steel vs. AISI 204 Stainless Steel

Both ACI-ASTM CN7MS steel and AISI 204 stainless steel are iron alloys. They have 69% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CN7MS steel and the bottom bar is AISI 204 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
210 to 330
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 39
23 to 39
Fatigue Strength, MPa 200
320 to 720
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Tensile Strength: Ultimate (UTS), MPa 540
730 to 1100
Tensile Strength: Yield (Proof), MPa 230
380 to 1080

Thermal Properties

Latent Heat of Fusion, J/g 340
280
Maximum Temperature: Corrosion, °C 420
410
Maximum Temperature: Mechanical, °C 1040
850
Melting Completion (Liquidus), °C 1400
1410
Melting Onset (Solidus), °C 1350
1370
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 12
15
Thermal Expansion, µm/m-K 16
17

Otherwise Unclassified Properties

Base Metal Price, % relative 28
10
Density, g/cm3 7.9
7.7
Embodied Carbon, kg CO2/kg material 5.1
2.4
Embodied Energy, MJ/kg 71
35
Embodied Water, L/kg 180
130

Common Calculations

PREN (Pitting Resistance) 28
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
240 to 250
Resilience: Unit (Modulus of Resilience), kJ/m3 140
360 to 2940
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 19
27 to 40
Strength to Weight: Bending, points 19
24 to 31
Thermal Diffusivity, mm2/s 3.2
4.1
Thermal Shock Resistance, points 13
16 to 24

Alloy Composition

Carbon (C), % 0 to 0.070
0 to 0.030
Chromium (Cr), % 18 to 20
15 to 17
Copper (Cu), % 1.5 to 2.0
0
Iron (Fe), % 45.4 to 53.5
69.6 to 76.4
Manganese (Mn), % 0 to 1.0
7.0 to 9.0
Molybdenum (Mo), % 2.5 to 3.0
0
Nickel (Ni), % 22 to 25
1.5 to 3.0
Nitrogen (N), % 0
0.15 to 0.3
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 2.5 to 3.5
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030