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AISI 201LN Stainless Steel vs. ACI-ASTM CN7MS Steel

Both AISI 201LN stainless steel and ACI-ASTM CN7MS steel are iron alloys. They have 72% 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 AISI 201LN stainless steel and the bottom bar is ACI-ASTM CN7MS steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 320
160
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 25 to 51
39
Fatigue Strength, MPa 340 to 540
200
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Tensile Strength: Ultimate (UTS), MPa 740 to 1060
540
Tensile Strength: Yield (Proof), MPa 350 to 770
230

Thermal Properties

Latent Heat of Fusion, J/g 280
340
Maximum Temperature: Corrosion, °C 410
420
Maximum Temperature: Mechanical, °C 880
1040
Melting Completion (Liquidus), °C 1410
1400
Melting Onset (Solidus), °C 1370
1350
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
12
Thermal Expansion, µm/m-K 17
16

Otherwise Unclassified Properties

Base Metal Price, % relative 12
28
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 2.6
5.1
Embodied Energy, MJ/kg 38
71
Embodied Water, L/kg 140
180

Common Calculations

PREN (Pitting Resistance) 20
28
Resilience: Ultimate (Unit Rupture Work), MJ/m3 230 to 310
170
Resilience: Unit (Modulus of Resilience), kJ/m3 310 to 1520
140
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 27 to 38
19
Strength to Weight: Bending, points 24 to 30
19
Thermal Diffusivity, mm2/s 4.0
3.2
Thermal Shock Resistance, points 16 to 23
13

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.070
Chromium (Cr), % 16 to 17.5
18 to 20
Copper (Cu), % 0 to 1.0
1.5 to 2.0
Iron (Fe), % 67.9 to 73.5
45.4 to 53.5
Manganese (Mn), % 6.4 to 7.5
0 to 1.0
Molybdenum (Mo), % 0
2.5 to 3.0
Nickel (Ni), % 4.0 to 5.0
22 to 25
Nitrogen (N), % 0.1 to 0.25
0
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 0.75
2.5 to 3.5
Sulfur (S), % 0 to 0.015
0 to 0.030