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AISI 312 Stainless Steel vs. ACI-ASTM CN3MN Steel

Both AISI 312 stainless steel and ACI-ASTM CN3MN 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 (3, in this case) are not shown.

For each property being compared, the top bar is AISI 312 stainless steel and the bottom bar is ACI-ASTM CN3MN steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
180
Elastic (Young's, Tensile) Modulus, GPa 200
210
Elongation at Break, % 28
39
Fatigue Strength, MPa 370
250
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 80
80
Tensile Strength: Ultimate (UTS), MPa 780
620
Tensile Strength: Yield (Proof), MPa 510
300

Thermal Properties

Latent Heat of Fusion, J/g 300
310
Maximum Temperature: Corrosion, °C 450
430
Maximum Temperature: Mechanical, °C 1100
1100
Melting Completion (Liquidus), °C 1430
1460
Melting Onset (Solidus), °C 1390
1410
Specific Heat Capacity, J/kg-K 480
460
Thermal Conductivity, W/m-K 16
13
Thermal Expansion, µm/m-K 13
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
2.0

Otherwise Unclassified Properties

Base Metal Price, % relative 17
33
Density, g/cm3 7.7
8.1
Embodied Carbon, kg CO2/kg material 3.4
6.2
Embodied Energy, MJ/kg 48
84
Embodied Water, L/kg 170
200

Common Calculations

PREN (Pitting Resistance) 33
46
Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
200
Resilience: Unit (Modulus of Resilience), kJ/m3 640
210
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 28
21
Strength to Weight: Bending, points 24
20
Thermal Diffusivity, mm2/s 4.3
3.4
Thermal Shock Resistance, points 21
14

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.030
Chromium (Cr), % 24 to 26
20 to 22
Copper (Cu), % 0
0 to 0.75
Iron (Fe), % 62.2 to 69.2
41.4 to 50.3
Manganese (Mn), % 0 to 2.0
0 to 2.0
Molybdenum (Mo), % 1.2 to 2.0
6.0 to 7.0
Nickel (Ni), % 5.5 to 6.5
23.5 to 25.5
Nitrogen (N), % 0.14 to 0.2
0.18 to 0.26
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.010