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AISI 431 Stainless Steel vs. ACI-ASTM CK35MN Steel

Both AISI 431 stainless steel and ACI-ASTM CK35MN 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 (2, in this case) are not shown.

For each property being compared, the top bar is AISI 431 stainless steel and the bottom bar is ACI-ASTM CK35MN steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
190
Elastic (Young's, Tensile) Modulus, GPa 200
210
Elongation at Break, % 15 to 17
40
Fatigue Strength, MPa 430 to 610
270
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
81
Tensile Strength: Ultimate (UTS), MPa 890 to 1380
650
Tensile Strength: Yield (Proof), MPa 710 to 1040
310

Thermal Properties

Latent Heat of Fusion, J/g 280
310
Maximum Temperature: Corrosion, °C 400
440
Maximum Temperature: Mechanical, °C 850
1100
Melting Completion (Liquidus), °C 1510
1460
Melting Onset (Solidus), °C 1450
1410
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 26
12
Thermal Expansion, µm/m-K 12
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.6
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 3.0
2.1

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
31
Density, g/cm3 7.7
8.0
Embodied Carbon, kg CO2/kg material 2.2
5.9
Embodied Energy, MJ/kg 31
81
Embodied Water, L/kg 120
210

Common Calculations

PREN (Pitting Resistance) 16
48
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 180
210
Resilience: Unit (Modulus of Resilience), kJ/m3 1270 to 2770
240
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 32 to 50
22
Strength to Weight: Bending, points 27 to 36
21
Thermal Diffusivity, mm2/s 7.0
3.3
Thermal Shock Resistance, points 28 to 43
14

Alloy Composition

Carbon (C), % 0 to 0.2
0 to 0.035
Chromium (Cr), % 15 to 17
22 to 24
Copper (Cu), % 0
0 to 0.4
Iron (Fe), % 78.2 to 83.8
43.4 to 51.8
Manganese (Mn), % 0 to 1.0
0 to 2.0
Molybdenum (Mo), % 0
6.0 to 6.8
Nickel (Ni), % 1.3 to 2.5
20 to 22
Nitrogen (N), % 0
0.21 to 0.32
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.020