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ACI-ASTM CK35MN Steel vs. AISI 440A Stainless Steel

Both ACI-ASTM CK35MN steel and AISI 440A stainless steel are iron alloys. They have 66% 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 CK35MN steel and the bottom bar is AISI 440A stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 40
5.0 to 20
Fatigue Strength, MPa 270
270 to 790
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 81
77
Tensile Strength: Ultimate (UTS), MPa 650
730 to 1790
Tensile Strength: Yield (Proof), MPa 310
420 to 1650

Thermal Properties

Latent Heat of Fusion, J/g 310
280
Maximum Temperature: Corrosion, °C 440
400
Maximum Temperature: Mechanical, °C 1100
760
Melting Completion (Liquidus), °C 1460
1480
Melting Onset (Solidus), °C 1410
1370
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 12
23
Thermal Expansion, µm/m-K 16
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.9
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
2.9

Otherwise Unclassified Properties

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

Common Calculations

PREN (Pitting Resistance) 48
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 210
87 to 120
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 22
26 to 65
Strength to Weight: Bending, points 21
23 to 43
Thermal Diffusivity, mm2/s 3.3
6.2
Thermal Shock Resistance, points 14
26 to 65

Alloy Composition

Carbon (C), % 0 to 0.035
0.6 to 0.75
Chromium (Cr), % 22 to 24
16 to 18
Copper (Cu), % 0 to 0.4
0
Iron (Fe), % 43.4 to 51.8
78.4 to 83.4
Manganese (Mn), % 0 to 2.0
0 to 1.0
Molybdenum (Mo), % 6.0 to 6.8
0 to 0.75
Nickel (Ni), % 20 to 22
0
Nitrogen (N), % 0.21 to 0.32
0
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.020
0 to 0.015