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ACI-ASTM CH20 Steel vs. AISI 440C Stainless Steel

Both ACI-ASTM CH20 steel and AISI 440C stainless steel are iron alloys. They have 79% 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 CH20 steel and the bottom bar is AISI 440C stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 38
2.0 to 14
Fatigue Strength, MPa 290
260 to 840
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 78
76
Tensile Strength: Ultimate (UTS), MPa 610
710 to 1970
Tensile Strength: Yield (Proof), MPa 350
450 to 1900

Thermal Properties

Latent Heat of Fusion, J/g 310
280
Maximum Temperature: Corrosion, °C 440
390
Maximum Temperature: Mechanical, °C 1100
870
Melting Completion (Liquidus), °C 1410
1480
Melting Onset (Solidus), °C 1430
1370
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 14
22
Thermal Expansion, µm/m-K 15
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
2.8

Otherwise Unclassified Properties

Base Metal Price, % relative 20
9.0
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 3.7
2.2
Embodied Energy, MJ/kg 53
31
Embodied Water, L/kg 180
120

Common Calculations

PREN (Pitting Resistance) 25
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 200
39 to 88
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 22
26 to 71
Strength to Weight: Bending, points 21
23 to 46
Thermal Diffusivity, mm2/s 3.7
6.0
Thermal Shock Resistance, points 15
26 to 71

Alloy Composition

Carbon (C), % 0 to 0.2
1.0 to 1.2
Chromium (Cr), % 22 to 26
16 to 18
Iron (Fe), % 54.7 to 66
78 to 83.1
Manganese (Mn), % 0 to 1.5
0 to 1.0
Molybdenum (Mo), % 0 to 0.5
0 to 0.75
Nickel (Ni), % 12 to 15
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 2.0
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.015