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ACI-ASTM CH20 Steel vs. S44700 Stainless Steel

Both ACI-ASTM CH20 steel and S44700 stainless steel are iron alloys. They have 85% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CH20 steel and the bottom bar is S44700 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
200
Elastic (Young's, Tensile) Modulus, GPa 200
210
Elongation at Break, % 38
23
Fatigue Strength, MPa 290
300
Poisson's Ratio 0.27
0.27
Shear Modulus, GPa 78
82
Tensile Strength: Ultimate (UTS), MPa 610
600
Tensile Strength: Yield (Proof), MPa 350
450

Thermal Properties

Latent Heat of Fusion, J/g 310
300
Maximum Temperature: Corrosion, °C 440
460
Maximum Temperature: Mechanical, °C 1100
1100
Melting Completion (Liquidus), °C 1410
1460
Melting Onset (Solidus), °C 1430
1410
Specific Heat Capacity, J/kg-K 480
480
Thermal Expansion, µm/m-K 15
11

Otherwise Unclassified Properties

Base Metal Price, % relative 20
18
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.7
3.6
Embodied Energy, MJ/kg 53
49
Embodied Water, L/kg 180
180

Common Calculations

PREN (Pitting Resistance) 25
42
Resilience: Ultimate (Unit Rupture Work), MJ/m3 200
120
Resilience: Unit (Modulus of Resilience), kJ/m3 300
480
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 22
21
Strength to Weight: Bending, points 21
20
Thermal Shock Resistance, points 15
19

Alloy Composition

Carbon (C), % 0 to 0.2
0 to 0.010
Chromium (Cr), % 22 to 26
28 to 30
Copper (Cu), % 0
0 to 0.15
Iron (Fe), % 54.7 to 66
64.9 to 68.5
Manganese (Mn), % 0 to 1.5
0 to 0.3
Molybdenum (Mo), % 0 to 0.5
3.5 to 4.2
Nickel (Ni), % 12 to 15
0 to 0.15
Nitrogen (N), % 0
0 to 0.020
Phosphorus (P), % 0 to 0.040
0 to 0.025
Silicon (Si), % 0 to 2.0
0 to 0.2
Sulfur (S), % 0 to 0.040
0 to 0.020