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ACI-ASTM CE30 Steel vs. S21800 Stainless Steel

Both ACI-ASTM CE30 steel and S21800 stainless steel are iron alloys. They have 88% 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 CE30 steel and the bottom bar is S21800 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
210
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 11
40
Fatigue Strength, MPa 170
330
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 79
75
Tensile Strength: Ultimate (UTS), MPa 630
740
Tensile Strength: Yield (Proof), MPa 310
390

Thermal Properties

Latent Heat of Fusion, J/g 310
340
Maximum Temperature: Corrosion, °C 460
410
Maximum Temperature: Mechanical, °C 1100
900
Melting Completion (Liquidus), °C 1410
1360
Melting Onset (Solidus), °C 1360
1310
Specific Heat Capacity, J/kg-K 490
500
Thermal Expansion, µm/m-K 17
16

Otherwise Unclassified Properties

Base Metal Price, % relative 19
15
Density, g/cm3 7.7
7.5
Embodied Carbon, kg CO2/kg material 3.4
3.1
Embodied Energy, MJ/kg 49
45
Embodied Water, L/kg 180
150

Common Calculations

PREN (Pitting Resistance) 28
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 59
250
Resilience: Unit (Modulus of Resilience), kJ/m3 240
390
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 25
26
Strength to Weight: Axial, points 23
27
Strength to Weight: Bending, points 21
24
Thermal Shock Resistance, points 13
17

Alloy Composition

Carbon (C), % 0 to 0.3
0 to 0.1
Chromium (Cr), % 26 to 30
16 to 18
Iron (Fe), % 55.1 to 66
59.1 to 65.4
Manganese (Mn), % 0 to 1.5
7.0 to 9.0
Nickel (Ni), % 8.0 to 11
8.0 to 9.0
Nitrogen (N), % 0
0.080 to 0.18
Phosphorus (P), % 0 to 0.040
0 to 0.060
Silicon (Si), % 0 to 2.0
3.5 to 4.5
Sulfur (S), % 0 to 0.040
0 to 0.030