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EN 1.4938 Stainless Steel vs. ACI-ASTM CB30 Steel

Both EN 1.4938 stainless steel and ACI-ASTM CB30 steel are iron alloys. They have a moderately high 91% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is EN 1.4938 stainless steel and the bottom bar is ACI-ASTM CB30 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
77
Tensile Strength: Ultimate (UTS), MPa 870 to 1030
500
Tensile Strength: Yield (Proof), MPa 640 to 870
230

Thermal Properties

Latent Heat of Fusion, J/g 270
290
Maximum Temperature: Corrosion, °C 390
420
Maximum Temperature: Mechanical, °C 750
940
Melting Completion (Liquidus), °C 1460
1430
Melting Onset (Solidus), °C 1420
1380
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 30
21
Thermal Expansion, µm/m-K 11
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
3.0

Otherwise Unclassified Properties

Base Metal Price, % relative 10
10
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 3.3
2.3
Embodied Energy, MJ/kg 47
33
Embodied Water, L/kg 110
130

Common Calculations

PREN (Pitting Resistance) 18
20
Resilience: Unit (Modulus of Resilience), kJ/m3 1050 to 1920
140
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 31 to 37
18
Strength to Weight: Bending, points 26 to 29
18
Thermal Diffusivity, mm2/s 8.1
5.6
Thermal Shock Resistance, points 30 to 35
17

Alloy Composition

Carbon (C), % 0.080 to 0.15
0 to 0.3
Chromium (Cr), % 11 to 12.5
18 to 21
Copper (Cu), % 0
0 to 1.2
Iron (Fe), % 80.5 to 84.8
72.9 to 82
Manganese (Mn), % 0.4 to 0.9
0 to 1.0
Molybdenum (Mo), % 1.5 to 2.0
0
Nickel (Ni), % 2.0 to 3.0
0 to 2.0
Nitrogen (N), % 0.020 to 0.040
0
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 0.5
0 to 1.5
Sulfur (S), % 0 to 0.015
0 to 0.040
Vanadium (V), % 0.25 to 0.4
0