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EN 1.4901 Stainless Steel vs. ACI-ASTM CG8M Steel

Both EN 1.4901 stainless steel and ACI-ASTM CG8M steel are iron alloys. They have 75% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is EN 1.4901 stainless steel and the bottom bar is ACI-ASTM CG8M steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 19
45
Fatigue Strength, MPa 310
280
Impact Strength: V-Notched Charpy, J 38
110
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
79
Tensile Strength: Ultimate (UTS), MPa 740
550
Tensile Strength: Yield (Proof), MPa 490
300

Thermal Properties

Latent Heat of Fusion, J/g 260
300
Maximum Temperature: Corrosion, °C 380
420
Maximum Temperature: Mechanical, °C 650
1020
Melting Completion (Liquidus), °C 1490
1450
Melting Onset (Solidus), °C 1450
1400
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 26
16
Thermal Expansion, µm/m-K 12
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.2
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 9.3
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 11
20
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 2.8
4.1
Embodied Energy, MJ/kg 40
56
Embodied Water, L/kg 89
160

Common Calculations

PREN (Pitting Resistance) 14
31
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
210
Resilience: Unit (Modulus of Resilience), kJ/m3 620
220
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 26
19
Strength to Weight: Bending, points 23
19
Thermal Diffusivity, mm2/s 6.9
4.3
Thermal Shock Resistance, points 23
12

Alloy Composition

Aluminum (Al), % 0 to 0.020
0
Boron (B), % 0.0010 to 0.0060
0
Carbon (C), % 0.070 to 0.13
0 to 0.080
Chromium (Cr), % 8.5 to 9.5
18 to 21
Iron (Fe), % 85.8 to 89.1
58.8 to 70
Manganese (Mn), % 0.3 to 0.6
0 to 1.5
Molybdenum (Mo), % 0.3 to 0.6
3.0 to 4.0
Nickel (Ni), % 0 to 0.4
9.0 to 13
Niobium (Nb), % 0.040 to 0.090
0
Nitrogen (N), % 0.030 to 0.070
0
Phosphorus (P), % 0 to 0.020
0 to 0.040
Silicon (Si), % 0 to 0.5
0 to 1.5
Sulfur (S), % 0 to 0.010
0 to 0.040
Titanium (Ti), % 0 to 0.010
0
Tungsten (W), % 1.5 to 2.0
0
Vanadium (V), % 0.15 to 0.25
0
Zirconium (Zr), % 0 to 0.010
0