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EN 1.4318 Stainless Steel vs. ACI-ASTM CH20 Steel

Both EN 1.4318 stainless steel and ACI-ASTM CH20 steel are iron alloys. They have 86% 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 1.4318 stainless steel and the bottom bar is ACI-ASTM CH20 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 230
190
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 44
38
Fatigue Strength, MPa 340
290
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 77
78
Tensile Strength: Ultimate (UTS), MPa 740
610
Tensile Strength: Yield (Proof), MPa 380
350

Thermal Properties

Latent Heat of Fusion, J/g 290
310
Maximum Temperature: Corrosion, °C 410
440
Maximum Temperature: Mechanical, °C 910
1100
Melting Completion (Liquidus), °C 1430
1410
Melting Onset (Solidus), °C 1380
1430
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
14
Thermal Expansion, µm/m-K 16
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 13
20
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.8
3.7
Embodied Energy, MJ/kg 39
53
Embodied Water, L/kg 130
180

Common Calculations

PREN (Pitting Resistance) 20
25
Resilience: Ultimate (Unit Rupture Work), MJ/m3 280
200
Resilience: Unit (Modulus of Resilience), kJ/m3 360
300
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 27
22
Strength to Weight: Bending, points 23
21
Thermal Diffusivity, mm2/s 4.0
3.7
Thermal Shock Resistance, points 17
15

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.2
Chromium (Cr), % 16.5 to 18.5
22 to 26
Iron (Fe), % 70.2 to 77.4
54.7 to 66
Manganese (Mn), % 0 to 2.0
0 to 1.5
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 6.0 to 8.0
12 to 15
Nitrogen (N), % 0.1 to 0.2
0
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 2.0
Sulfur (S), % 0 to 0.015
0 to 0.040