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EN 1.4807 Stainless Steel vs. ACI-ASTM CK20 Steel

Both EN 1.4807 stainless steel and ACI-ASTM CK20 steel are iron alloys. They have 83% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4807 stainless steel and the bottom bar is ACI-ASTM CK20 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
150
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 4.5
37
Fatigue Strength, MPa 120
220
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 75
78
Tensile Strength: Ultimate (UTS), MPa 480
530
Tensile Strength: Yield (Proof), MPa 250
260

Thermal Properties

Latent Heat of Fusion, J/g 320
310
Maximum Temperature: Corrosion, °C 600
440
Maximum Temperature: Mechanical, °C 1000
1100
Melting Completion (Liquidus), °C 1390
1400
Melting Onset (Solidus), °C 1350
1430
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 12
14
Thermal Expansion, µm/m-K 15
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.7
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 1.9
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 39
25
Density, g/cm3 8.0
7.8
Embodied Carbon, kg CO2/kg material 6.8
4.4
Embodied Energy, MJ/kg 97
62
Embodied Water, L/kg 190
190

Common Calculations

PREN (Pitting Resistance) 19
26
Resilience: Ultimate (Unit Rupture Work), MJ/m3 18
160
Resilience: Unit (Modulus of Resilience), kJ/m3 160
170
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 17
19
Strength to Weight: Bending, points 17
19
Thermal Diffusivity, mm2/s 3.2
3.7
Thermal Shock Resistance, points 12
13

Alloy Composition

Carbon (C), % 0.3 to 0.5
0 to 0.2
Chromium (Cr), % 17 to 20
23 to 27
Iron (Fe), % 36.6 to 46.7
46.7 to 58
Manganese (Mn), % 0 to 2.0
0 to 2.0
Molybdenum (Mo), % 0 to 0.5
0 to 0.5
Nickel (Ni), % 34 to 36
19 to 22
Niobium (Nb), % 1.0 to 1.8
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 1.0 to 2.5
0 to 2.0
Sulfur (S), % 0 to 0.030
0 to 0.040