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ACI-ASTM CF20 Steel vs. EN 1.4057 Stainless Steel

Both ACI-ASTM CF20 steel and EN 1.4057 stainless steel are iron alloys. They have 88% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CF20 steel and the bottom bar is EN 1.4057 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 50
11 to 17
Fatigue Strength, MPa 240
320 to 430
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Tensile Strength: Ultimate (UTS), MPa 530
840 to 980
Tensile Strength: Yield (Proof), MPa 250
530 to 790

Thermal Properties

Latent Heat of Fusion, J/g 300
280
Maximum Temperature: Corrosion, °C 420
400
Maximum Temperature: Mechanical, °C 970
850
Melting Completion (Liquidus), °C 1420
1440
Melting Onset (Solidus), °C 1410
1390
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 16
25
Thermal Expansion, µm/m-K 17
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 16
9.5
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 3.1
2.2
Embodied Energy, MJ/kg 44
32
Embodied Water, L/kg 150
120

Common Calculations

PREN (Pitting Resistance) 20
16
Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
96 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 160
700 to 1610
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 19
30 to 35
Strength to Weight: Bending, points 19
26 to 28
Thermal Diffusivity, mm2/s 4.3
6.7
Thermal Shock Resistance, points 11
30 to 35

Alloy Composition

Carbon (C), % 0 to 0.2
0.12 to 0.22
Chromium (Cr), % 18 to 21
15 to 17
Iron (Fe), % 64.2 to 74
77.7 to 83.4
Manganese (Mn), % 0 to 1.5
0 to 1.5
Nickel (Ni), % 8.0 to 11
1.5 to 2.5
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 2.0
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.015