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ACI-ASTM CF8 Steel vs. EN 1.4857 Stainless Steel

Both ACI-ASTM CF8 steel and EN 1.4857 stainless steel are iron alloys. They have 68% of their average alloy composition in common.

For each property being compared, the top bar is ACI-ASTM CF8 steel and the bottom bar is EN 1.4857 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
150
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 55
6.7
Fatigue Strength, MPa 260
120
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
78
Tensile Strength: Ultimate (UTS), MPa 540
500
Tensile Strength: Yield (Proof), MPa 260
250

Thermal Properties

Latent Heat of Fusion, J/g 300
330
Maximum Temperature: Corrosion, °C 420
440
Maximum Temperature: Mechanical, °C 980
1100
Melting Completion (Liquidus), °C 1420
1370
Melting Onset (Solidus), °C 1430
1320
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 16
13
Thermal Expansion, µm/m-K 15
16

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 16
34
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 3.1
5.7
Embodied Energy, MJ/kg 44
81
Embodied Water, L/kg 150
220

Common Calculations

PREN (Pitting Resistance) 20
26
Resilience: Ultimate (Unit Rupture Work), MJ/m3 240
28
Resilience: Unit (Modulus of Resilience), kJ/m3 160
150
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 19
18
Strength to Weight: Bending, points 19
18
Thermal Diffusivity, mm2/s 4.3
3.4
Thermal Shock Resistance, points 13
11

Alloy Composition

Carbon (C), % 0 to 0.080
0.3 to 0.5
Chromium (Cr), % 18 to 21
24 to 27
Iron (Fe), % 63.8 to 74
31.4 to 41.7
Manganese (Mn), % 0 to 1.5
0 to 2.0
Molybdenum (Mo), % 0 to 0.5
0 to 0.5
Nickel (Ni), % 8.0 to 11
33 to 36
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 2.0
1.0 to 2.5
Sulfur (S), % 0 to 0.040
0 to 0.030