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ACI-ASTM CF8 Steel vs. EN 1.4658 Stainless Steel

Both ACI-ASTM CF8 steel and EN 1.4658 stainless steel are iron alloys. They have 86% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CF8 steel and the bottom bar is EN 1.4658 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
260
Elastic (Young's, Tensile) Modulus, GPa 200
210
Elongation at Break, % 55
28
Fatigue Strength, MPa 260
530
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 77
81
Tensile Strength: Ultimate (UTS), MPa 540
900
Tensile Strength: Yield (Proof), MPa 260
730

Thermal Properties

Latent Heat of Fusion, J/g 300
300
Maximum Temperature: Corrosion, °C 420
460
Maximum Temperature: Mechanical, °C 980
1100
Melting Completion (Liquidus), °C 1420
1450
Melting Onset (Solidus), °C 1430
1400
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 16
16
Thermal Expansion, µm/m-K 15
13

Otherwise Unclassified Properties

Base Metal Price, % relative 16
25
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.1
4.5
Embodied Energy, MJ/kg 44
61
Embodied Water, L/kg 150
200

Common Calculations

PREN (Pitting Resistance) 20
49
Resilience: Ultimate (Unit Rupture Work), MJ/m3 240
240
Resilience: Unit (Modulus of Resilience), kJ/m3 160
1280
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 19
32
Strength to Weight: Bending, points 19
26
Thermal Diffusivity, mm2/s 4.3
4.3
Thermal Shock Resistance, points 13
24

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.030
Chromium (Cr), % 18 to 21
26 to 29
Cobalt (Co), % 0
0.5 to 2.0
Copper (Cu), % 0
0 to 1.0
Iron (Fe), % 63.8 to 74
50.9 to 63.7
Manganese (Mn), % 0 to 1.5
0 to 1.5
Molybdenum (Mo), % 0 to 0.5
4.0 to 5.0
Nickel (Ni), % 8.0 to 11
5.5 to 9.5
Nitrogen (N), % 0
0.3 to 0.5
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 2.0
0 to 0.5
Sulfur (S), % 0 to 0.040
0 to 0.010