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EN 1.4318 Stainless Steel vs. ACI-ASTM CF8 Steel

Both EN 1.4318 stainless steel and ACI-ASTM CF8 steel are iron alloys. They have a moderately high 95% 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 CF8 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 230
140
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 44
55
Fatigue Strength, MPa 340
260
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Tensile Strength: Ultimate (UTS), MPa 740
540
Tensile Strength: Yield (Proof), MPa 380
260

Thermal Properties

Latent Heat of Fusion, J/g 290
300
Maximum Temperature: Corrosion, °C 410
420
Maximum Temperature: Mechanical, °C 910
980
Melting Completion (Liquidus), °C 1430
1420
Melting Onset (Solidus), °C 1380
1430
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
16
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
16
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.8
3.1
Embodied Energy, MJ/kg 39
44
Embodied Water, L/kg 130
150

Common Calculations

PREN (Pitting Resistance) 20
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 280
240
Resilience: Unit (Modulus of Resilience), kJ/m3 360
160
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 27
19
Strength to Weight: Bending, points 23
19
Thermal Diffusivity, mm2/s 4.0
4.3
Thermal Shock Resistance, points 17
13

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.080
Chromium (Cr), % 16.5 to 18.5
18 to 21
Iron (Fe), % 70.2 to 77.4
63.8 to 74
Manganese (Mn), % 0 to 2.0
0 to 1.5
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 6.0 to 8.0
8.0 to 11
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