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S15700 Stainless Steel vs. ACI-ASTM CF8C Steel

Both S15700 stainless steel and ACI-ASTM CF8C steel are iron alloys. They have a moderately high 91% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is S15700 stainless steel and the bottom bar is ACI-ASTM CF8C steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 460
150
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 1.1 to 29
40
Fatigue Strength, MPa 370 to 770
220
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Tensile Strength: Ultimate (UTS), MPa 1180 to 1890
530
Tensile Strength: Yield (Proof), MPa 500 to 1770
260

Thermal Properties

Latent Heat of Fusion, J/g 290
300
Maximum Temperature: Corrosion, °C 400
490
Maximum Temperature: Mechanical, °C 870
980
Melting Completion (Liquidus), °C 1440
1420
Melting Onset (Solidus), °C 1400
1430
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 16
16
Thermal Expansion, µm/m-K 11
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 15
19
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.4
3.7
Embodied Energy, MJ/kg 47
53
Embodied Water, L/kg 140
150

Common Calculations

PREN (Pitting Resistance) 23
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 17 to 270
180
Resilience: Unit (Modulus of Resilience), kJ/m3 640 to 4660
170
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 42 to 67
19
Strength to Weight: Bending, points 32 to 43
19
Thermal Diffusivity, mm2/s 4.2
4.3
Thermal Shock Resistance, points 39 to 63
11

Alloy Composition

Aluminum (Al), % 0.75 to 1.5
0
Carbon (C), % 0 to 0.090
0 to 0.080
Chromium (Cr), % 14 to 16
18 to 21
Iron (Fe), % 69.6 to 76.8
61.8 to 73
Manganese (Mn), % 0 to 1.0
0 to 1.5
Molybdenum (Mo), % 2.0 to 3.0
0 to 0.5
Nickel (Ni), % 6.5 to 7.7
9.0 to 12
Niobium (Nb), % 0
0 to 1.0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 2.0
Sulfur (S), % 0 to 0.030
0 to 0.040