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S17400 Stainless Steel vs. ACI-ASTM CA6N Steel

Both S17400 stainless steel and ACI-ASTM CA6N 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 (4, in this case) are not shown.

For each property being compared, the top bar is S17400 stainless steel and the bottom bar is ACI-ASTM CA6N steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11 to 21
17
Fatigue Strength, MPa 380 to 670
640
Poisson's Ratio 0.28
0.28
Reduction in Area, % 40 to 62
57
Shear Modulus, GPa 75
75
Tensile Strength: Ultimate (UTS), MPa 910 to 1390
1080
Tensile Strength: Yield (Proof), MPa 580 to 1250
1060

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Maximum Temperature: Corrosion, °C 450
390
Maximum Temperature: Mechanical, °C 850
740
Melting Completion (Liquidus), °C 1440
1440
Melting Onset (Solidus), °C 1400
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 17
23
Thermal Expansion, µm/m-K 11
9.9

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
2.6
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
3.0

Otherwise Unclassified Properties

Base Metal Price, % relative 14
11
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.7
2.5
Embodied Energy, MJ/kg 39
35
Embodied Water, L/kg 130
110

Common Calculations

PREN (Pitting Resistance) 16
12
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 160
180
Resilience: Unit (Modulus of Resilience), kJ/m3 880 to 4060
2900
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 32 to 49
38
Strength to Weight: Bending, points 27 to 35
30
Thermal Diffusivity, mm2/s 4.5
6.1
Thermal Shock Resistance, points 30 to 46
40

Alloy Composition

Carbon (C), % 0 to 0.070
0 to 0.060
Chromium (Cr), % 15 to 17
10.5 to 12.5
Copper (Cu), % 3.0 to 5.0
0
Iron (Fe), % 70.4 to 78.9
77.9 to 83.5
Manganese (Mn), % 0 to 1.0
0 to 0.5
Nickel (Ni), % 3.0 to 5.0
6.0 to 8.0
Niobium (Nb), % 0.15 to 0.45
0
Phosphorus (P), % 0 to 0.040
0 to 0.020
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.020