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ACI-ASTM CB7Cu-2 Steel vs. S17700 Stainless Steel

Both ACI-ASTM CB7Cu-2 steel and S17700 stainless steel are iron alloys. They have a moderately high 94% 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 CB7Cu-2 steel and the bottom bar is S17700 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 300 to 420
180 to 430
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 5.7 to 11
1.0 to 23
Fatigue Strength, MPa 420 to 590
290 to 560
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 75
76
Tensile Strength: Ultimate (UTS), MPa 960 to 1350
1180 to 1650
Tensile Strength: Yield (Proof), MPa 760 to 1180
430 to 1210

Thermal Properties

Latent Heat of Fusion, J/g 280
290
Melting Completion (Liquidus), °C 1430
1440
Melting Onset (Solidus), °C 1380
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 17
15
Thermal Expansion, µm/m-K 11
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 13
13
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 2.6
2.8
Embodied Energy, MJ/kg 38
40
Embodied Water, L/kg 130
150

Common Calculations

PREN (Pitting Resistance) 15
17
Resilience: Ultimate (Unit Rupture Work), MJ/m3 71 to 120
15 to 210
Resilience: Unit (Modulus of Resilience), kJ/m3 1510 to 3600
460 to 3750
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 34 to 48
42 to 59
Strength to Weight: Bending, points 28 to 35
32 to 40
Thermal Diffusivity, mm2/s 4.6
4.1
Thermal Shock Resistance, points 32 to 45
39 to 54

Alloy Composition

Aluminum (Al), % 0
0.75 to 1.5
Carbon (C), % 0 to 0.070
0 to 0.090
Chromium (Cr), % 14 to 15.5
16 to 18
Copper (Cu), % 2.5 to 3.2
0
Iron (Fe), % 73.6 to 79
70.5 to 76.8
Manganese (Mn), % 0 to 0.7
0 to 1.0
Nickel (Ni), % 4.5 to 5.5
6.5 to 7.8
Niobium (Nb), % 0 to 0.35
0
Nitrogen (N), % 0 to 0.050
0
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030