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ACI-ASTM CN7MS Steel vs. ASTM A387 Grade 5 Steel

Both ACI-ASTM CN7MS steel and ASTM A387 grade 5 steel are iron alloys. They have 56% of their average alloy composition in common. There are 29 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 CN7MS steel and the bottom bar is ASTM A387 grade 5 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
150 to 180
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 39
20 to 21
Fatigue Strength, MPa 200
160 to 240
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
74
Tensile Strength: Ultimate (UTS), MPa 540
500 to 600
Tensile Strength: Yield (Proof), MPa 230
230 to 350

Thermal Properties

Latent Heat of Fusion, J/g 340
260
Maximum Temperature: Mechanical, °C 1040
510
Melting Completion (Liquidus), °C 1400
1460
Melting Onset (Solidus), °C 1350
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 12
40
Thermal Expansion, µm/m-K 16
13

Otherwise Unclassified Properties

Base Metal Price, % relative 28
4.3
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 5.1
1.7
Embodied Energy, MJ/kg 71
23
Embodied Water, L/kg 180
69

Common Calculations

PREN (Pitting Resistance) 28
6.8
Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
83 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 140
140 to 320
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 19
18 to 21
Strength to Weight: Bending, points 19
18 to 20
Thermal Diffusivity, mm2/s 3.2
11
Thermal Shock Resistance, points 13
14 to 17

Alloy Composition

Carbon (C), % 0 to 0.070
0 to 0.15
Chromium (Cr), % 18 to 20
4.0 to 6.0
Copper (Cu), % 1.5 to 2.0
0
Iron (Fe), % 45.4 to 53.5
92.1 to 95.3
Manganese (Mn), % 0 to 1.0
0.3 to 0.6
Molybdenum (Mo), % 2.5 to 3.0
0.45 to 0.65
Nickel (Ni), % 22 to 25
0
Phosphorus (P), % 0 to 0.040
0 to 0.025
Silicon (Si), % 2.5 to 3.5
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.025