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ASTM A372 Grade J Steel vs. ACI-ASTM CK35MN Steel

Both ASTM A372 grade J steel and ACI-ASTM CK35MN steel are iron alloys. They have 50% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is ASTM A372 grade J steel and the bottom bar is ACI-ASTM CK35MN steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 310
190
Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 17 to 22
40
Fatigue Strength, MPa 310 to 570
270
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
81
Tensile Strength: Ultimate (UTS), MPa 650 to 1020
650
Tensile Strength: Yield (Proof), MPa 430 to 850
310

Thermal Properties

Latent Heat of Fusion, J/g 250
310
Maximum Temperature: Mechanical, °C 420
1100
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1420
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 44
12
Thermal Expansion, µm/m-K 13
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
2.1

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4
31
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 1.5
5.9
Embodied Energy, MJ/kg 20
81
Embodied Water, L/kg 51
210

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 130 to 170
210
Resilience: Unit (Modulus of Resilience), kJ/m3 500 to 1930
240
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 23 to 36
22
Strength to Weight: Bending, points 21 to 29
21
Thermal Diffusivity, mm2/s 12
3.3
Thermal Shock Resistance, points 19 to 30
14

Alloy Composition

Carbon (C), % 0.35 to 0.5
0 to 0.035
Chromium (Cr), % 0.8 to 1.2
22 to 24
Copper (Cu), % 0
0 to 0.4
Iron (Fe), % 96.7 to 97.8
43.4 to 51.8
Manganese (Mn), % 0.75 to 1.1
0 to 2.0
Molybdenum (Mo), % 0.15 to 0.25
6.0 to 6.8
Nickel (Ni), % 0
20 to 22
Nitrogen (N), % 0
0.21 to 0.32
Phosphorus (P), % 0 to 0.015
0 to 0.035
Silicon (Si), % 0.15 to 0.35
0 to 1.0
Sulfur (S), % 0 to 0.010
0 to 0.020