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ACI-ASTM CK35MN Steel vs. ASTM Grade HH Steel

Both ACI-ASTM CK35MN steel and ASTM grade HH steel are iron alloys. They have 85% of their average alloy composition in common.

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

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
170
Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 40
11
Fatigue Strength, MPa 270
150
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 81
79
Tensile Strength: Ultimate (UTS), MPa 650
580
Tensile Strength: Yield (Proof), MPa 310
270

Thermal Properties

Latent Heat of Fusion, J/g 310
310
Maximum Temperature: Corrosion, °C 440
440
Maximum Temperature: Mechanical, °C 1100
1100
Melting Completion (Liquidus), °C 1460
1400
Melting Onset (Solidus), °C 1410
1360
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 12
14
Thermal Expansion, µm/m-K 16
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.9
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 31
20
Density, g/cm3 8.0
7.7
Embodied Carbon, kg CO2/kg material 5.9
3.7
Embodied Energy, MJ/kg 81
53
Embodied Water, L/kg 210
180

Common Calculations

PREN (Pitting Resistance) 48
27
Resilience: Ultimate (Unit Rupture Work), MJ/m3 210
53
Resilience: Unit (Modulus of Resilience), kJ/m3 240
190
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 22
21
Strength to Weight: Bending, points 21
20
Thermal Diffusivity, mm2/s 3.3
3.8
Thermal Shock Resistance, points 14
12

Alloy Composition

Carbon (C), % 0 to 0.035
0.2 to 0.5
Chromium (Cr), % 22 to 24
24 to 28
Copper (Cu), % 0 to 0.4
0
Iron (Fe), % 43.4 to 51.8
52.9 to 64.8
Manganese (Mn), % 0 to 2.0
0 to 2.0
Molybdenum (Mo), % 6.0 to 6.8
0 to 0.5
Nickel (Ni), % 20 to 22
11 to 14
Nitrogen (N), % 0.21 to 0.32
0
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 2.0
Sulfur (S), % 0 to 0.020
0 to 0.040