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ASTM Grade HH Steel vs. ACI-ASTM CA6N Steel

Both ASTM grade HH steel and ACI-ASTM CA6N steel are iron alloys. They have 78% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

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

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 11
17
Fatigue Strength, MPa 150
640
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 79
75
Tensile Strength: Ultimate (UTS), MPa 580
1080
Tensile Strength: Yield (Proof), MPa 270
1060

Thermal Properties

Latent Heat of Fusion, J/g 310
280
Maximum Temperature: Corrosion, °C 440
390
Maximum Temperature: Mechanical, °C 1100
740
Melting Completion (Liquidus), °C 1400
1440
Melting Onset (Solidus), °C 1360
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 14
23
Thermal Expansion, µm/m-K 17
9.9

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
2.6
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
3.0

Otherwise Unclassified Properties

Base Metal Price, % relative 20
11
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 3.7
2.5
Embodied Energy, MJ/kg 53
35
Embodied Water, L/kg 180
110

Common Calculations

PREN (Pitting Resistance) 27
12
Resilience: Ultimate (Unit Rupture Work), MJ/m3 53
180
Resilience: Unit (Modulus of Resilience), kJ/m3 190
2900
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 21
38
Strength to Weight: Bending, points 20
30
Thermal Diffusivity, mm2/s 3.8
6.1
Thermal Shock Resistance, points 12
40

Alloy Composition

Carbon (C), % 0.2 to 0.5
0 to 0.060
Chromium (Cr), % 24 to 28
10.5 to 12.5
Iron (Fe), % 52.9 to 64.8
77.9 to 83.5
Manganese (Mn), % 0 to 2.0
0 to 0.5
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 11 to 14
6.0 to 8.0
Phosphorus (P), % 0 to 0.040
0 to 0.020
Silicon (Si), % 0 to 2.0
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.020