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ASTM Grade HH Steel vs. ASTM A182 Grade F5a

Both ASTM grade HH steel and ASTM A182 grade F5a are iron alloys. They have 65% of their average alloy composition in common. There are 31 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 grade HH steel and the bottom bar is ASTM A182 grade F5a.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170
310
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 11
25
Fatigue Strength, MPa 150
380
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 79
74
Tensile Strength: Ultimate (UTS), MPa 580
710
Tensile Strength: Yield (Proof), MPa 270
520

Thermal Properties

Latent Heat of Fusion, J/g 310
260
Maximum Temperature: Mechanical, °C 1100
510
Melting Completion (Liquidus), °C 1400
1460
Melting Onset (Solidus), °C 1360
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 14
40
Thermal Expansion, µm/m-K 17
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
8.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
9.4

Otherwise Unclassified Properties

Base Metal Price, % relative 20
4.5
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 3.7
1.8
Embodied Energy, MJ/kg 53
24
Embodied Water, L/kg 180
69

Common Calculations

PREN (Pitting Resistance) 27
6.8
Resilience: Ultimate (Unit Rupture Work), MJ/m3 53
160
Resilience: Unit (Modulus of Resilience), kJ/m3 190
700
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 21
25
Strength to Weight: Bending, points 20
23
Thermal Diffusivity, mm2/s 3.8
11
Thermal Shock Resistance, points 12
20

Alloy Composition

Carbon (C), % 0.2 to 0.5
0 to 0.25
Chromium (Cr), % 24 to 28
4.0 to 6.0
Iron (Fe), % 52.9 to 64.8
91.4 to 95.6
Manganese (Mn), % 0 to 2.0
0 to 0.6
Molybdenum (Mo), % 0 to 0.5
0.44 to 0.65
Nickel (Ni), % 11 to 14
0 to 0.5
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 2.0
0 to 0.5
Sulfur (S), % 0 to 0.040
0 to 0.030