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ASTM Grade HH Steel vs. EN 1.7729 Steel

Both ASTM grade HH steel and EN 1.7729 steel are iron alloys. They have 61% of their average alloy composition in common. There are 31 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 ASTM grade HH steel and the bottom bar is EN 1.7729 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170
270
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 11
17
Fatigue Strength, MPa 150
500
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 79
73
Tensile Strength: Ultimate (UTS), MPa 580
910
Tensile Strength: Yield (Proof), MPa 270
750

Thermal Properties

Latent Heat of Fusion, J/g 310
250
Maximum Temperature: Mechanical, °C 1100
430
Melting Completion (Liquidus), °C 1400
1470
Melting Onset (Solidus), °C 1360
1430
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
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 20
3.8
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 3.7
3.3
Embodied Energy, MJ/kg 53
49
Embodied Water, L/kg 180
59

Common Calculations

PREN (Pitting Resistance) 27
4.4
Resilience: Ultimate (Unit Rupture Work), MJ/m3 53
150
Resilience: Unit (Modulus of Resilience), kJ/m3 190
1500
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 21
32
Strength to Weight: Bending, points 20
27
Thermal Diffusivity, mm2/s 3.8
11
Thermal Shock Resistance, points 12
27

Alloy Composition

Aluminum (Al), % 0
0.015 to 0.080
Arsenic (As), % 0
0 to 0.020
Boron (B), % 0
0.0010 to 0.010
Carbon (C), % 0.2 to 0.5
0.17 to 0.23
Chromium (Cr), % 24 to 28
0.9 to 1.2
Copper (Cu), % 0
0 to 0.2
Iron (Fe), % 52.9 to 64.8
94.8 to 97
Manganese (Mn), % 0 to 2.0
0.35 to 0.75
Molybdenum (Mo), % 0 to 0.5
0.9 to 1.1
Nickel (Ni), % 11 to 14
0 to 0.2
Phosphorus (P), % 0 to 0.040
0 to 0.020
Silicon (Si), % 0 to 2.0
0 to 0.4
Sulfur (S), % 0 to 0.040
0 to 0.015
Tin (Sn), % 0
0 to 0.020
Titanium (Ti), % 0
0.070 to 0.15
Vanadium (V), % 0
0.6 to 0.8