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EN 1.7709 Steel vs. ASTM Grade HT Steel

Both EN 1.7709 steel and ASTM grade HT steel are iron alloys. They have 48% of their average alloy composition in common. There are 26 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is EN 1.7709 steel and the bottom bar is ASTM grade HT steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 230
150
Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
76
Tensile Strength: Ultimate (UTS), MPa 650 to 780
500

Thermal Properties

Latent Heat of Fusion, J/g 250
310
Maximum Temperature: Mechanical, °C 440
1010
Melting Completion (Liquidus), °C 1470
1390
Melting Onset (Solidus), °C 1420
1340
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 33
12
Thermal Expansion, µm/m-K 11
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.5
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 3.4
31
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 2.3
5.4
Embodied Energy, MJ/kg 32
76
Embodied Water, L/kg 56
190

Common Calculations

PREN (Pitting Resistance) 3.6
18
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 23 to 27
18
Strength to Weight: Bending, points 21 to 24
18
Thermal Diffusivity, mm2/s 8.9
3.2
Thermal Shock Resistance, points 22 to 26
12

Alloy Composition

Aluminum (Al), % 0 to 0.030
0
Carbon (C), % 0.17 to 0.25
0.35 to 0.75
Chromium (Cr), % 1.2 to 1.5
15 to 19
Iron (Fe), % 95.2 to 97.5
38.2 to 51.7
Manganese (Mn), % 0.4 to 0.8
0 to 2.0
Molybdenum (Mo), % 0.55 to 0.8
0 to 0.5
Nickel (Ni), % 0 to 0.6
33 to 37
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 0.4
0 to 2.5
Sulfur (S), % 0 to 0.030
0 to 0.040
Vanadium (V), % 0.2 to 0.35
0