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EN 1.7779 Steel vs. ASTM Grade HP Steel

Both EN 1.7779 steel and ASTM grade HP steel are iron alloys. They have 40% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is EN 1.7779 steel and the bottom bar is ASTM grade HP steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 240
140
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 16
5.1
Fatigue Strength, MPa 430
130
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
78
Tensile Strength: Ultimate (UTS), MPa 810
490
Tensile Strength: Yield (Proof), MPa 660
260

Thermal Properties

Latent Heat of Fusion, J/g 260
320
Maximum Temperature: Mechanical, °C 470
1100
Melting Completion (Liquidus), °C 1460
1370
Melting Onset (Solidus), °C 1420
1330
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 39
12
Thermal Expansion, µm/m-K 13
16

Otherwise Unclassified Properties

Base Metal Price, % relative 4.0
34
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 2.8
5.8
Embodied Energy, MJ/kg 41
82
Embodied Water, L/kg 64
220

Common Calculations

PREN (Pitting Resistance) 5.0
27
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
21
Resilience: Unit (Modulus of Resilience), kJ/m3 1150
170
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 29
17
Strength to Weight: Bending, points 25
17
Thermal Diffusivity, mm2/s 11
3.2
Thermal Shock Resistance, points 23
11

Alloy Composition

Aluminum (Al), % 0 to 0.040
0
Carbon (C), % 0.17 to 0.23
0.35 to 0.75
Chromium (Cr), % 3.0 to 3.3
24 to 28
Copper (Cu), % 0 to 0.3
0
Iron (Fe), % 93.8 to 95.4
29.2 to 42.7
Manganese (Mn), % 0.3 to 0.5
0 to 2.0
Molybdenum (Mo), % 0.5 to 0.6
0 to 0.5
Nickel (Ni), % 0 to 0.3
33 to 37
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0.15 to 0.35
0 to 2.5
Sulfur (S), % 0 to 0.010
0 to 0.040
Vanadium (V), % 0.45 to 0.55
0