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EN 1.8550 Steel vs. ASTM Grade HK Steel

Both EN 1.8550 steel and ASTM grade HK steel are iron alloys. They have 55% 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 EN 1.8550 steel and the bottom bar is ASTM grade HK steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 300
150
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 11
11
Fatigue Strength, MPa 470
150
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 73
79
Tensile Strength: Ultimate (UTS), MPa 1000
500
Tensile Strength: Yield (Proof), MPa 760
270

Thermal Properties

Latent Heat of Fusion, J/g 250
310
Maximum Temperature: Mechanical, °C 440
1100
Melting Completion (Liquidus), °C 1450
1400
Melting Onset (Solidus), °C 1410
1350
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 40
15
Thermal Expansion, µm/m-K 13
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 3.4
25
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.7
4.4
Embodied Energy, MJ/kg 23
63
Embodied Water, L/kg 67
200

Common Calculations

PREN (Pitting Resistance) 2.3
27
Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
48
Resilience: Unit (Modulus of Resilience), kJ/m3 1550
190
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 36
18
Strength to Weight: Bending, points 29
18
Thermal Diffusivity, mm2/s 11
3.9
Thermal Shock Resistance, points 29
11

Alloy Composition

Aluminum (Al), % 0.8 to 1.2
0
Carbon (C), % 0.3 to 0.37
0.2 to 0.6
Chromium (Cr), % 1.5 to 1.8
24 to 28
Iron (Fe), % 94.4 to 96.3
44.8 to 57.8
Manganese (Mn), % 0.4 to 0.7
0 to 2.0
Molybdenum (Mo), % 0.15 to 0.25
0 to 0.5
Nickel (Ni), % 0.85 to 1.2
18 to 22
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 0.4
0 to 2.0
Sulfur (S), % 0 to 0.035
0 to 0.040