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R30556 Alloy vs. ASTM Grade HK Steel

Both R30556 alloy and ASTM grade HK steel are iron alloys. They have 73% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is R30556 alloy and the bottom bar is ASTM grade HK steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 45
11
Fatigue Strength, MPa 320
150
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 81
79
Tensile Strength: Ultimate (UTS), MPa 780
500
Tensile Strength: Yield (Proof), MPa 350
270

Thermal Properties

Latent Heat of Fusion, J/g 300
310
Maximum Temperature: Corrosion, °C 450
440
Maximum Temperature: Mechanical, °C 1100
1100
Melting Completion (Liquidus), °C 1420
1400
Melting Onset (Solidus), °C 1330
1350
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 11
15
Thermal Expansion, µm/m-K 15
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.8
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 1.9
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 70
25
Density, g/cm3 8.4
7.8
Embodied Carbon, kg CO2/kg material 8.7
4.4
Embodied Energy, MJ/kg 130
63
Embodied Water, L/kg 300
200

Common Calculations

PREN (Pitting Resistance) 40
27
Resilience: Ultimate (Unit Rupture Work), MJ/m3 290
48
Resilience: Unit (Modulus of Resilience), kJ/m3 290
190
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 26
18
Strength to Weight: Bending, points 22
18
Thermal Diffusivity, mm2/s 2.9
3.9
Thermal Shock Resistance, points 18
11

Alloy Composition

Aluminum (Al), % 0.1 to 0.5
0
Boron (B), % 0 to 0.020
0
Carbon (C), % 0.050 to 0.15
0.2 to 0.6
Chromium (Cr), % 21 to 23
24 to 28
Cobalt (Co), % 16 to 21
0
Iron (Fe), % 20.4 to 38.2
44.8 to 57.8
Lanthanum (La), % 0.0050 to 0.1
0
Manganese (Mn), % 0.5 to 2.0
0 to 2.0
Molybdenum (Mo), % 2.5 to 4.0
0 to 0.5
Nickel (Ni), % 19 to 22.5
18 to 22
Niobium (Nb), % 0 to 0.3
0
Nitrogen (N), % 0.1 to 0.3
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0.2 to 0.8
0 to 2.0
Sulfur (S), % 0 to 0.015
0 to 0.040
Tantalum (Ta), % 0.3 to 1.3
0
Tungsten (W), % 2.0 to 3.5
0
Zinc (Zn), % 0.0010 to 0.1
0