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R30556 Alloy vs. ASTM Grade HT Steel

Both R30556 alloy and ASTM grade HT steel are iron alloys. They have 69% 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 HT steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 45
4.6
Fatigue Strength, MPa 320
130
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 81
76
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
400
Maximum Temperature: Mechanical, °C 1100
1010
Melting Completion (Liquidus), °C 1420
1390
Melting Onset (Solidus), °C 1330
1340
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 11
12
Thermal Expansion, µm/m-K 15
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.8
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 1.9
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 70
31
Density, g/cm3 8.4
8.0
Embodied Carbon, kg CO2/kg material 8.7
5.4
Embodied Energy, MJ/kg 130
76
Embodied Water, L/kg 300
190

Common Calculations

PREN (Pitting Resistance) 40
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 290
19
Resilience: Unit (Modulus of Resilience), kJ/m3 290
180
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 26
18
Strength to Weight: Bending, points 22
18
Thermal Diffusivity, mm2/s 2.9
3.2
Thermal Shock Resistance, points 18
12

Alloy Composition

Aluminum (Al), % 0.1 to 0.5
0
Boron (B), % 0 to 0.020
0
Carbon (C), % 0.050 to 0.15
0.35 to 0.75
Chromium (Cr), % 21 to 23
15 to 19
Cobalt (Co), % 16 to 21
0
Iron (Fe), % 20.4 to 38.2
38.2 to 51.7
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
33 to 37
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 2.5
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