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R30556 Alloy vs. EN 1.6957 Steel

Both R30556 alloy and EN 1.6957 steel are iron alloys. They have a modest 35% of their average alloy composition in common, which, by itself, doesn't mean much. There are 31 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is R30556 alloy and the bottom bar is EN 1.6957 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 45
18
Fatigue Strength, MPa 320
530
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 81
73
Shear Strength, MPa 550
570
Tensile Strength: Ultimate (UTS), MPa 780
930
Tensile Strength: Yield (Proof), MPa 350
780

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Maximum Temperature: Mechanical, °C 1100
450
Melting Completion (Liquidus), °C 1420
1460
Melting Onset (Solidus), °C 1330
1420
Specific Heat Capacity, J/kg-K 450
470
Thermal Conductivity, W/m-K 11
47
Thermal Expansion, µm/m-K 15
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.8
7.9
Electrical Conductivity: Equal Weight (Specific), % IACS 1.9
9.1

Otherwise Unclassified Properties

Base Metal Price, % relative 70
5.0
Density, g/cm3 8.4
7.9
Embodied Carbon, kg CO2/kg material 8.7
2.1
Embodied Energy, MJ/kg 130
29
Embodied Water, L/kg 300
60

Common Calculations

PREN (Pitting Resistance) 40
2.7
Resilience: Ultimate (Unit Rupture Work), MJ/m3 290
160
Resilience: Unit (Modulus of Resilience), kJ/m3 290
1630
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 26
33
Strength to Weight: Bending, points 22
27
Thermal Diffusivity, mm2/s 2.9
13
Thermal Shock Resistance, points 18
27

Alloy Composition

Aluminum (Al), % 0.1 to 0.5
0
Boron (B), % 0 to 0.020
0
Carbon (C), % 0.050 to 0.15
0.22 to 0.32
Chromium (Cr), % 21 to 23
1.2 to 1.8
Cobalt (Co), % 16 to 21
0
Iron (Fe), % 20.4 to 38.2
92.7 to 94.7
Lanthanum (La), % 0.0050 to 0.1
0
Manganese (Mn), % 0.5 to 2.0
0.15 to 0.4
Molybdenum (Mo), % 2.5 to 4.0
0.25 to 0.45
Nickel (Ni), % 19 to 22.5
3.4 to 4.0
Niobium (Nb), % 0 to 0.3
0
Nitrogen (N), % 0.1 to 0.3
0
Phosphorus (P), % 0 to 0.040
0 to 0.010
Silicon (Si), % 0.2 to 0.8
0 to 0.15
Sulfur (S), % 0 to 0.015
0 to 0.0070
Tantalum (Ta), % 0.3 to 1.3
0
Tungsten (W), % 2.0 to 3.5
0
Vanadium (V), % 0
0.050 to 0.15
Zinc (Zn), % 0.0010 to 0.1
0