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R30556 Alloy vs. EN 1.7703 Steel

Both R30556 alloy and EN 1.7703 steel are iron alloys. They have a modest 33% 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 (3, in this case) are not shown.

For each property being compared, the top bar is R30556 alloy and the bottom bar is EN 1.7703 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 45
20
Fatigue Strength, MPa 320
320 to 340
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 81
74
Shear Strength, MPa 550
420 to 430
Tensile Strength: Ultimate (UTS), MPa 780
670 to 690
Tensile Strength: Yield (Proof), MPa 350
460 to 500

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Maximum Temperature: Mechanical, °C 1100
460
Melting Completion (Liquidus), °C 1420
1470
Melting Onset (Solidus), °C 1330
1430
Specific Heat Capacity, J/kg-K 450
470
Thermal Conductivity, W/m-K 11
39
Thermal Expansion, µm/m-K 15
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.8
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 1.9
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 70
4.2
Density, g/cm3 8.4
7.9
Embodied Carbon, kg CO2/kg material 8.7
2.5
Embodied Energy, MJ/kg 130
35
Embodied Water, L/kg 300
61

Common Calculations

PREN (Pitting Resistance) 40
5.6
Resilience: Ultimate (Unit Rupture Work), MJ/m3 290
120 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 290
570 to 650
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 26
24
Strength to Weight: Bending, points 22
22
Thermal Diffusivity, mm2/s 2.9
11
Thermal Shock Resistance, points 18
19 to 20

Alloy Composition

Aluminum (Al), % 0.1 to 0.5
0
Boron (B), % 0 to 0.020
0
Carbon (C), % 0.050 to 0.15
0.11 to 0.15
Chromium (Cr), % 21 to 23
2.0 to 2.5
Cobalt (Co), % 16 to 21
0
Copper (Cu), % 0
0 to 0.2
Iron (Fe), % 20.4 to 38.2
94.6 to 96.4
Lanthanum (La), % 0.0050 to 0.1
0
Manganese (Mn), % 0.5 to 2.0
0.3 to 0.6
Molybdenum (Mo), % 2.5 to 4.0
0.9 to 1.1
Nickel (Ni), % 19 to 22.5
0 to 0.25
Niobium (Nb), % 0 to 0.3
0 to 0.070
Nitrogen (N), % 0.1 to 0.3
0 to 0.012
Phosphorus (P), % 0 to 0.040
0 to 0.015
Silicon (Si), % 0.2 to 0.8
0 to 0.1
Sulfur (S), % 0 to 0.015
0 to 0.0050
Tantalum (Ta), % 0.3 to 1.3
0
Titanium (Ti), % 0
0 to 0.030
Tungsten (W), % 2.0 to 3.5
0
Vanadium (V), % 0
0.25 to 0.35
Zinc (Zn), % 0.0010 to 0.1
0