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EN 1.3956 Stainless Steel vs. R30556 Alloy

Both EN 1.3956 stainless steel and R30556 alloy are iron alloys. They have 68% of their average alloy composition in common. There are 27 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is EN 1.3956 stainless steel and the bottom bar is R30556 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
210
Elongation at Break, % 27
45
Fatigue Strength, MPa 240
320
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 79
81
Tensile Strength: Ultimate (UTS), MPa 650
780
Tensile Strength: Yield (Proof), MPa 330
350

Thermal Properties

Latent Heat of Fusion, J/g 300
300
Maximum Temperature: Corrosion, °C 460
450
Maximum Temperature: Mechanical, °C 1080
1100
Melting Completion (Liquidus), °C 1420
1420
Melting Onset (Solidus), °C 1380
1330
Specific Heat Capacity, J/kg-K 480
450
Thermal Expansion, µm/m-K 13
15

Otherwise Unclassified Properties

Base Metal Price, % relative 22
70
Density, g/cm3 7.8
8.4
Embodied Carbon, kg CO2/kg material 4.8
8.7
Embodied Energy, MJ/kg 68
130
Embodied Water, L/kg 180
300

Common Calculations

PREN (Pitting Resistance) 34
40
Resilience: Ultimate (Unit Rupture Work), MJ/m3 150
290
Resilience: Unit (Modulus of Resilience), kJ/m3 270
290
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 23
26
Strength to Weight: Bending, points 21
22
Thermal Shock Resistance, points 18
18

Alloy Composition

Aluminum (Al), % 0
0.1 to 0.5
Boron (B), % 0
0 to 0.020
Carbon (C), % 0 to 0.060
0.050 to 0.15
Chromium (Cr), % 20.5 to 23.5
21 to 23
Cobalt (Co), % 0
16 to 21
Iron (Fe), % 51.9 to 62.1
20.4 to 38.2
Lanthanum (La), % 0
0.0050 to 0.1
Manganese (Mn), % 4.0 to 6.0
0.5 to 2.0
Molybdenum (Mo), % 1.5 to 3.0
2.5 to 4.0
Nickel (Ni), % 11.5 to 13.5
19 to 22.5
Niobium (Nb), % 0.1 to 0.3
0 to 0.3
Nitrogen (N), % 0.2 to 0.4
0.1 to 0.3
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0.2 to 0.8
Sulfur (S), % 0 to 0.030
0 to 0.015
Tantalum (Ta), % 0
0.3 to 1.3
Tungsten (W), % 0
2.0 to 3.5
Vanadium (V), % 0.1 to 0.3
0
Zinc (Zn), % 0
0.0010 to 0.1