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EN 1.3956 Stainless Steel vs. EN 1.4959 Stainless Steel

Both EN 1.3956 stainless steel and EN 1.4959 stainless steel are iron alloys. Both are furnished in the solution annealed (AT) condition. They have 79% 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 EN 1.4959 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 27
40
Fatigue Strength, MPa 240
170
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 79
77
Tensile Strength: Ultimate (UTS), MPa 650
630
Tensile Strength: Yield (Proof), MPa 330
190

Thermal Properties

Latent Heat of Fusion, J/g 300
300
Maximum Temperature: Corrosion, °C 460
510
Maximum Temperature: Mechanical, °C 1080
1090
Melting Completion (Liquidus), °C 1420
1400
Melting Onset (Solidus), °C 1380
1350
Specific Heat Capacity, J/kg-K 480
480
Thermal Expansion, µm/m-K 13
15

Otherwise Unclassified Properties

Base Metal Price, % relative 22
31
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 4.8
5.4
Embodied Energy, MJ/kg 68
76
Embodied Water, L/kg 180
200

Common Calculations

PREN (Pitting Resistance) 34
21
Resilience: Ultimate (Unit Rupture Work), MJ/m3 150
190
Resilience: Unit (Modulus of Resilience), kJ/m3 270
96
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 23
22
Strength to Weight: Bending, points 21
20
Thermal Shock Resistance, points 18
15

Alloy Composition

Aluminum (Al), % 0
0.25 to 0.65
Carbon (C), % 0 to 0.060
0.050 to 0.1
Chromium (Cr), % 20.5 to 23.5
19 to 22
Cobalt (Co), % 0
0 to 0.5
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 51.9 to 62.1
39.4 to 50.5
Manganese (Mn), % 4.0 to 6.0
0 to 1.5
Molybdenum (Mo), % 1.5 to 3.0
0
Nickel (Ni), % 11.5 to 13.5
30 to 34
Niobium (Nb), % 0.1 to 0.3
0
Nitrogen (N), % 0.2 to 0.4
0 to 0.030
Phosphorus (P), % 0 to 0.040
0 to 0.015
Silicon (Si), % 0 to 1.0
0 to 0.7
Sulfur (S), % 0 to 0.030
0 to 0.010
Titanium (Ti), % 0
0.25 to 0.65
Vanadium (V), % 0.1 to 0.3
0