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EN 1.3956 Stainless Steel vs. EN 1.4008 Stainless Steel

Both EN 1.3956 stainless steel and EN 1.4008 stainless steel are iron alloys. They have 73% 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 1.4008 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 27
17
Fatigue Strength, MPa 240
300
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 79
76
Tensile Strength: Ultimate (UTS), MPa 650
670
Tensile Strength: Yield (Proof), MPa 330
500

Thermal Properties

Latent Heat of Fusion, J/g 300
280
Maximum Temperature: Corrosion, °C 460
390
Maximum Temperature: Mechanical, °C 1080
760
Melting Completion (Liquidus), °C 1420
1450
Melting Onset (Solidus), °C 1380
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Expansion, µm/m-K 13
11

Otherwise Unclassified Properties

Base Metal Price, % relative 22
8.0
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 4.8
2.1
Embodied Energy, MJ/kg 68
30
Embodied Water, L/kg 180
100

Common Calculations

PREN (Pitting Resistance) 34
14
Resilience: Ultimate (Unit Rupture Work), MJ/m3 150
100
Resilience: Unit (Modulus of Resilience), kJ/m3 270
630
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 23
24
Strength to Weight: Bending, points 21
22
Thermal Shock Resistance, points 18
23

Alloy Composition

Carbon (C), % 0 to 0.060
0 to 0.1
Chromium (Cr), % 20.5 to 23.5
12 to 13.5
Iron (Fe), % 51.9 to 62.1
81.8 to 86.8
Manganese (Mn), % 4.0 to 6.0
0 to 1.0
Molybdenum (Mo), % 1.5 to 3.0
0.2 to 0.5
Nickel (Ni), % 11.5 to 13.5
1.0 to 2.0
Niobium (Nb), % 0.1 to 0.3
0
Nitrogen (N), % 0.2 to 0.4
0
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.025
Vanadium (V), % 0.1 to 0.3
0