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EN 1.4749 Stainless Steel vs. S31655 Stainless Steel

Both EN 1.4749 stainless steel and S31655 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 89% of their average alloy composition in common. There are 33 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is EN 1.4749 stainless steel and the bottom bar is S31655 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
210
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 16
39
Fatigue Strength, MPa 190
300
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 80
78
Shear Strength, MPa 370
490
Tensile Strength: Ultimate (UTS), MPa 600
710
Tensile Strength: Yield (Proof), MPa 320
350

Thermal Properties

Latent Heat of Fusion, J/g 300
290
Maximum Temperature: Corrosion, °C 450
430
Maximum Temperature: Mechanical, °C 1100
1010
Melting Completion (Liquidus), °C 1420
1430
Melting Onset (Solidus), °C 1380
1380
Specific Heat Capacity, J/kg-K 490
480
Thermal Conductivity, W/m-K 17
15
Thermal Expansion, µm/m-K 9.6
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 13
17
Density, g/cm3 7.6
7.8
Embodied Carbon, kg CO2/kg material 2.5
3.3
Embodied Energy, MJ/kg 36
46
Embodied Water, L/kg 160
160

Common Calculations

PREN (Pitting Resistance) 31
27
Resilience: Ultimate (Unit Rupture Work), MJ/m3 80
230
Resilience: Unit (Modulus of Resilience), kJ/m3 250
310
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 26
25
Strength to Weight: Axial, points 22
25
Strength to Weight: Bending, points 21
23
Thermal Diffusivity, mm2/s 4.6
4.0
Thermal Shock Resistance, points 22
16

Alloy Composition

Carbon (C), % 0.15 to 0.2
0 to 0.030
Chromium (Cr), % 26 to 29
19.5 to 21.5
Copper (Cu), % 0
0 to 1.0
Iron (Fe), % 68.5 to 73.7
63.2 to 71.9
Manganese (Mn), % 0 to 1.0
0 to 2.0
Molybdenum (Mo), % 0
0.5 to 1.5
Nickel (Ni), % 0
8.0 to 9.5
Nitrogen (N), % 0.15 to 0.25
0.14 to 0.25
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.015