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S31655 Stainless Steel vs. EN 1.4729 Stainless Steel

Both S31655 stainless steel and EN 1.4729 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 82% of their average alloy composition in common. There are 24 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is S31655 stainless steel and the bottom bar is EN 1.4729 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210
260
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 39
15
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
75

Thermal Properties

Latent Heat of Fusion, J/g 290
300
Maximum Temperature: Corrosion, °C 430
390
Maximum Temperature: Mechanical, °C 1010
850
Melting Completion (Liquidus), °C 1430
1420
Melting Onset (Solidus), °C 1380
1380
Specific Heat Capacity, J/kg-K 480
490
Thermal Conductivity, W/m-K 15
24
Thermal Expansion, µm/m-K 16
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
2.8
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 17
7.5
Density, g/cm3 7.8
7.6
Embodied Carbon, kg CO2/kg material 3.3
2.1
Embodied Energy, MJ/kg 46
29
Embodied Water, L/kg 160
100

Common Calculations

PREN (Pitting Resistance) 27
14
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Thermal Diffusivity, mm2/s 4.0
6.5

Alloy Composition

Carbon (C), % 0 to 0.030
0.3 to 0.5
Chromium (Cr), % 19.5 to 21.5
12 to 14
Copper (Cu), % 0 to 1.0
0
Iron (Fe), % 63.2 to 71.9
80.4 to 86.7
Manganese (Mn), % 0 to 2.0
0 to 1.0
Molybdenum (Mo), % 0.5 to 1.5
0 to 0.5
Nickel (Ni), % 8.0 to 9.5
0 to 1.0
Nitrogen (N), % 0.14 to 0.25
0
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 1.0
1.0 to 2.5
Sulfur (S), % 0 to 0.015
0 to 0.030