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EN 1.4729 Stainless Steel vs. S31730 Stainless Steel

Both EN 1.4729 stainless steel and S31730 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 71% of their average alloy composition in common. There are 20 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.

For each property being compared, the top bar is EN 1.4729 stainless steel and the bottom bar is S31730 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260
180
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 15
40
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 75
77

Thermal Properties

Latent Heat of Fusion, J/g 300
290
Maximum Temperature: Corrosion, °C 390
420
Maximum Temperature: Mechanical, °C 850
990
Melting Completion (Liquidus), °C 1420
1430
Melting Onset (Solidus), °C 1380
1390
Specific Heat Capacity, J/kg-K 490
470
Thermal Expansion, µm/m-K 10
16

Otherwise Unclassified Properties

Base Metal Price, % relative 7.5
24
Density, g/cm3 7.6
8.0
Embodied Carbon, kg CO2/kg material 2.1
4.6
Embodied Energy, MJ/kg 29
63
Embodied Water, L/kg 100
180

Common Calculations

PREN (Pitting Resistance) 14
30
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24

Alloy Composition

Carbon (C), % 0.3 to 0.5
0 to 0.030
Chromium (Cr), % 12 to 14
17 to 19
Copper (Cu), % 0
4.0 to 5.0
Iron (Fe), % 80.4 to 86.7
52.4 to 61
Manganese (Mn), % 0 to 1.0
0 to 2.0
Molybdenum (Mo), % 0 to 0.5
3.0 to 4.0
Nickel (Ni), % 0 to 1.0
15 to 16.5
Nitrogen (N), % 0
0 to 0.045
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 1.0 to 2.5
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.010