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S31730 Stainless Steel vs. EN 1.4729 Stainless Steel

Both S31730 stainless steel and EN 1.4729 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 S31730 stainless steel and the bottom bar is EN 1.4729 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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

Alloy Composition

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