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EN 1.7729 Steel vs. N08031 Stainless Steel

Both EN 1.7729 steel and N08031 stainless steel are iron alloys. They have a modest 36% of their average alloy composition in common, which, by itself, doesn't mean much. There are 29 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is EN 1.7729 steel and the bottom bar is N08031 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 17
45
Fatigue Strength, MPa 500
290
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
81
Shear Strength, MPa 560
510
Tensile Strength: Ultimate (UTS), MPa 910
730
Tensile Strength: Yield (Proof), MPa 750
310

Thermal Properties

Latent Heat of Fusion, J/g 250
310
Maximum Temperature: Mechanical, °C 430
1100
Melting Completion (Liquidus), °C 1470
1440
Melting Onset (Solidus), °C 1430
1390
Specific Heat Capacity, J/kg-K 470
460
Thermal Conductivity, W/m-K 40
12
Thermal Expansion, µm/m-K 13
18

Otherwise Unclassified Properties

Base Metal Price, % relative 3.8
39
Density, g/cm3 7.8
8.1
Embodied Carbon, kg CO2/kg material 3.3
7.1
Embodied Energy, MJ/kg 49
96
Embodied Water, L/kg 59
240

Common Calculations

PREN (Pitting Resistance) 4.4
52
Resilience: Ultimate (Unit Rupture Work), MJ/m3 150
270
Resilience: Unit (Modulus of Resilience), kJ/m3 1500
230
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 32
25
Strength to Weight: Bending, points 27
22
Thermal Diffusivity, mm2/s 11
3.1
Thermal Shock Resistance, points 27
14

Alloy Composition

Aluminum (Al), % 0.015 to 0.080
0
Arsenic (As), % 0 to 0.020
0
Boron (B), % 0.0010 to 0.010
0
Carbon (C), % 0.17 to 0.23
0 to 0.015
Chromium (Cr), % 0.9 to 1.2
26 to 28
Copper (Cu), % 0 to 0.2
1.0 to 1.4
Iron (Fe), % 94.8 to 97
29 to 36.9
Manganese (Mn), % 0.35 to 0.75
0 to 2.0
Molybdenum (Mo), % 0.9 to 1.1
6.0 to 7.0
Nickel (Ni), % 0 to 0.2
30 to 32
Nitrogen (N), % 0
0.15 to 0.25
Phosphorus (P), % 0 to 0.020
0 to 0.020
Silicon (Si), % 0 to 0.4
0 to 0.3
Sulfur (S), % 0 to 0.015
0 to 0.010
Tin (Sn), % 0 to 0.020
0
Titanium (Ti), % 0.070 to 0.15
0
Vanadium (V), % 0.6 to 0.8
0