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EN 1.4123 Stainless Steel vs. EN 1.7729 Steel

Both EN 1.4123 stainless steel and EN 1.7729 steel are iron alloys. They have 84% of their average alloy composition in common. There are 26 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is EN 1.4123 stainless steel and the bottom bar is EN 1.7729 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220 to 250
270
Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
73
Tensile Strength: Ultimate (UTS), MPa 720 to 810
910

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Maximum Temperature: Mechanical, °C 840
430
Melting Completion (Liquidus), °C 1450
1470
Melting Onset (Solidus), °C 1410
1430
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 23
40
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 2.8
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 10
3.8
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 4.2
3.3
Embodied Energy, MJ/kg 62
49
Embodied Water, L/kg 120
59

Common Calculations

PREN (Pitting Resistance) 24
4.4
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 26 to 29
32
Strength to Weight: Bending, points 23 to 25
27
Thermal Diffusivity, mm2/s 6.3
11
Thermal Shock Resistance, points 26 to 29
27

Alloy Composition

Aluminum (Al), % 0
0.015 to 0.080
Arsenic (As), % 0
0 to 0.020
Boron (B), % 0
0.0010 to 0.010
Carbon (C), % 0.35 to 0.5
0.17 to 0.23
Chromium (Cr), % 14 to 16.5
0.9 to 1.2
Copper (Cu), % 0
0 to 0.2
Iron (Fe), % 76.7 to 84.6
94.8 to 97
Manganese (Mn), % 0 to 1.0
0.35 to 0.75
Molybdenum (Mo), % 1.0 to 2.5
0.9 to 1.1
Nickel (Ni), % 0 to 0.5
0 to 0.2
Nitrogen (N), % 0.1 to 0.3
0
Phosphorus (P), % 0 to 0.040
0 to 0.020
Silicon (Si), % 0 to 1.0
0 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.015
Tin (Sn), % 0
0 to 0.020
Titanium (Ti), % 0
0.070 to 0.15
Vanadium (V), % 0 to 1.5
0.6 to 0.8