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EN 1.7729 Steel vs. EN 1.4029 Stainless Steel

Both EN 1.7729 steel and EN 1.4029 stainless steel are iron alloys. They have 88% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is EN 1.7729 steel and the bottom bar is EN 1.4029 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 17
10 to 20
Fatigue Strength, MPa 500
270 to 400
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
76
Shear Strength, MPa 560
440 to 550
Tensile Strength: Ultimate (UTS), MPa 910
700 to 930
Tensile Strength: Yield (Proof), MPa 750
410 to 740

Thermal Properties

Latent Heat of Fusion, J/g 250
270
Maximum Temperature: Mechanical, °C 430
750
Melting Completion (Liquidus), °C 1470
1440
Melting Onset (Solidus), °C 1430
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 40
30
Thermal Expansion, µm/m-K 13
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
3.1
Electrical Conductivity: Equal Weight (Specific), % IACS 8.7
3.7

Otherwise Unclassified Properties

Base Metal Price, % relative 3.8
7.0
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 3.3
2.0
Embodied Energy, MJ/kg 49
28
Embodied Water, L/kg 59
100

Common Calculations

PREN (Pitting Resistance) 4.4
14
Resilience: Ultimate (Unit Rupture Work), MJ/m3 150
89 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 1500
440 to 1410
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 32
25 to 33
Strength to Weight: Bending, points 27
23 to 27
Thermal Diffusivity, mm2/s 11
8.1
Thermal Shock Resistance, points 27
26 to 34

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
0.25 to 0.32
Chromium (Cr), % 0.9 to 1.2
12 to 13.5
Copper (Cu), % 0 to 0.2
0
Iron (Fe), % 94.8 to 97
82.8 to 87.6
Manganese (Mn), % 0.35 to 0.75
0 to 1.5
Molybdenum (Mo), % 0.9 to 1.1
0 to 0.6
Nickel (Ni), % 0 to 0.2
0
Phosphorus (P), % 0 to 0.020
0 to 0.040
Silicon (Si), % 0 to 0.4
0 to 1.0
Sulfur (S), % 0 to 0.015
0.15 to 0.25
Tin (Sn), % 0 to 0.020
0
Titanium (Ti), % 0.070 to 0.15
0
Vanadium (V), % 0.6 to 0.8
0