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AISI 439 Stainless Steel vs. EN 1.7729 Steel

Both AISI 439 stainless steel and EN 1.7729 steel are iron alloys. They have 82% of their average alloy composition in common. There are 33 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 AISI 439 stainless steel and the bottom bar is EN 1.7729 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
270
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 23
17
Fatigue Strength, MPa 170
500
Poisson's Ratio 0.28
0.29
Reduction in Area, % 51
56
Shear Modulus, GPa 77
73
Shear Strength, MPa 310
560
Tensile Strength: Ultimate (UTS), MPa 490
910
Tensile Strength: Yield (Proof), MPa 250
750

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Maximum Temperature: Mechanical, °C 890
430
Melting Completion (Liquidus), °C 1510
1470
Melting Onset (Solidus), °C 1430
1430
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 25
40
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 3.4
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
3.8
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.3
3.3
Embodied Energy, MJ/kg 34
49
Embodied Water, L/kg 120
59

Common Calculations

PREN (Pitting Resistance) 18
4.4
Resilience: Ultimate (Unit Rupture Work), MJ/m3 95
150
Resilience: Unit (Modulus of Resilience), kJ/m3 160
1500
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 18
32
Strength to Weight: Bending, points 18
27
Thermal Diffusivity, mm2/s 6.7
11
Thermal Shock Resistance, points 16
27

Alloy Composition

Aluminum (Al), % 0 to 0.15
0.015 to 0.080
Arsenic (As), % 0
0 to 0.020
Boron (B), % 0
0.0010 to 0.010
Carbon (C), % 0 to 0.030
0.17 to 0.23
Chromium (Cr), % 17 to 19
0.9 to 1.2
Copper (Cu), % 0
0 to 0.2
Iron (Fe), % 77.1 to 82.8
94.8 to 97
Manganese (Mn), % 0 to 1.0
0.35 to 0.75
Molybdenum (Mo), % 0
0.9 to 1.1
Nickel (Ni), % 0 to 0.5
0 to 0.2
Nitrogen (N), % 0 to 0.030
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), % 0.2 to 1.1
0.070 to 0.15
Vanadium (V), % 0
0.6 to 0.8