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EN 1.4634 Stainless Steel vs. EN 1.4029 Stainless Steel

Both EN 1.4634 stainless steel and EN 1.4029 stainless steel are iron alloys. They have a moderately high 92% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4634 stainless steel and the bottom bar is EN 1.4029 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 21
10 to 20
Fatigue Strength, MPa 180
270 to 400
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
76
Shear Strength, MPa 340
440 to 550
Tensile Strength: Ultimate (UTS), MPa 540
700 to 930
Tensile Strength: Yield (Proof), MPa 280
410 to 740

Thermal Properties

Latent Heat of Fusion, J/g 290
270
Maximum Temperature: Corrosion, °C 500
390
Maximum Temperature: Mechanical, °C 900
750
Melting Completion (Liquidus), °C 1430
1440
Melting Onset (Solidus), °C 1390
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 21
30
Thermal Expansion, µm/m-K 10
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
3.1
Electrical Conductivity: Equal Weight (Specific), % IACS 3.0
3.7

Otherwise Unclassified Properties

Base Metal Price, % relative 13
7.0
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 2.9
2.0
Embodied Energy, MJ/kg 42
28
Embodied Water, L/kg 140
100

Common Calculations

PREN (Pitting Resistance) 19
14
Resilience: Ultimate (Unit Rupture Work), MJ/m3 93
89 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 200
440 to 1410
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 20
25 to 33
Strength to Weight: Bending, points 19
23 to 27
Thermal Diffusivity, mm2/s 5.8
8.1
Thermal Shock Resistance, points 19
26 to 34

Alloy Composition

Aluminum (Al), % 0.2 to 1.5
0
Carbon (C), % 0 to 0.030
0.25 to 0.32
Chromium (Cr), % 17.5 to 18.5
12 to 13.5
Copper (Cu), % 0 to 0.5
0
Iron (Fe), % 74.9 to 81.8
82.8 to 87.6
Manganese (Mn), % 0 to 1.0
0 to 1.5
Molybdenum (Mo), % 0 to 0.5
0 to 0.6
Nickel (Ni), % 0 to 0.5
0
Niobium (Nb), % 0.3 to 1.0
0
Phosphorus (P), % 0 to 0.050
0 to 0.040
Silicon (Si), % 0.2 to 1.5
0 to 1.0
Sulfur (S), % 0 to 0.050
0.15 to 0.25