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EN 1.4029 Stainless Steel vs. EN 1.4521 Stainless Steel

Both EN 1.4029 stainless steel and EN 1.4521 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 1.4029 stainless steel and the bottom bar is EN 1.4521 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 10 to 20
23
Fatigue Strength, MPa 270 to 400
230
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
78
Shear Strength, MPa 440 to 550
330
Tensile Strength: Ultimate (UTS), MPa 700 to 930
520
Tensile Strength: Yield (Proof), MPa 410 to 740
340

Thermal Properties

Latent Heat of Fusion, J/g 270
290
Maximum Temperature: Corrosion, °C 390
500
Maximum Temperature: Mechanical, °C 750
930
Melting Completion (Liquidus), °C 1440
1460
Melting Onset (Solidus), °C 1400
1410
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 30
23
Thermal Expansion, µm/m-K 10
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.1
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 3.7
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
12
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 2.0
2.8
Embodied Energy, MJ/kg 28
39
Embodied Water, L/kg 100
130

Common Calculations

PREN (Pitting Resistance) 14
26
Resilience: Ultimate (Unit Rupture Work), MJ/m3 89 to 120
100
Resilience: Unit (Modulus of Resilience), kJ/m3 440 to 1410
280
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 25 to 33
19
Strength to Weight: Bending, points 23 to 27
19
Thermal Diffusivity, mm2/s 8.1
6.2
Thermal Shock Resistance, points 26 to 34
18

Alloy Composition

Carbon (C), % 0.25 to 0.32
0 to 0.025
Chromium (Cr), % 12 to 13.5
17 to 20
Iron (Fe), % 82.8 to 87.6
74.6 to 81.1
Manganese (Mn), % 0 to 1.5
0 to 1.0
Molybdenum (Mo), % 0 to 0.6
1.8 to 2.5
Nitrogen (N), % 0
0 to 0.030
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0.15 to 0.25
0 to 0.015
Titanium (Ti), % 0
0.15 to 0.8