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EN 1.4021 Stainless Steel vs. EN 1.4034 Stainless Steel

Both EN 1.4021 stainless steel and EN 1.4034 stainless steel are iron alloys. Their average alloy composition is basically identical.

For each property being compared, the top bar is EN 1.4021 stainless steel and the bottom bar is EN 1.4034 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11 to 17
11 to 14
Fatigue Strength, MPa 240 to 380
230 to 400
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
76
Shear Strength, MPa 390 to 530
420 to 540
Tensile Strength: Ultimate (UTS), MPa 630 to 880
690 to 900
Tensile Strength: Yield (Proof), MPa 390 to 670
390 to 730

Thermal Properties

Latent Heat of Fusion, J/g 270
270
Maximum Temperature: Corrosion, °C 390
390
Maximum Temperature: Mechanical, °C 760
770
Melting Completion (Liquidus), °C 1440
1440
Melting Onset (Solidus), °C 1400
1390
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 30
30
Thermal Expansion, µm/m-K 11
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
3.1
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
3.7

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
7.0
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 1.9
2.0
Embodied Energy, MJ/kg 27
27
Embodied Water, L/kg 100
100

Common Calculations

PREN (Pitting Resistance) 13
14
Resilience: Ultimate (Unit Rupture Work), MJ/m3 88 to 110
81 to 94
Resilience: Unit (Modulus of Resilience), kJ/m3 400 to 1160
400 to 1370
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 23 to 31
25 to 32
Strength to Weight: Bending, points 21 to 26
22 to 27
Thermal Diffusivity, mm2/s 8.1
8.1
Thermal Shock Resistance, points 22 to 31
24 to 32

Alloy Composition

Carbon (C), % 0.16 to 0.25
0.43 to 0.5
Chromium (Cr), % 12 to 14
12.5 to 14.5
Iron (Fe), % 83.2 to 87.8
83 to 87.1
Manganese (Mn), % 0 to 1.5
0 to 1.0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.015

Comparable Variants