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EN 1.4301 Stainless Steel vs. AISI 303 Stainless Steel

Both EN 1.4301 stainless steel and AISI 303 stainless steel are iron alloys. Their average alloy composition is basically identical. There are 33 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is EN 1.4301 stainless steel and the bottom bar is AISI 303 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190 to 270
170 to 210
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 14 to 46
40 to 51
Fatigue Strength, MPa 200 to 330
230 to 360
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 430 to 550
430 to 470
Tensile Strength: Ultimate (UTS), MPa 610 to 900
600 to 690
Tensile Strength: Yield (Proof), MPa 220 to 570
230 to 420

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Corrosion, °C 420
410
Maximum Temperature: Mechanical, °C 940
930
Melting Completion (Liquidus), °C 1430
1450
Melting Onset (Solidus), °C 1380
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
16
Thermal Expansion, µm/m-K 16
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
2.8

Otherwise Unclassified Properties

Base Metal Price, % relative 15
15
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.0
3.0
Embodied Energy, MJ/kg 43
42
Embodied Water, L/kg 140
140

Common Calculations

PREN (Pitting Resistance) 19
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 220
240
Resilience: Unit (Modulus of Resilience), kJ/m3 120 to 820
140 to 440
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 22 to 32
21 to 25
Strength to Weight: Bending, points 20 to 27
20 to 22
Thermal Diffusivity, mm2/s 4.0
4.4
Thermal Shock Resistance, points 14 to 20
13 to 15

Alloy Composition

Carbon (C), % 0 to 0.070
0 to 0.15
Chromium (Cr), % 17.5 to 19.5
17 to 19
Iron (Fe), % 66.8 to 74.5
67.3 to 74.9
Manganese (Mn), % 0 to 2.0
0 to 2.0
Nickel (Ni), % 8.0 to 10.5
8.0 to 10
Nitrogen (N), % 0 to 0.1
0
Phosphorus (P), % 0 to 0.045
0 to 0.2
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0.15 to 0.35