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EN 1.4818 Stainless Steel vs. EN 1.4303 Stainless Steel

Both EN 1.4818 stainless steel and EN 1.4303 stainless steel are iron alloys. They have a very high 98% of their average alloy composition in common. There are 33 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is EN 1.4818 stainless steel and the bottom bar is EN 1.4303 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
190 to 270
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 40
13 to 49
Fatigue Strength, MPa 280
220 to 320
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 480
420 to 540
Tensile Strength: Ultimate (UTS), MPa 700
590 to 900
Tensile Strength: Yield (Proof), MPa 330
230 to 560

Thermal Properties

Latent Heat of Fusion, J/g 300
290
Maximum Temperature: Corrosion, °C 420
410
Maximum Temperature: Mechanical, °C 1050
940
Melting Completion (Liquidus), °C 1410
1420
Melting Onset (Solidus), °C 1370
1380
Specific Heat Capacity, J/kg-K 490
480
Thermal Conductivity, W/m-K 17
15
Thermal Expansion, µm/m-K 17
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 16
17
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 3.1
3.2
Embodied Energy, MJ/kg 44
46
Embodied Water, L/kg 150
150

Common Calculations

PREN (Pitting Resistance) 22
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
110 to 230
Resilience: Unit (Modulus of Resilience), kJ/m3 270
140 to 800
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 25
21 to 32
Strength to Weight: Bending, points 23
20 to 26
Thermal Diffusivity, mm2/s 4.5
4.0
Thermal Shock Resistance, points 15
13 to 20

Alloy Composition

Carbon (C), % 0.040 to 0.080
0 to 0.060
Cerium (Ce), % 0.030 to 0.080
0
Chromium (Cr), % 18 to 20
17 to 19
Iron (Fe), % 65.6 to 71.8
64.8 to 72
Manganese (Mn), % 0 to 1.0
0 to 2.0
Nickel (Ni), % 9.0 to 11
11 to 13
Nitrogen (N), % 0.12 to 0.2
0 to 0.1
Phosphorus (P), % 0 to 0.045
0 to 0.045
Silicon (Si), % 1.0 to 2.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.015