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EN 1.4303 Stainless Steel vs. EN 1.4818 Stainless Steel

Both EN 1.4303 stainless steel and EN 1.4818 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 1.4303 stainless steel and the bottom bar is EN 1.4818 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Electrical Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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

Alloy Composition

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