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EN 1.4988 Stainless Steel vs. EN 1.4449 Stainless Steel

Both EN 1.4988 stainless steel and EN 1.4449 stainless steel are iron alloys. They have a very high 97% 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 1.4988 stainless steel and the bottom bar is EN 1.4449 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
190
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 34
48
Fatigue Strength, MPa 230
240
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
78
Shear Strength, MPa 430
440
Tensile Strength: Ultimate (UTS), MPa 640
620
Tensile Strength: Yield (Proof), MPa 290
250

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Corrosion, °C 520
410
Maximum Temperature: Mechanical, °C 920
960
Melting Completion (Liquidus), °C 1450
1440
Melting Onset (Solidus), °C 1400
1400
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 15
15
Thermal Expansion, µm/m-K 16
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 23
19
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 6.0
3.9
Embodied Energy, MJ/kg 89
54
Embodied Water, L/kg 150
150

Common Calculations

PREN (Pitting Resistance) 22
27
Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
240
Resilience: Unit (Modulus of Resilience), kJ/m3 210
160
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 23
22
Strength to Weight: Bending, points 21
20
Thermal Diffusivity, mm2/s 4.0
4.0
Thermal Shock Resistance, points 14
14

Alloy Composition

Carbon (C), % 0.040 to 0.1
0 to 0.035
Chromium (Cr), % 15.5 to 17.5
17 to 18.2
Copper (Cu), % 0
0 to 1.0
Iron (Fe), % 62.1 to 69.5
62.4 to 69.3
Manganese (Mn), % 0 to 1.5
0 to 2.0
Molybdenum (Mo), % 1.1 to 1.5
2.3 to 2.8
Nickel (Ni), % 12.5 to 14.5
11.5 to 12.5
Niobium (Nb), % 0.4 to 1.2
0
Nitrogen (N), % 0.060 to 0.14
0 to 0.080
Phosphorus (P), % 0 to 0.035
0 to 0.045
Silicon (Si), % 0.3 to 0.6
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.015
Vanadium (V), % 0.6 to 0.85
0