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EN 1.4988 Stainless Steel vs. EN 1.4886 Stainless Steel

Both EN 1.4988 stainless steel and EN 1.4886 stainless steel are iron alloys. They have 75% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4988 stainless steel and the bottom bar is EN 1.4886 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
170
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 34
45
Fatigue Strength, MPa 230
280
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
76
Shear Strength, MPa 430
400
Tensile Strength: Ultimate (UTS), MPa 640
580
Tensile Strength: Yield (Proof), MPa 290
300

Thermal Properties

Latent Heat of Fusion, J/g 290
320
Maximum Temperature: Corrosion, °C 520
420
Maximum Temperature: Mechanical, °C 920
1100
Melting Completion (Liquidus), °C 1450
1390
Melting Onset (Solidus), °C 1400
1340
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 15
12
Thermal Expansion, µm/m-K 16
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 23
31
Density, g/cm3 7.9
8.0
Embodied Carbon, kg CO2/kg material 6.0
5.4
Embodied Energy, MJ/kg 89
76
Embodied Water, L/kg 150
190

Common Calculations

PREN (Pitting Resistance) 22
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
220
Resilience: Unit (Modulus of Resilience), kJ/m3 210
230
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 23
20
Strength to Weight: Bending, points 21
19
Thermal Diffusivity, mm2/s 4.0
3.1
Thermal Shock Resistance, points 14
14

Alloy Composition

Carbon (C), % 0.040 to 0.1
0 to 0.15
Chromium (Cr), % 15.5 to 17.5
17 to 20
Iron (Fe), % 62.1 to 69.5
38.7 to 49
Manganese (Mn), % 0 to 1.5
0 to 2.0
Molybdenum (Mo), % 1.1 to 1.5
0
Nickel (Ni), % 12.5 to 14.5
33 to 37
Niobium (Nb), % 0.4 to 1.2
0
Nitrogen (N), % 0.060 to 0.14
0 to 0.1
Phosphorus (P), % 0 to 0.035
0 to 0.030
Silicon (Si), % 0.3 to 0.6
1.0 to 2.0
Sulfur (S), % 0 to 0.015
0 to 0.015
Vanadium (V), % 0.6 to 0.85
0