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EN 1.4951 Stainless Steel vs. EN 1.4887 Stainless Steel

Both EN 1.4951 stainless steel and EN 1.4887 stainless steel are iron alloys. Both are furnished in the solution annealed (AT) condition. They have 83% 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 1.4951 stainless steel and the bottom bar is EN 1.4887 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170
170
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 38
45
Fatigue Strength, MPa 190
280
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 79
76
Shear Strength, MPa 430
400
Tensile Strength: Ultimate (UTS), MPa 630
580
Tensile Strength: Yield (Proof), MPa 220
300

Thermal Properties

Latent Heat of Fusion, J/g 300
320
Maximum Temperature: Corrosion, °C 450
600
Maximum Temperature: Mechanical, °C 1100
1100
Melting Completion (Liquidus), °C 1410
1390
Melting Onset (Solidus), °C 1360
1350
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
12
Thermal Expansion, µm/m-K 16
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 25
39
Density, g/cm3 7.9
8.0
Embodied Carbon, kg CO2/kg material 4.3
6.7
Embodied Energy, MJ/kg 61
96
Embodied Water, L/kg 190
210

Common Calculations

PREN (Pitting Resistance) 26
22
Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
220
Resilience: Unit (Modulus of Resilience), kJ/m3 130
230
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 22
20
Strength to Weight: Bending, points 21
19
Thermal Diffusivity, mm2/s 3.9
3.2
Thermal Shock Resistance, points 14
14

Alloy Composition

Carbon (C), % 0.040 to 0.080
0 to 0.15
Chromium (Cr), % 24 to 26
20 to 23
Iron (Fe), % 49.1 to 57
34.2 to 45
Manganese (Mn), % 0 to 2.0
0 to 2.0
Nickel (Ni), % 19 to 22
33 to 37
Niobium (Nb), % 0
1.0 to 1.5
Nitrogen (N), % 0 to 0.1
0 to 0.1
Phosphorus (P), % 0 to 0.035
0 to 0.030
Silicon (Si), % 0 to 0.7
1.0 to 2.0
Sulfur (S), % 0 to 0.015
0 to 0.015