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EN 1.4951 Stainless Steel vs. EN 1.4003 Stainless Steel

Both EN 1.4951 stainless steel and EN 1.4003 stainless steel are iron alloys. They have 66% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4951 stainless steel and the bottom bar is EN 1.4003 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170
180
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 38
22
Fatigue Strength, MPa 190
210
Impact Strength: V-Notched Charpy, J 98
67
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 79
76
Shear Strength, MPa 430
340
Tensile Strength: Ultimate (UTS), MPa 630
540
Tensile Strength: Yield (Proof), MPa 220
320

Thermal Properties

Latent Heat of Fusion, J/g 300
270
Maximum Temperature: Corrosion, °C 450
390
Maximum Temperature: Mechanical, °C 1100
720
Melting Completion (Liquidus), °C 1410
1440
Melting Onset (Solidus), °C 1360
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
25
Thermal Expansion, µm/m-K 16
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 25
6.5
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 4.3
1.9
Embodied Energy, MJ/kg 61
27
Embodied Water, L/kg 190
97

Common Calculations

PREN (Pitting Resistance) 26
12
Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
100
Resilience: Unit (Modulus of Resilience), kJ/m3 130
260
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 22
19
Strength to Weight: Bending, points 21
19
Thermal Diffusivity, mm2/s 3.9
6.7
Thermal Shock Resistance, points 14
19

Alloy Composition

Carbon (C), % 0.040 to 0.080
0 to 0.030
Chromium (Cr), % 24 to 26
10.5 to 12.5
Iron (Fe), % 49.1 to 57
83.9 to 89.2
Manganese (Mn), % 0 to 2.0
0 to 1.5
Nickel (Ni), % 19 to 22
0.3 to 1.0
Nitrogen (N), % 0 to 0.1
0 to 0.030
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0 to 0.7
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.015