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EN 1.4749 Stainless Steel vs. EN 1.4945 Stainless Steel

Both EN 1.4749 stainless steel and EN 1.4945 stainless steel are iron alloys. They have 79% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4749 stainless steel and the bottom bar is EN 1.4945 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
200 to 220
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 16
19 to 34
Fatigue Strength, MPa 190
230 to 350
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 80
77
Shear Strength, MPa 370
430 to 460
Tensile Strength: Ultimate (UTS), MPa 600
640 to 740
Tensile Strength: Yield (Proof), MPa 320
290 to 550

Thermal Properties

Latent Heat of Fusion, J/g 300
290
Maximum Temperature: Corrosion, °C 450
520
Maximum Temperature: Mechanical, °C 1100
920
Melting Completion (Liquidus), °C 1420
1490
Melting Onset (Solidus), °C 1380
1440
Specific Heat Capacity, J/kg-K 490
470
Thermal Conductivity, W/m-K 17
14
Thermal Expansion, µm/m-K 9.6
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
3.2

Otherwise Unclassified Properties

Base Metal Price, % relative 13
30
Density, g/cm3 7.6
8.1
Embodied Carbon, kg CO2/kg material 2.5
5.0
Embodied Energy, MJ/kg 36
73
Embodied Water, L/kg 160
150

Common Calculations

PREN (Pitting Resistance) 31
23
Resilience: Ultimate (Unit Rupture Work), MJ/m3 80
130 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 250
210 to 760
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 26
24
Strength to Weight: Axial, points 22
22 to 25
Strength to Weight: Bending, points 21
20 to 22
Thermal Diffusivity, mm2/s 4.6
3.7
Thermal Shock Resistance, points 22
14 to 16

Alloy Composition

Carbon (C), % 0.15 to 0.2
0.040 to 0.1
Chromium (Cr), % 26 to 29
15.5 to 17.5
Iron (Fe), % 68.5 to 73.7
57.9 to 65.7
Manganese (Mn), % 0 to 1.0
0 to 1.5
Nickel (Ni), % 0
15.5 to 17.5
Niobium (Nb), % 0
0.4 to 1.2
Nitrogen (N), % 0.15 to 0.25
0.060 to 0.14
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 1.0
0.3 to 0.6
Sulfur (S), % 0 to 0.015
0 to 0.015
Tungsten (W), % 0
2.5 to 3.5