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EN 1.4742 Stainless Steel vs. EN 1.4749 Stainless Steel

Both EN 1.4742 stainless steel and EN 1.4749 stainless steel are iron alloys. Both are furnished in the annealed condition. They have a moderately high 90% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4742 stainless steel and the bottom bar is EN 1.4749 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
180
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 17
16
Fatigue Strength, MPa 180
190
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 77
80
Shear Strength, MPa 370
370
Tensile Strength: Ultimate (UTS), MPa 600
600
Tensile Strength: Yield (Proof), MPa 300
320

Thermal Properties

Latent Heat of Fusion, J/g 290
300
Maximum Temperature: Corrosion, °C 410
450
Maximum Temperature: Mechanical, °C 1000
1100
Melting Completion (Liquidus), °C 1420
1420
Melting Onset (Solidus), °C 1380
1380
Specific Heat Capacity, J/kg-K 490
490
Thermal Conductivity, W/m-K 19
17
Thermal Expansion, µm/m-K 11
9.6

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.9
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 2.2
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
13
Density, g/cm3 7.6
7.6
Embodied Carbon, kg CO2/kg material 2.2
2.5
Embodied Energy, MJ/kg 32
36
Embodied Water, L/kg 130
160

Common Calculations

PREN (Pitting Resistance) 18
31
Resilience: Ultimate (Unit Rupture Work), MJ/m3 84
80
Resilience: Unit (Modulus of Resilience), kJ/m3 230
250
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
26
Strength to Weight: Axial, points 22
22
Strength to Weight: Bending, points 21
21
Thermal Diffusivity, mm2/s 5.1
4.6
Thermal Shock Resistance, points 21
22

Alloy Composition

Aluminum (Al), % 0.7 to 1.2
0
Carbon (C), % 0 to 0.12
0.15 to 0.2
Chromium (Cr), % 17 to 19
26 to 29
Iron (Fe), % 77.2 to 81.6
68.5 to 73.7
Manganese (Mn), % 0 to 1.0
0 to 1.0
Nitrogen (N), % 0
0.15 to 0.25
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0.7 to 1.4
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.015