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Quenched and Tempered (+QT850) 1.4028 Stainless Steel

EN 1.4028 +QT850 steel is EN 1.4028 stainless steel in the quenched and tempered condition. It has the highest strength compared to the other variants of EN 1.4028 stainless steel. The graph bars on the material properties cards below compare EN 1.4028 +QT850 steel to: wrought martensitic stainless steels (top), all iron alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.

Mechanical Properties

Elastic (Young's, Tensile) Modulus

190 GPa 28 x 106 psi

Elongation at Break

11 %

Fatigue Strength

400 MPa 58 x 103 psi

Impact Strength: V-Notched Charpy

14 J 10 ft-lb

Poisson's Ratio

0.28

Shear Modulus

76 GPa 11 x 106 psi

Shear Strength

550 MPa 80 x 103 psi

Tensile Strength: Ultimate (UTS)

930 MPa 130 x 103 psi

Tensile Strength: Yield (Proof)

730 MPa 110 x 103 psi

Thermal Properties

Latent Heat of Fusion

270 J/g

Maximum Temperature: Corrosion

390 °C 730 °F

Maximum Temperature: Mechanical

760 °C 1390 °F

Melting Completion (Liquidus)

1440 °C 2620 °F

Melting Onset (Solidus)

1400 °C 2550 °F

Specific Heat Capacity

480 J/kg-K 0.11 BTU/lb-°F

Thermal Conductivity

30 W/m-K 17 BTU/h-ft-°F

Thermal Expansion

11 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

2.8 % IACS

Electrical Conductivity: Equal Weight (Specific)

3.2 % IACS

Otherwise Unclassified Properties

Base Metal Price

7.0 % relative

Density

7.7 g/cm3 480 lb/ft3

Embodied Carbon

1.9 kg CO2/kg material

Embodied Energy

27 MJ/kg 12 x 103 BTU/lb

Embodied Water

100 L/kg 12 gal/lb

Common Calculations

PREN (Pitting Resistance)

13

Resilience: Ultimate (Unit Rupture Work)

96 MJ/m3

Resilience: Unit (Modulus of Resilience)

1360 kJ/m3

Stiffness to Weight: Axial

14 points

Stiffness to Weight: Bending

25 points

Strength to Weight: Axial

33 points

Strength to Weight: Bending

27 points

Thermal Diffusivity

8.1 mm2/s

Thermal Shock Resistance

32 points

Alloy Composition

Iron (Fe)Fe 83.1 to 87.7
Chromium (Cr)Cr 12 to 14
Manganese (Mn)Mn 0 to 1.5
Silicon (Si)Si 0 to 1.0
Carbon (C)C 0.26 to 0.35
Phosphorus (P)P 0 to 0.040
Sulfur (S)S 0 to 0.015

All values are % weight. Ranges represent what is permitted under applicable standards.

Followup Questions

Further Reading

EN 10250-4: Open die steel forgings for general engineering purposes - Part 4: Stainless steels

Machining of Stainless Steels and Super Alloys: Traditional and Nontraditional Techniques, Helmi A. Youssef, 2016

EN 10088-3: Stainless steels - Part 3: Technical delivery conditions for semi-finished products, bars, rods, wire, sections and bright products of corrosion resisting steels for general purposes

EN 10088-1: Stainless steels - Part 1: List of stainless steels

Corrosion of Stainless Steels, A. John Sedriks, 1996

Advances in Stainless Steels, Baldev Raj et al. (editors), 2010