Quenched and Tempered (+QT800) 1.4935 Stainless Steel
EN 1.4935 +QT800 steel is EN 1.4935 stainless steel in the quenched and tempered condition. The graph bars on the material properties cards below compare EN 1.4935 +QT800 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
200 GPa 28 x 106 psi
Elongation at Break
16 %
Fatigue Strength
400 MPa 58 x 103 psi
Poisson's Ratio
0.28
Shear Modulus
76 GPa 11 x 106 psi
Shear Strength
540 MPa 78 x 103 psi
Tensile Strength: Ultimate (UTS)
880 MPa 130 x 103 psi
Tensile Strength: Yield (Proof)
670 MPa 97 x 103 psi
Thermal Properties
Latent Heat of Fusion
270 J/g
Maximum Temperature: Corrosion
380 °C 720 °F
Maximum Temperature: Mechanical
740 °C 1360 °F
Melting Completion (Liquidus)
1460 °C 2670 °F
Melting Onset (Solidus)
1420 °C 2590 °F
Specific Heat Capacity
470 J/kg-K 0.11 BTU/lb-°F
Thermal Conductivity
24 W/m-K 14 BTU/h-ft-°F
Thermal Expansion
11 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
2.9 % IACS
Electrical Conductivity: Equal Weight (Specific)
3.3 % IACS
Otherwise Unclassified Properties
Base Metal Price
9.0 % relative
Density
7.8 g/cm3 490 lb/ft3
Embodied Carbon
2.9 kg CO2/kg material
Embodied Energy
42 MJ/kg 18 x 103 BTU/lb
Embodied Water
100 L/kg 12 gal/lb
Common Calculations
PREN (Pitting Resistance)
16
Resilience: Ultimate (Unit Rupture Work)
130 MJ/m3
Resilience: Unit (Modulus of Resilience)
1160 kJ/m3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
25 points
Strength to Weight: Axial
31 points
Strength to Weight: Bending
26 points
Thermal Diffusivity
6.5 mm2/s
Thermal Shock Resistance
30 points
Alloy Composition
| Fe | 83 to 86.7 | |
| Cr | 11 to 12.5 | |
| Mo | 0.8 to 1.2 | |
| Mn | 0.3 to 0.8 | |
| Ni | 0.3 to 0.8 | |
| W | 0.4 to 0.6 | |
| Si | 0.1 to 0.5 | |
| V | 0.2 to 0.35 | |
| C | 0.17 to 0.24 | |
| P | 0 to 0.025 | |
| S | 0 to 0.015 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Further Reading
EN 10302: Creep resisting steels, nickel and cobalt alloys
Creep-Resistant Steels, Fujio Abe et al. (editors), 2008
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
CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015