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Quenched and Tempered (+QT1) 1.4525 Stainless Steel

EN 1.4525 +QT1 steel is EN 1.4525 stainless steel in the quenched and tempered condition. The graph bars on the material properties cards below compare EN 1.4525 +QT1 steel to: cast 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

13 %

Fatigue Strength

480 MPa 69 x 103 psi

Impact Strength: V-Notched Charpy

23 J 17 ft-lb

Poisson's Ratio

0.28

Shear Modulus

76 GPa 11 x 106 psi

Tensile Strength: Ultimate (UTS)

1030 MPa 150 x 103 psi

Tensile Strength: Yield (Proof)

840 MPa 120 x 103 psi

Thermal Properties

Latent Heat of Fusion

280 J/g

Maximum Temperature: Corrosion

430 °C 810 °F

Maximum Temperature: Mechanical

860 °C 1580 °F

Melting Completion (Liquidus)

1430 °C 2600 °F

Melting Onset (Solidus)

1390 °C 2530 °F

Specific Heat Capacity

480 J/kg-K 0.11 BTU/lb-°F

Thermal Conductivity

18 W/m-K 10 BTU/h-ft-°F

Thermal Expansion

11 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

2.2 % IACS

Electrical Conductivity: Equal Weight (Specific)

2.6 % IACS

Otherwise Unclassified Properties

Base Metal Price

13 % relative

Density

7.8 g/cm3 490 lb/ft3

Embodied Carbon

2.8 kg CO2/kg material

Embodied Energy

39 MJ/kg 17 x 103 BTU/lb

Embodied Water

130 L/kg 16 gal/lb

Common Calculations

PREN (Pitting Resistance)

18

Resilience: Ultimate (Unit Rupture Work)

130 MJ/m3

Resilience: Unit (Modulus of Resilience)

1820 kJ/m3

Stiffness to Weight: Axial

14 points

Stiffness to Weight: Bending

25 points

Strength to Weight: Axial

36 points

Strength to Weight: Bending

29 points

Thermal Diffusivity

4.7 mm2/s

Thermal Shock Resistance

34 points

Alloy Composition

Iron (Fe)Fe 70.4 to 79
Chromium (Cr)Cr 15 to 17
Nickel (Ni)Ni 3.5 to 5.5
Copper (Cu)Cu 2.5 to 4.0
Manganese (Mn)Mn 0 to 1.0
Silicon (Si)Si 0 to 0.8
Molybdenum (Mo)Mo 0 to 0.8
Niobium (Nb)Nb 0 to 0.35
Carbon (C)C 0 to 0.070
Nitrogen (N)N 0 to 0.050
Phosphorus (P)P 0 to 0.035
Sulfur (S)S 0 to 0.025

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

Followup Questions

Further Reading

EN 10283: Corrosion resistant steel castings

Corrosion of Stainless Steels, A. John Sedriks, 1996

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