MakeItFrom.com
Menu (ESC)

EN 1.4122 (X39CrMo17-1) Stainless Steel

EN 1.4122 stainless steel is a martensitic stainless steel formulated for primary forming into wrought products. 1.4122 is the EN numeric designation for this material. X39CrMo17-1 is the EN chemical designation.

It has a fairly low electrical conductivity among wrought martensitic stainless steels. In addition, it has a fairly low thermal conductivity and a moderately low ductility.

The properties of EN 1.4122 stainless steel include two common variations. This page shows summary ranges across both of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare EN 1.4122 stainless 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 29 x 106 psi

Elongation at Break

14 %

Fatigue Strength

260 to 360 MPa 38 to 52 x 103 psi

Poisson's Ratio

0.28

Shear Modulus

77 GPa 11 x 106 psi

Shear Strength

480 to 520 MPa 70 to 75 x 103 psi

Tensile Strength: Ultimate (UTS)

790 to 850 MPa 110 to 120 x 103 psi

Tensile Strength: Yield (Proof)

450 to 630 MPa 66 to 91 x 103 psi

Thermal Properties

Latent Heat of Fusion

280 J/g

Maximum Temperature: Corrosion

400 °C 750 °F

Maximum Temperature: Mechanical

870 °C 1590 °F

Melting Completion (Liquidus)

1440 °C 2630 °F

Melting Onset (Solidus)

1400 °C 2550 °F

Specific Heat Capacity

480 J/kg-K 0.11 BTU/lb-°F

Thermal Conductivity

15 W/m-K 8.7 BTU/h-ft-°F

Thermal Expansion

10 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

2.2 % IACS

Electrical Conductivity: Equal Weight (Specific)

2.5 % IACS

Otherwise Unclassified Properties

Base Metal Price

9.5 % relative

Density

7.7 g/cm3 480 lb/ft3

Embodied Carbon

2.4 kg CO2/kg material

Embodied Energy

33 MJ/kg 14 x 103 BTU/lb

Embodied Water

120 L/kg 14 gal/lb

Common Calculations

PREN (Pitting Resistance)

20

Resilience: Ultimate (Unit Rupture Work)

93 to 110 MJ/m3

Resilience: Unit (Modulus of Resilience)

520 to 1000 kJ/m3

Stiffness to Weight: Axial

14 points

Stiffness to Weight: Bending

25 points

Strength to Weight: Axial

28 to 31 points

Strength to Weight: Bending

25 to 26 points

Thermal Diffusivity

4.0 mm2/s

Thermal Shock Resistance

28 to 30 points

Alloy Composition

Among wrought stainless steels, the composition of EN 1.4122 stainless steel is notable for containing comparatively high amounts of chromium (Cr) and molybdenum (Mo). Chromium is the defining alloying element of stainless steel. Higher chromium content imparts additional corrosion resistance. Molybdenum is used to facilitate tempering. In addition, it offers modest bonuses to a wide range of material properties.

Iron (Fe) 77.2 to 83.4
Chromium (Cr) 15.5 to 17.5
Molybdenum (Mo) 0.8 to 1.3
Manganese (Mn) 0 to 1.5
Silicon (Si) 0 to 1.0
Nickel (Ni) 0 to 1.0
Carbon (C) 0.33 to 0.45
Phosphorus (P) 0 to 0.040
Sulfur (S) 0 to 0.015

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

Followup Questions

Similar Alloys

Further Reading

EN 10088-2: Stainless steels - Part 2: Technical delivery conditions for sheet/plate and strip of corrosion resisting steels for general purposes

Welding Metallurgy, 2nd ed., Sindo Kou, 2003

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

Welding Metallurgy and Weldability of Stainless Steels, John C. Lippold and Damian J. Kotecki, 2005

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