EN 1.7218 (25CrMo4) Chromium-Molybdenum Steel

Other Steels

Material conditionannealed

Overview Chemical Composition Mechanical Properties Physical Properties Other Properties

Property Overview

Density7.8g/cm³

Elastic Modulus190GPa

Tensile Strength610MPa

Yield Strength410MPa

Brinell Hardness180HB

Maximum Service Temperature420°C

Weight Calculator

Chemical Composition

0.22 to 0.29%

0.9 to 1.2%

0 to 0.3%

0.15 to 0.3%

0.6 to 0.9%

0 to 0.4%

0 to 0.035%

0 to 0.3%

0 to 0.040%

96.2 to 98.1%

Mechanical

Elastic (Young's, Tensile) Modulus

190 GPa

Elongation at Break

21 %

Fatigue Strength

290 MPa

Poisson's Ratio

0.29

Shear Modulus

73 GPa

Shear Strength

390 MPa

Tensile Strength: Ultimate (UTS)

610 MPa

Tensile Strength: Yield (Proof)

410 MPa

Hardness

Brinell Hardness

180

Physical

Density

7.8 g/cm 3

Thermal

Latent Heat of Fusion

250 J/g

Maximum Temperature: Mechanical

420 °C

Melting Completion (Liquidus)

1460 °C

Melting Onset (Solidus)

1420 °C

Specific Heat Capacity

470 J/kg-K

Thermal Conductivity

44 W/m-K

Thermal Diffusivity

12 mm 2 /s

Thermal Expansion

13 µm/m-K

Thermal Shock Resistance

18 points

Electrical

Electrical Conductivity: Equal Volume

7.4 % IACS

Electrical Conductivity: Equal Weight (Specific)

8.5 % IACS

Calculated

Resilience: Ultimate (Unit Rupture Work)

120 MJ/m 3

Resilience: Unit (Modulus of Resilience)

450 kJ/m 3

Stiffness to Weight: Axial

13 points

Stiffness to Weight: Bending

24 points

Strength to Weight: Axial

22 points

Strength to Weight: Bending

20 points

Environmental

Base Metal Price

2.6 % relative

Embodied Carbon

1.5 kg CO 2 /kg material

Embodied Energy

20 MJ/kg

Embodied Energy

20 MJ/kg 8.6 x 10 3 BTU/lb

Embodied Water

52 L/kg

Embodied Water

52 L/kg 6.2 gal/lb

Registered Designations & Aliases

1.72181.721825CrMo425CrMo4EN 1.7218 (25CrMo4) Chromium-Molybdenum Steel

Standards

EN 10083-3 EN 10083-3: 2006 Steels for quenching and tempering. Technical delivery conditions for alloy steels

EN 10132-3 EN 10132-3: 2000 Cold rolled narrow steel strip for heat treatment. Technical delivery conditions. Steels for quenching and tempering

EN 10216-2 EN 10216-2: 2014 Seamless steel tubes for pressure purposes. Technical delivery conditions. Non-alloy and alloy steel tubes with specified elevated temperature properties

EN 10216-2 EN 10216-2: Seamless steel tubes for pressure purposes - Technical delivery conditions - Part 2: Non-alloy and alloy steel tubes with specified elevated temperature properties

EN 10216-2 EN 10216-2: Seamless steel tubes for pressure purposes - Technical delivery conditions - Part 2: Non-alloy and alloy steel tubes with specified elevated temperature properties EN 10297-1: Seamless circular steel tubes for mechanical and general engineering purposes - Technical delivery conditions - Part 1: Non-alloy and alloy steel tubes EN 10250-3: Open die steel forgings for general engineering purposes - Part 3: Alloy special steels EN 10269: Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties EN 10263-4: Steel rod, bars and wire for cold heading and cold extrusion - Part 4: Technical delivery conditions for steels for quenching and tempering Creep-Resistant Steels, Fujio Abe et al. (editors), 2008 Pressure Vessels: External Pressure Technology, 2nd ed., Carl T. F. Ross, 2011 Manufacture and Uses of Alloy Steels, Henry D. Hibbard, 2005

EN 10250-3 EN 10250-3: 2000 Open steel die forgings for general engineering purposes. Alloy special steels

EN 10250-3 EN 10250-3: Open die steel forgings for general engineering purposes - Part 3: Alloy special steels

EN 10263-4 EN 10263-4: 2001 Steel rod, bars and wire for cold heading and cold extrusion. Technical delivery conditions for steels for quenching and tempering

EN 10263-4 EN 10263-4: Steel rod, bars and wire for cold heading and cold extrusion - Part 4: Technical delivery conditions for steels for quenching and tempering

EN 10269 EN 10269: 1999 Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties

EN 10269 EN 10269: Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties

EN 10297-1 EN 10297-1: 2003 Seamless circular steel tubes for mechanical and general engineering purposes. Non-alloy and alloy steel tubes. Technical delivery conditions

EN 10297-1 EN 10297-1: Seamless circular steel tubes for mechanical and general engineering purposes - Technical delivery conditions - Part 1: Non-alloy and alloy steel tubes

EN 10305-1 EN 10305-1: 2010 Steel tubes for precision applications. Seamless cold drawn tubes. Technical delivery conditions