EN 1.5450 (8MoB5-4) Molybdenum Steel

Other Steels

Overview Chemical Composition Mechanical Properties Physical Properties Other Properties

Property Overview

Density7.9g/cm³

Elastic Modulus190GPa

Tensile Strength620MPa

Yield Strength400MPa

Brinell Hardness190HB

Maximum Service Temperature410°C

Weight Calculator

Chemical Composition

0.060 to 0.1%

0 to 0.2%

0.4 to 0.5%

0.6 to 0.8%

0.1 to 0.35%

0 to 0.025%

0 to 0.010%

0 to 0.3%

0 to 0.060%

0.0020 to 0.0060%

97.6 to 98.8%

Mechanical

A - Min. elongation at fracture (%) longitud., (+N)

A - Min. elongation at fracture (%) transverse, (+N)

Elastic (Young's, Tensile) Modulus

190 GPa

Elongation at Break

19 %

Fatigue Strength

310 MPa

Impact Strength: V-Notched Charpy

38 J

KV - Impact energy (J) longitud., (+N)

+20° 40

KV - Impact energy (J) transverse, (+N)

+20° 27

Poisson's Ratio

0.29

ReH - Minimum yield strength (MPa) (+N)

400

Rm - Tensile strength (MPa) (+N)

540-690

Shear Modulus

73 GPa

Shear Strength

380 MPa

Tensile Strength: Ultimate (UTS)

620 MPa

Tensile Strength: Yield (Proof)

460 MPa

Hardness

+A Soft annealed +AC Annealed to achieve spheroidization of the carbides +AR As rolled +AT Solution annealed +C Cold drawn / hard +CR Cold rolled +FP Treated to ferrite-pearlite structure and hardness range +I Isothermal annealing +LC Cold drawn / soft +M Thermo mechanical rolling +N Normalized +NT Normalized and tempered

+P Precipitation hardened +PE Peeled +QA Air quenched and tempered +QL Liquid quenched and tempered +QT Quenched and tempered +S Treated to improve shearability +SH As rolled and turned +SR Cold drawn and stress relieved +T Tempered +TH Treated to hardness range +WW Warm worked +U Untreated

Brinell Hardness

190

Physical

Density

7.9 g/cm 3

Thermal

Latent Heat of Fusion

250 J/g

Maximum Temperature: Mechanical

410 °C

Melting Completion (Liquidus)

1470 °C

Melting Onset (Solidus)

1420 °C

Specific Heat Capacity

470 J/kg-K

Thermal Conductivity

49 W/m-K

Thermal Diffusivity

13 mm 2 /s

Thermal Expansion

13 µm/m-K

Thermal Shock Resistance

18 points

Electrical

Electrical Conductivity: Equal Volume

7.2 % IACS

Electrical Conductivity: Equal Weight (Specific)

8.2 % IACS

Calculated

Resilience: Ultimate (Unit Rupture Work)

110 MJ/m 3

Resilience: Unit (Modulus of Resilience)

550 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

2.4 % 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

49 L/kg

Embodied Water

49 L/kg 5.8 gal/lb

Registered Designations & Aliases

1.54501.54508MoB5-48MoB5-4EN 1.5450 (8MoB5-4) Molybdenum Steel

Standards

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 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