EN 1.6311 (20MnMoNi4-5) Molybdenum Steel
Other Steels
Property Overview
Density7.9g/cm³
Elastic Modulus190GPa
Tensile Strength650MPa
Yield Strength420MPa
Brinell Hardness200HB
Maximum Service Temperature410°C
Mechanical
A - Min. elongation at fracture (%) (+QT)
17-18
+QT
A - Min. elongation at fracture (%) transverse, (+QT)
14
+QT
Elastic (Young's, Tensile) Modulus
190 GPa
Impact Strength: V-Notched Charpy
51 J
KV - Impact energy (J) transverse, (+QT)
-20° 27
+QT
KV - Impact energy (J) transverse, (+QT)
0° 40
+QT
KV - Impact energy (J) transverse, (+QT)
+20° 50
+QT
Re - Upper yield strength (MPa) (+QT)
420
+QT
Re - Upper yield strength (MPa) (+QT)
390
+QT
ReH - Minimum yield strength (MPa) (+QT)
470
+QT
ReH - Minimum yield strength (MPa) (+QT)
460
+QT
ReH - Minimum yield strength (MPa) (+QT)
450
+QT
ReH - Minimum yield strength (MPa) (+QT)
440
+QT
ReH - Minimum yield strength (MPa) (+QT)
400
+QT
Rm - Tensile strength (MPa) (+QT)
590-750
+QT
Rm - Tensile strength (MPa) (+QT)
590-730
+QT
Rm - Tensile strength (MPa) (+QT)
570-710
+QT
Rm - Tensile strength (MPa) (+QT)
560-700
+QT
Tensile Strength: Ultimate (UTS)
650 MPa
Tensile Strength: Yield (Proof)
490 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
+A
Thermal
Latent Heat of Fusion
250 J/g
Maximum Temperature: Mechanical
410 °C
Melting Completion (Liquidus)
1460 °C
Melting Onset (Solidus)
1420 °C
Specific Heat Capacity
470 J/kg-K
Thermal Conductivity
39 W/m-K
Thermal Diffusivity
10 mm 2 /s
Thermal Expansion
13 µm/m-K
Thermal Shock Resistance
19 points
Electrical
Electrical Conductivity: Equal Volume
7.4 % IACS
Electrical Conductivity: Equal Weight (Specific)
8.5 % IACS
Other
Nominal thickness (mm):
to 40
Nominal thickness (mm):
40 - 60
Nominal thickness (mm):
60 - 150
Nominal thickness (mm):
150 - 250
Nominal thickness (mm):
60 - 100
Nominal thickness (mm):
100 - 150
Nominal thickness(mm):
to 160
Nominal thickness(mm):
160 - 330
Calculated
PREN (Pitting Resistance)
2.1
Resilience: Ultimate (Unit Rupture Work)
120 MJ/m 3
Resilience: Unit (Modulus of Resilience)
650 kJ/m 3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
24 points
Strength to Weight: Axial
23 points
Strength to Weight: Bending
21 points
Environmental
Base Metal Price
2.9 % relative
Embodied Carbon
1.6 kg CO 2 /kg material
Embodied Energy
22 MJ/kg 9.3 x 10 3 BTU/lb
Embodied Water
51 L/kg 6.1 gal/lb
Registered Designations & Aliases
1.63111.631120MnMoNi4-520MnMoNi4-5EN 1.6311 (20MnMoNi4-5) Molybdenum Steel
Standards
EN 10028-2 EN 10028-2: 2009 Flat products made of steels for pressure purposes. Non-alloy and alloy steels with specified elevated temperature properties
EN 10028-2 EN 10028-2: Flat products made of steels for pressure purposes - Part 2: Non-alloy and alloy steels with specified elevated temperature properties
EN 10028-2 EN 10028-2: Flat products made of steels for pressure purposes - Part 2: Non-alloy and alloy steels with specified elevated temperature properties EN 10250-3: Open die steel forgings for general engineering purposes - Part 3: Alloy special steels 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