EN 1.0471 (20MnNb6) Non-Alloy Steel
Other Steels
Property Overview
Density7.8g/cm³
Elastic Modulus190GPa
Tensile Strength580MPa
Yield Strength355MPa
Brinell Hardness170HB
Maximum Service Temperature400°C
Chemical Composition
C
0 to 0.22%
MN
1.0 to 1.5%
SI
0.15 to 0.35%
P
0 to 0.025%
S
0 to 0.010%
CU
0 to 0.3%
NB
0.015 to 0.1%
AL
0 to 0.060%
FE
97.4 to 98.8%
Mechanical
A - Min. elongation at fracture (%) longitud., (+N)
22
+N
A - Min. elongation at fracture (%) transverse, (+N)
20
+N
Elastic (Young's, Tensile) Modulus
190 GPa
Elongation at Break
23 %
Fatigue Strength
270 MPa
Impact Strength: V-Notched Charpy
38 J
KV - Impact energy (J) longitud., (+N)
0° 40
+N
KV - Impact energy (J) transverse, (+N)
0° 27
+N
Poisson's Ratio
0.29
ReH - Minimum yield strength (MPa) (+N)
355
+N
ReH - Minimum yield strength (MPa) (+N)
345
+N
ReH - Minimum yield strength (MPa) (+N)
335
+N
Rm - Tensile strength (MPa) (+N)
500-650
+N
Shear Modulus
73 GPa
Shear Strength
360 MPa
Tensile Strength: Ultimate (UTS)
580 MPa
Tensile Strength: Yield (Proof)
380 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
Brinell Hardness
170
Physical
Density
7.8 g/cm 3
Thermal
Latent Heat of Fusion
250 J/g
Maximum Temperature: Mechanical
400 °C
Melting Completion (Liquidus)
1460 °C
Melting Onset (Solidus)
1420 °C
Specific Heat Capacity
470 J/kg-K
Thermal Conductivity
52 W/m-K
Thermal Diffusivity
14 mm 2 /s
Thermal Expansion
12 µm/m-K
Thermal Shock Resistance
18 points
Electrical
Electrical Conductivity: Equal Volume
7.2 % IACS
Electrical Conductivity: Equal Weight (Specific)
8.2 % IACS
Other
Nominal thickness (mm):
to 16
Nominal thickness (mm):
16 - 40
Nominal thickness (mm):
40 - 60
Calculated
Resilience: Ultimate (Unit Rupture Work)
120 MJ/m 3
Resilience: Unit (Modulus of Resilience)
390 kJ/m 3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
24 points
Strength to Weight: Axial
20 points
Strength to Weight: Bending
20 points
Environmental
Base Metal Price
2.2 % relative
Embodied Carbon
1.5 kg CO 2 /kg material
Embodied Energy
20 MJ/kg
Embodied Energy
20 MJ/kg 8.4 x 10 3 BTU/lb
Embodied Water
48 L/kg
Embodied Water
48 L/kg 5.7 gal/lb
Registered Designations & Aliases
1.04711.047120MnNb620MnNb6EN 1.0471 (20MnNb6) Non-Alloy 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