EN 1.7779 (20CrMoV13-5-5) Chromium Steel
Other Steels
Property Overview
Density7.8g/cm³
Elastic Modulus190GPa
Tensile Strength810MPa
Yield Strength590MPa
Brinell Hardness240HB
Maximum Service Temperature470°C
Chemical Composition
C
0.17 to 0.23%
CR
3.0 to 3.3%
NI
0 to 0.3%
MO
0.5 to 0.6%
MN
0.3 to 0.5%
SI
0.15 to 0.35%
P
0 to 0.025%
S
0 to 0.010%
CU
0 to 0.3%
V
0.45 to 0.55%
AL
0 to 0.040%
FE
93.8 to 95.4%
Mechanical
A - Min. elongation at fracture (%) longitud., (+QT)
16
+QT
A - Min. elongation at fracture (%) transverse, (+QT)
14
+QT
Elastic (Young's, Tensile) Modulus
190 GPa
Elongation at Break
16 %
Fatigue Strength
430 MPa
Impact Strength: V-Notched Charpy
38 J
KV - Impact energy (J) longitud., (+QT)
+20° 40
+QT
KV - Impact energy (J) transverse, (+QT)
+20° 27
+QT
Poisson's Ratio
0.29
ReH - Minimum yield strength (MPa) (+QT)
590
+QT
Rm - Tensile strength (MPa) (+QT)
740-880
+QT
Shear Modulus
73 GPa
Shear Strength
500 MPa
Tensile Strength: Ultimate (UTS)
810 MPa
Tensile Strength: Yield (Proof)
660 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
240
Physical
Density
7.8 g/cm 3
Thermal
Latent Heat of Fusion
260 J/g
Maximum Temperature: Mechanical
470 °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
11 mm 2 /s
Thermal Expansion
13 µm/m-K
Thermal Shock Resistance
23 points
Electrical
Electrical Conductivity: Equal Volume
7.7 % IACS
Electrical Conductivity: Equal Weight (Specific)
8.9 % IACS
Calculated
PREN (Pitting Resistance)
5.0
Resilience: Ultimate (Unit Rupture Work)
120 MJ/m 3
Resilience: Unit (Modulus of Resilience)
1150 kJ/m 3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
24 points
Strength to Weight: Axial
29 points
Strength to Weight: Bending
25 points
Environmental
Base Metal Price
4.0 % relative
Embodied Carbon
2.8 kg CO 2 /kg material
Embodied Energy
41 MJ/kg
Embodied Energy
41 MJ/kg 18 x 10 3 BTU/lb
Embodied Water
64 L/kg
Embodied Water
64 L/kg 7.7 gal/lb
Registered Designations & Aliases
1.77791.777920CrMoV13-5-520CrMoV13-5-5EN 1.7779 (20CrMoV13-5-5) Chromium 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