EN 1.7219 (26CrMo4-2) Chromium-Molybdenum Steel
Other Steels
Property Overview
Density7.8g/cm³
Elastic Modulus190GPa
Tensile Strength650MPa
Yield Strength440MPa
Brinell Hardness200HB
Maximum Service Temperature420°C
Chemical Composition
C
0.22 to 0.29%
CR
0.9 to 1.2%
MO
0.15 to 0.3%
MN
0.5 to 0.8%
SI
0 to 0.35%
P
0 to 0.025%
S
0 to 0.010%
CU
0 to 0.3%
FE
96.7 to 98.2%
Mechanical
A - Min. elongation at fracture (%) longitud., (+QT)
18
+QT
A - Min. elongation at fracture (%) transverse, (+QT)
16
+QT
Elastic (Young's, Tensile) Modulus
190 GPa
Elongation at Break
19 %
Fatigue Strength
340 MPa
Impact Strength: V-Notched Charpy
57 J
KV - Impact energy (J) longitud., (+QT)
-60° 40
+QT
KV - Impact energy (J) longitud., (+QT)
-50° 40
+QT
KV - Impact energy (J) longitud., (+QT)
-40° 45
+QT
KV - Impact energy (J) longitud., (+QT)
-20° 50
+QT
KV - Impact energy (J) longitud., (+QT)
+20° 60
+QT
KV - Impact energy (J) transverse, (+QT)
-60° 27
+QT
KV - Impact energy (J) transverse, (+QT)
-50° 27
+QT
KV - Impact energy (J) transverse, (+QT)
-40° 30
+QT
KV - Impact energy (J) transverse, (+QT)
-20° 35
+QT
KV - Impact energy (J) transverse, (+QT)
+20° 40
+QT
Poisson's Ratio
0.29
R p0.2 0.2% proof strength (MPa) (+QT)
440
+QT
Rm - Tensile strength (MPa) (+QT)
560-740
+QT
Shear Modulus
73 GPa
Shear Strength
400 MPa
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
Brinell Hardness
200
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
19 points
Electrical
Electrical Conductivity: Equal Volume
7.3 % IACS
Electrical Conductivity: Equal Weight (Specific)
8.4 % IACS
Calculated
Resilience: Ultimate (Unit Rupture Work)
110 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
2.5 % relative
Embodied Carbon
1.5 kg CO 2 /kg material
Embodied Energy
20 MJ/kg
Embodied Energy
20 MJ/kg 8.5 x 10 3 BTU/lb
Embodied Water
51 L/kg
Embodied Water
51 L/kg 6.1 gal/lb
Registered Designations & Aliases
1.72191.721926CrMo4-226CrMo4-2EN 1.7219 (26CrMo4-2) Chromium-Molybdenum Steel
Standards
EN 10216-4 EN 10216-4: 2014 Seamless steel tubes for pressure purposes. Technical delivery conditions. Non-alloy and alloy steel tubes with specified low temperature properties
EN 10216-4 EN 10216-4: Seamless steel tubes for pressure purposes - Technical delivery conditions - Part 4: Non-alloy and alloy steel tubes with specified low temperature properties
EN 10216-4 EN 10216-4: Seamless steel tubes for pressure purposes - Technical delivery conditions - Part 4: Non-alloy and alloy steel tubes with specified low temperature properties Pressure Vessels: External Pressure Technology, 2nd ed., Carl T. F. Ross, 2011 Manufacture and Uses of Alloy Steels, Henry D. Hibbard, 2005