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34CrMo4   ( 1.7220 )

Grade : 34CrMo4
Number: 1.7220
Standard:
    EN 10083 - 3 : 2006   Steels for quenching and tempering. Technical delivery conditions for alloy steels
    EN 10132 - 3 : 2000   Cold rolled narrow steel strip for heat treatment. Technical delivery conditions. Steels for quenching and tempering
    EN 10263 - 4 : 2001   Steel rod, bars and wire for cold heading and cold extrusion. Technical delivery conditions for steels for quenching and tempering
    EN 10250 - 3 : 2000   Open steel die forgings for general engineering purposes. Alloy special steels
    EN 10297 - 1 : 2003   Seamless circular steel tubes for mechanical and general engineering purposes. Non-alloy and alloy steel tubes
Classification: Alloy special steel
Equivalent grades: Go here

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Chemical composition %   of grade   34CrMo4 (1.7220)
C Si Mn P S Cr Mo
0.3 - 0.37max   0.40.6 - 0.9max   0.025max   0.0350.9 - 1.20.15 - 0.3


Mechanical properties of grade   34CrMo4 (1.7220)

Nominal diameter (mm):   to 1616 - 4040 - 100100 - 160160 - 250
Rm - Tensile strength (MPa) (+QT)1000-1200900-1100800-950750-900700-850
Nominal thickness (mm):   0.3 - 3
Rm - Tensile strength (MPa) (+A)600
Nominal thickness (mm):   to 88 - 2020 - 5050 - 80
Rm - Tensile strength (MPa) (+QT)1000900800750


Nominal diameter(mm):   or for flat products thickness: to 8; 8-20; 20-60; 60-100; 100-160; to 1616 - 4040 - 100100 - 160160 - 330
Re - Upper yield strength or
Rp0.2 - 0.2% proof strength (MPa) (+QT)
800650550450-500410-450
Nominal thickness(mm):   0.3 - 3
Rp0.2 0.2% proof strength (MPa) (+A)460


KV - Impact energy (J) longitud., (+QT)+20°
35-45
KV - Impact energy (J) transverse, (+QT)+20°
25-27


Nominal thickness (mm):     0.3 - 3
A - Min. elongation Lo = 80 mm (%) (+A)16
A - Min. elongation at fracture (%) transverse, (+QT)10-12


Nominal thickness (mm):     to 1616 - 4040 - 100100 - 160160 - 250
A - Min. elongation Lo = 5,65 √ So (%) (+QT), round products 1112141515


Nominal diameter (mm):     or for flat products thickness: to 8; 8-20; 20-60; 60-100; 100-160; to 1616 - 4040 - 100100 - 160160 - 250
Z - Reduction in cross section on fracture (%) (+QT)4550555560
Z - Reduction in cross section on fracture (%) (+AC)60


  Brinell hardness   (HBW):   (+S)255
  Brinell hardness   (HBW):   (+A)223
  Vickers hardness  ( HV):   (+A)185
  Vickers hardness  ( HV):   (+QT)315 - 465


Properties of grade   34CrMo4 (1.7220)
Weldability: Low weldability; this steel grade can be welded only with suitable precautions.
Hardenability: Steel grade with medium carbon content showing a poor hardenability; sensitive to notching and to quenching cracks.


Equivalent grades of grade   34CrMo4 (1.7220)
Warning! Only for reference
USA
-
Germany
DIN,WNr
Japan
JIS
France
AFNOR
England
BS
Italy
UNI
China
GB
Sweden
SS
Finland
SFS
Russia
GOST
Inter
ISO
4135
34CrMo4
SCM435H
34CD4
35CD4
708A30
708M32
35CrMo4
35CrMo
ZG35CrMo
2234
25CrMo4
35KHM
35KHML
34CrMo4
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Mechanical properties
Mechanische Eigenschaften
Caracteristiques mecaniques
ReH Minimum yield strength / Mindestwert der oberen Streckgrenze / Limite delasticite minimale
Rm Tensile strength / Zugfestigkeit / Resistance a la traction
A Minimum elongation / Mindestwert der Bruchdehnung / Allongement minimal
J Notch impact test / Kerbschlagbiegeversuch / Essai de flexion par choc


Heat treatment conditions
+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

Chemical composition of   34CrMo4 (1.7220). Equivalent grades of   34CrMo4 (1.7220). Standards of   34CrMo4 (1.7220).
Properties of   34CrMo4 (1.7220). Hardness of   34CrMo4 (1.7220). Strength of   34CrMo4 (1.7220). Elongation of   34CrMo4 (1.7220).

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