| Grade : | 34CrMo4 |
| Number: | 1.7220 |
| Classification: | Alloy special steel |
| 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. Technical delivery conditions | |
| Equivalent grades: | Go here |
Chemical composition % of steel 34CrMo4 (1.7220): EN 10083-3-2006
| C | Si | Mn | P | S | Cr | Mo |
| 0.3 - 0.37 | max 0.4 | 0.6 - 0.9 | max 0.025 | max 0.035 | 0.9 - 1.2 | 0.15 - 0.3 |
Mechanical properties of steel 34CrMo4 (1.7220)
| Nominal diameter (mm): | to 16 | 16 - 40 | 40 - 100 | 100 - 160 | 160 - 250 |
| Rm - Tensile strength (MPa) (+QT) | 1000-1200 | 900-1100 | 800-950 | 750-900 | 700-850 |
| Nominal thickness (mm): | 0.3 - 3 |
| Rm - Tensile strength (MPa) (+A) | 600 |
| Nominal thickness (mm): | to 8 | 8 - 20 | 20 - 50 | 50 - 80 |
| Rm - Tensile strength (MPa) (+QT) | 1000 | 900 | 800 | 750 |
| Nominal diameter(mm): or for flat products thickness: to 8; 8-20; 20-60; 60-100; 100-160; | to 16 | 16 - 40 | 40 - 100 | 100 - 160 | 160 - 330 |
Re - Upper yield strength or
Rp0.2 - 0.2% proof strength (MPa) (+QT) | 800 | 650 | 550 | 450-500 | 410-450 |
| 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 16 | 16 - 40 | 40 - 100 | 100 - 160 | 160 - 250 |
| A - Min. elongation Lo = 5,65 √ So (%) (+QT), round products | 11 | 12 | 14 | 15 | 15 |
| Nominal diameter (mm): or for flat products thickness: to 8; 8-20; 20-60; 60-100; 100-160; | to 16 | 16 - 40 | 40 - 100 | 100 - 160 | 160 - 250 |
| Z - Reduction in cross section on fracture (%) (+QT) | 45 | 50 | 55 | 55 | 60 |
| 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 steel 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 steel 34CrMo4 (1.7220)
Warning! Only for reference
EU
EN | USA
- | Germany
DIN,WNr | Japan
JIS | France
AFNOR | England
BS | Italy
UNI | China
GB | Sweden
SS | Finland
SFS | Russia
GOST | Inter
ISO |
| 34CrMo4 | | | | | | | | | | | |
