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34CrMo4
Qilu
Product Description
DIN 34CrMo4/1.7220 QT Alloy Structrural Steel
1: 34CrMo4 Steel Introduction
34CrMo4 has high rupture strength and creep strength at high temperature, good impact toughness at low temperature, good hardenability, no tendency to overheat, small quenching deformation, good plasticity and workability at cold shape. Poor weldability, need preheating before welding, heat treatment and stress relief after welding, generally used after quenching and tempering treatment, also can be used after high and medium frequency surface quenching or quenching and low and medium temperature tempering.
34CrMo4 Steel Stock In Warehouse
2: 34CrMo4 Quality Standard
DIN17200 1987-ENG Steels-for-Quenching-and-Tempering.pdf
3: 34CrMo4 Steel Equivalent
| Country | China | Japan | Germany | USA |
| Standard | GB/T | JIS | DIN (W-Nr.) DIN 17200 | AISI/ASTM |
| Grade | / | / | 34CrMo4/1.7220 | / |
4: 34CrMo4 Steel Chemical Composition
| Grade | C | Si | Mn | P | S | Cr | Mo |
| 34CrMo4/1.7220 | 0.22-0.29 | 0.40 | 0.60-0.90 | 0.035 | 0.02-0.035 | 0.90-1.20 | 0.15-0.30 |
5: 34CrMo4 Steel Mechanical Properties
The mechanical properties mainly include tensile strength, yield strength, elongation, area or reduction, hardness, impact value, non-metalic inclusion etc. Different heat treatment, the mechanical properties will be different, such as normalized, tempered, QT. If you want to know the properties, kindly contact the salesman.
6: 34CrMo4 Steel Overviews
| Size | Round | Dia 6-1200mm |
| Plate/Flat/Block | Thickness 6mm-500mm | |
| Width 20mm-1000mm | ||
| Heat treatment | Normalized ; Annealed ; Quenched ; Tempered | |
| Surface condition | Black; Peeled; Polished; Machined; Grinded; Turned; Milled | |
| Delivery condition | Forged; Hot rolled; Cold drawn | |
| Test | Tensile strength, Yield strength, elongation, area of reduction, impact value, hardness, grain size, ultrasonic test, US inspection, magnetic particle testing, etc. | |
| Payment terms | T/T;L/C;/Money gram/ Paypal | |
| Trade terms | FOB; CIF; C&F; etc.. | |
| Delivery time | 30-45 days | |
7: 34CrMo4 Steel Application
34CrMo4 is mainly used as important structural parts working under high load, such as transmission parts of vehicles and engines; rotor, main shaft, heavy load transmission shaft of steam turbine generator, large-section parts 34CrMo4 are used to manufacture forgings requiring higher strength and larger quenching and tempering section than 35CrMo steel. For example, large gear for locomotive traction, supercharger transmission gear, rear axle, extremely loaded connecting rod and spring clamp, 34CrMo4 can also be used for drill pipe joint and fishing tools in deep oil wells below 2000m.
8: 34CrMo4 Steel Heat Treatment
Normalizing: 850 - 880°C, air cooled
Soft annealing: 650 - 680°C, furnace cooled, max. hardness 223 HB
Hardened: 830 - 890°C, quenched in oil or water
Tempering: 540 - 680°C, air cooled
9: 34CrMo4 Steel Tolerance
Diameter(mm) | Tolerance | ||
Forged Steel Round Bar | 80-600 | Black Surface:0~+5 | Rough Machined or Turned:0~+3 |
650-1200 | Black Surface:0~+15 | Rough Machined or Turned:0~+3 | |
Hot Rolled Steel Round Bar | 16-310 | Black Surface:0~+1 | Peeled:H11 |
Cold Drawn Steel Round Bar | 6-100 | Black Surface:H11 | Peeled:H11 |
10: Delivery Condition
For hot forged bar, usually the delivery condition is hot forged, annealed rough turned/Black surface.
For hot rolled bar, usually the delivery condition is hot rolled, annealed, Black surface.
For hot forged plate, usually the delivery condition is hot forged, annealed, milled surface.
For hot rolled plate, usually the delivery condition is hot rolled, annealed, black surface.
