DIN 1.6582|34CrNiMo6 Alloy Steel
DIN1.6582/34CrNiMo6 steel is a heat treatable, low alloy steel,used for a wide range of engineering parts. It is capable of being heat treated to produce a typical tensile strength of 1000 -1200 N/mm² which combined with good ductility and resistance to shock. It also has good hardenability,enabling it to be used for medium tensile strengths in fairly large sections, and attain good wear resistance,good impact property at low temperatures.this material is readily machinable so that the components can be put into service without the cost of further treatment,and also can be supplied in the annealed condition which require hardening and tempering but give increased machinability.it is often supplied in the hardened and tempered condition with hardness 28-34HRC.
1.DIN 1.6582/34CrNiMo6 steel Supply Form & Size
| Form of Supply | Size(mm) | Length(mm) |
| Round bar | Φ6-Φ1,000 | 3,000-10,000 |
| Square bar | 100x100-600x600 | 3,000-6,000 |
| Plate/Sheet | Thickness :20-400 Width:80-1,000 | 2,000-6,000 |
| Flat bar/Blcoks | Thickness :120-800 Width:120-1,500 | 2,000-6,000 |
2.Surface Finish&Tolerance
| Surface Finish | Black-Forged | Black-Rolled | Turned | Grinding | Polished | Peeled | Cold Drawn |
| Tolerance | (0，+5mm) | (0，+1mm) | (0，+3mm) | Best h9 | Best h11 | Best H11 | Best H11 |
3.Chemical Composition&Related Specifications
| Grade | C | Mn | P | S | Si | Ni | Cr | Mo |
| 34CrNiMo6/1.6582 | 0.30-0.38 | 0.50-0.80 | ≤ 0.025 | ≤ 0.035 | ≤ 0.04 | 1.3-1.7 | 1.3-1.7 | 0.15-0.3 |
| USA | UK | Japan | France |
| 4340/4337 | 817M40/816M40 | SNCM449 | 35NCD6 |
4.Mechanical Property
| Diameter,mm | <250 | 250-500 | 500-990 |
| Thickness,mm | <160 | 160-330 | 330-660 |
| Tensile Strength,Mpa | >800 | >750 | >700 |
| Yield Strength,Mpa | >600 | >540 | >490 |
| Elongation,% | >13 | >14 | >15 |
| Charpy Impact, J | >45 | >45 | >40 |
| Brinell Hardness,HB | >240 | >225 | >213 |
5.DIN 1.6582/34CrNiMo6 steel Forging
Hot forging temperature: 900-1100℃,cool slowly in sand after forged.
6. Heat Treatment
- Normalizing:860℃-870℃,Cool in air
- Soft Annealing:650℃-680℃,Cool in furnace,max. 248 HB
- Full Annealing:830-900℃,Cool in furnace
- Hardening:830 – 860°C,oil quench is recommended
- Tempering:540°C – 660°C, cool in still air
7.Cold Working
34CrNiMo6 has good ductility,may be cold worked, in the annealed condition,by conventional methods and tooling
8.Application
34CrNiMo6 steel is used to make tools which demands good plasticity and high strength.
Typical applications: Shafts, connection rod bolts, push rods, studs, pinion sleeves, mandrel ars for tube manufacturing, breech mechanism parts, high-duty engine connecting rods, high temperature bolts in oil refining and steam installations, various parts of machine tools such as spindle gears, power transmission gears, slide cams.
