34CrNiMo6+QT|DIN 1.6582 Quality Alloy Steel
34CrNiMo6/DIN 1.6582 Alloy Steel manufacturers and suppliers,supplied with round rods,square/flat bars,rollers,shafts,blocks and forging pieces.
34CrNiMo6/1.6582 Alloy Steel is defined as Engineering steel which contains low Cr-Ni-Mo as strength elements as per EN10083 Standard.This material has high strength,toughness and good hardenability after quenched and tempered,but also has poor weldability,high sensitivity on hydrogen flaking and temper brittleness.34CrNiMo6/1.6582 Alloy Steel is widely used in heavy duty Shafts, Gears, Axles, Spindles, Couplings, Pins etc.
1.Chemical Composition
| 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 |
2.Related Specifications
ASTM:4340
BS:817M40/EN24
JIS:SNCM449
GB:40CrNiMo
3.Heat Treatment
- Normalizing:860℃-880℃,Cool in air
- Soft Annealing:650℃-680℃,Cool in furnace,max. 248 HB
- Full Annealing:800-850℃,Cool in furnace
- Hardening:830 – 860°C,oil quench is recommended
- Tempering:540°C – 660°C, cool in still air
34CrNiMo6 Normalizing Diagram
34CrNiMo6 Annealing Diagram
4.Mechanical Property with Quenched and Tempered condition as per EN10083
| Size,mm | Tensile,Mpa | Yield,Mpa | Elongation,% | Reduction,% | Charpy Impact,J |
| ≤16 | 1200-1400 | ≥1000 | ≥9 | ≥40 | - |
| 16-40 | 1100-1300 | ≥900 | ≥10 | ≥45 | ≥45 |
| 40-100 | 1000-1200 | ≥800 | ≥11 | ≥50 | ≥45 |
| 100-160 | 900-1100 | ≥700 | ≥12 | ≥55 | ≥45 |
| 160-250 | 800-950 | ≥600 | ≥13 | ≥55 | ≥45 |
5.Mechanical Property with Quenched and Tempered condition as per EN10250
| Thickness,mm | Tensile,Mpa | Yield,Mpa | Elongation,% | Charpy Impact,J |
| ≤160 | ≥800 | ≥600 | L:≥13 T:≥9 | L:≥45 T:≥22 |
| 160-330 | ≥750 | ≥540 | L:≥14 T:≥10 | L:≥45 T:≥22 |
| 330-660 | ≥700 | ≥490 | L:≥15 T:≥11 | L:≥40 T:≥20 |
6.Mechanical Property of Testing Data for Quenched and Tempered condition
| Size mm | Tensile,Mpa | Yield,Mpa | Elongation,% | Reduction,% | Charpy Impact,J | Hardness,HB |
| Φ200 | 925 | 740 | 18 | 61.5 | 104/108/118 | 302-323 |
| Φ280 | 925 | 740 | 18 | 63.5 | 106/103/101 | 286-309 |
| Φ350 | 905 | 725 | 20 | 64.5 | 112/110/111 | 288-312 |
| Φ430 | 825 | 650 | 17.4 | 54.5 | 89/105/113 | 270-275 |
| Φ575 | 785 | 590 | 20 | 50 | 97/91/76 | 270-272 |
7.Supply Size & Condition
- Round Bars: Dia.80 – 1,000mm as Forged
- Flat / Square Bars: Thickness Max.800mm
- Shafts, Rollers, Blocks: Customized or According to Drawing
- Rolled Round Bars: Dia.16 – 250mm with UT Assurance
Heat treatment:Quenched and Tempered (+QT), Normalizing (+N), Annealing (+A)
Surface finish:Black / Rough turned / Peeled
