Product Description
4340/40CrNiMoA/1.6511/EN24 Forged Steel Round Bar/Hot Rolled Steel Bar/Alloy Structural Steel / Machined Steel
Dimensions
Hot Rolled Round: dia.16-300 mm
Forged Round: dia.150-1200 mm
Cold Drawn Round: dia.6-30 mm
Hot Rolled Plate: 10-150 x 2000-2300 mm
Forged Block: 150-1000 x 200-1900 mm
Delivery Condition
EAF+LF+VD, Hot Rolled or Forged or Cold Drawn, Annealed or Q+T, Black or Machined surface, UT SEP1921 Class3 C/c or D/d
Equivalence
| AISI / SAE | DIN / W.Nr | JIS | GB | |
| 4340 | 34CrNiMo6 1.6582 | SNCM439 | 40CrNiMoA | |
Chemical Composition(%)
| Steel Grade | C | Si | Mn | P | S | Cr | Mo | Ni |
| 34CrNiMo6 | 0.30-0.38 | ≤ 0.40 | 0.50-0.80 | ≤ 0.035 | ≤ 0.035 | 1.30-1.70 | 0.15-0.30 | 1.30-1.70 |
| 1.6582 | ||||||||
| 4340 | 0.38-0.43 | 0.15-0.35 | 0.60-0.80 | ≤ 0.035 | ≤ 0.040 | 0.70-0.90 | 0.20-0.30 | 1.65-2.00 |
| SNCM439 | 0.36-0.43 | 0.15-0.35 | 0.60-0.90 | ≤ 0.030 | ≤ 0.030 | 0.60-1.00 | 0.15-0.30 | 1.60-2.00 |
| 40CrNiMoA | 0.37-0.44 | 0.17-0.37 | 0.50-0.80 | ≤ 0.030 | ≤ 0.030 | 0.60-0.90 | 0.15-0.25 | 1.25-1.65 |
Characteristics
AISI 4340 Alloy Steel is a heat treatable and low alloy steel containing chromium, nickel and molybdenum. It has high toughness and strength in the heat treated condition. It is mainly used in power transmission gears and shafts, aircraft landing gear, and other structural parts.
Applications
It is generally used for making important parts with high strength and good plasticity, and for making important parts with special performance requirements after nitrogen treatment, such as shafts, gears and fasteners
Delivery Time: 7-10 working days for steel in stock. 20-60 working days for direct production based on the quantity.
Our Independent Laboratory
In order to guarantee a uniform good quality, ShengHe perform necessary testing and inspection according to international standards and specifications.
ShengHe has its own lab with full equipments and a team of professional Q&A and Q&C engineers to do all the tests and analysis of the materials: chemical analysis, mechanical test, UT test, microstructure analysis, hardness checking, etc. The lab also provide third party inspection service.
Ultrasonic testing
Spectrographical analysis
Hardness testing
Microstructure analysis
Tensile testing
Impact testing