Tempering Alloy Tool Engineering Steel Round Bar 1.6511 / SAE4340
Equivalent grades:
| GB(China) | DIN(German) | AISI(USA) | JIS(Japan) |
| 40CrNiMo | 1.6511 | SAE4340 | SNCM439 |
Chemical composition(%):
| C | Si | Mn | S | P | Cr | Mo | Ni |
| 0.38~0.43 | 0.15~0.35 | 0.60~0.80 | ≤0.040 | ≤0.035 | 0.70~0.90 | 0.20~0.30 | 1.65~2.00 |
Heat treatment:
Quenching 850 degrees; cooling way: oil cooling;
tempering temperature of 600 degrees; cooling way: oil cooling;
Steel annealing or high temperature tempering supply state Brinell
hardness GBW ≤269.
Available size(mm):
| Flat Bar Size(mm) | Round bar Size(mm) |
| Thickness | Width | Length | Diameter | Length |
| 10-700 | 155-2200 | 3000-6000 | 10-300 | 3000-6000 |
Feature:
It has high strength, toughness and excellent quenching and
anti-overheating stability, but the white point is highly sensitive
and has a temper brittleness.The welding property is poor, before
welding, it needs to be preheated by high temperature. After
welding, the stress should be eliminated and applied after
adjustment.
Applications:
Important parts for high production strength, good plasticity, and
special functional requirements after nitride disposal, such as
shaft, gear, fasteners, etc.
Used as require good toughness, high strength, as well as the
important conditioning of large size, heavy machinery such as high
load of axial, turbine shaft, larger than 250 mm in diameter of
helicopter rotor shaft, turbojet engine turbine shaft, blade, high
load of transmission parts, fasteners of the crankshaft.Gear, etc.
It can also be used for operating temperature over 400 ℃ of rotor
shaft and blade, etc.
It can also be used to make important parts for special performance
after nitride treatment, and can be used in high strength steel
after low temperature tempering or after isothermal quenching.
Delivery status:
Delivery in heat treatment (positive fire, annealing or high
temperature tempering) or not heat treatment.
Delivery time:
For abundant stock, 15-20 days.For customized products, 30-50 days.
About us:
Guangzhou ChangFeng Steel co., Ltd has a lot of experienced and
competent elites and is capable of offering the best service after
years of development.
Our company equips with large-sized Vertical saw machines,
Horizontal saw machines, Milling machines, Grinding machines and
other advanced equipments to provide customers with cutting and
other processing services.
Our all products should be inspected the metallographic analysis,
hardness, ultrasonic flaw detection and other strict inspection
processes, which meet the standards of DIN, AISI, JIS and GB to
ensure their function and quality.
Our company keeps the principle of "sincerely cooperation, endless
striving for perfection".We desire to establish the long-term
mutual beneficial and win-win relation with importers all over the
word.
Product photos:
