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Tempering Alloy Tool Steel Engineering Steel Round Bar 1.6511 / SAE4340

China Guangzhou Changfeng Steel Co., LTD certification
China Guangzhou Changfeng Steel Co., LTD certification
Gold supplier! Arranged shipment very fast, quality is super good. They are one of our best suppliers, will do more business with them in the future!

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We bought 7 containers from them in 2017, no quality problems. The boss is very nice and professional, good business parner!

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Tempering Alloy Tool Steel Engineering Steel Round Bar 1.6511 / SAE4340

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Large Image :  Tempering Alloy Tool Steel Engineering Steel Round Bar 1.6511 / SAE4340

Product Details:
Place of Origin: China
Brand Name: CF Steel
Certification: ISO / Mill Certificate
Model Number: 1.6511 / SAE4340 / 40CrNiMo
Payment & Shipping Terms:
Minimum Order Quantity: Negotiable
Price: Negotiable
Packaging Details: Standard export packing or according to cunstomers' requirement.
Delivery Time: 10-15 work days
Payment Terms: L/C, T/T
Supply Ability: 1000 Mt/Month
Detailed Product Description
Heat Treatment: Annealed / Q+T Surface Treatment: Black / Polishing / Turning / Milling
Shape: Round Bar / Steel Plate / Flat Bar Melting Process: EAF+LF+VD+ESR
Payment Term: 30% Deposit, Balance By L/C At Sigth After Shipment Delivery Condition: Forged Or Hot Rolled
High Light:

engineering special steels


h13 tool steel


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


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





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.





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.


Tempering Alloy Tool Steel Engineering Steel Round Bar 1.6511 / SAE4340 0



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:


Tempering Alloy Tool Steel Engineering Steel Round Bar 1.6511 / SAE4340 1

Tempering Alloy Tool Steel Engineering Steel Round Bar 1.6511 / SAE4340 2


Contact Details
Guangzhou Changfeng Steel Co., LTD

Contact Person: Echo

Tel: +86 18148729336

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