4340 Steel Round Bar AISI 4340 Structural Alloy Steel

4340 Steel Round Bar AISI 4340 Structural Alloy Steel

1.Product Details

 · GB steel number:   CN:40CrNiMoA   DIN:36CrNiMo4  JIS:SNCM439  BS:816M40  US:AISI/ASTM4340

· keyword:4340,4340 steel,4340 round bar

· Usage: It is used as important quenched and tempered parts that require good toughness,high strength and large size, 

such as heavy machinery and high-load shafts,turbine shafts with a diameter greater than 250mm, helicopter rotor shafts, 

turbojet engine turbine shafts,blades, high Loaded transmission parts, crankshaft fasteners. gears, etc.;

· Other Steel Types:5140 /4140 / 4340 / 4142 / 15CrMo / 6150 / 38CrMoAI / 8620 .....

· Serve:OEM/ODM

· Delivery status:With heat treatment (normalized, annealed or high temperature tempered) or without heat treatment Goods, the delivery status should be specified in the contract

1.1  Chemical composition

1.2  Equivalent Steel Grade

1.3  Q+T Properties

1.4  Surface Treatment

Plate: Origin Black, Orign cold rolled bright, Machined, Grinded

Bar:  Origin Black, Orign cold rolled(drawn) bright, Turned, Peeled, Grinded

1.5  Charateristics

4340 steel offers toughness and high strength inthe heat treated condition,

with in round bar 4340 is available fully certified and suitable for applications 

requiring a quality tensile alloy steel.AISI 4340 is commonly supplied quenched 

and tempered with a hardness of between 24 to 29HRc

1.6  Applications

This grade of steel is suited for shock loading or stress concentration applications such 

asshafts, gears,bolts,nuts,pins and couplings.                                

1.7  Product Photo

2.Company Introduction

    Dongguan Songshun Mould Steel Co., Ltd. is an Indusrtial and trading company with 2 warehouses that manufactures good & high quality kinds of steels starting from 2012. 

The company provides the customized products and OEM service. What´s more, we keep the mass stock of over 20000 tons. In those years, we offer a wide range of steels to our 

customers from all over the world. And we enjoy high praise among them.

3.Customer Photos

     We warmly welcome new and old customers to establish good and long term relationship with us based on equality and mutual assistance.

4.Certifications

5.Product packaging

6.FAQ

Q:Are you a factory or a trading company?

A: The fact is that we are a company. We have own factory and several warehouses. Under the trend of globalization of the world, we established a professional foreign trade department to change the world.

Q: What is your delivery date?

A: The delivery date is about 10-30 days after receipt of payment.

Q: Can I get some samples?

A: We are honored to offer you samples.

Q: What port do you usually ship from?

A: We have 3 common ports,Tianjin, Shanghai and Shen.

Q: What is the payment terms?

A: T/T is our priority, L/C is also OK for us.

7.Contact us

Feel free to contact us,we are glad to serve for you.

Songshun Always Open the Door for You.

MiKi Zhuo

Skype/Whatsapp/Wechat:86-13723516041

ADD:No.4 Dongda Street, Shatou, Changan Town, Dongguan City, Guangdong Province, P.R.C China