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Forged AISI 4340 Steel |Low Carbon

Forged AISI 4340 Steel Warehouse

1.Product Details

2.CHEMICAL COMPOSITION

3.PRODUCT DESCRIPTION

Surface Treatment:

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

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

Size:

Round bar:Diameter(mm) Max 800mm;Length(mm) Max 12000mm.

Plate: Thickness(mm) Max 800mm; Width(mm) Max 2300mm; Length(mm) Max 12000mm.

Condition: Cold rolled(drawn)≤50mm, Hot rolled≤12-250mm, Hot forged≥50mm.(Thickness/Diameter)

Heat Treatment:

1.Forging:

Preheat the steel carefully, then raise the temperature to 1150-1210°C for forging. Do not forge below 850°C. 4340 has good forging characteristics but care must be taken when cooling as the steel shows susceptibility to cracking. Cooling in ash or lime after forging is recommended

2. Annealing:

Heat the steel slowly to 800-860°C and allow enough time for the steel to be thoroughly heated. Cool slowly in the furnace.

3. Stress Relieving:

When components are heavily machined, ground or otherwise subject to cold work, stress relieving will be beneficial prior to hardening.

4. Hardening:

4340 steel is usually supplied ready heat treated. If further heat treatment is required annealed 4340 should be heated slowly to 830-865°C and after adequate soaking at this temperature quench in oil. Temper as soon as the steel reaches room temperature.

5. Tempering:

Heat the steel carefully to a suitable temperature selected by reference to a tempering chart or table, soak at the temperature for 2 hours per 25mm of section, then allow to cool in air.

Charateristics:

4340 steel offers toughness and high strength in the heat treated condition, with good fatigue strength. Available in round bar 4340 is available fully certified and suitable for applications requiring a quality high tensile alloy steel. AISI 4340 is commonly supplied quenched and tempered with a hardness of between 24 to 29HRc

Applications:

This grade of steel is suited for shock loading or stress concentration applications such as shafts, gears, bolts, nuts, pins and couplings.

4.Company Introduction

Dongguan Mould Steel Co.,LTDis 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.

5.Product packaging

Under normal circustances,the delivery time is 10-15 days if we have stocks in our warehouse. Otherwise,we need 45 to 60 days because they are customized and high requirement of quality.

6.Contact us

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

Songshun Always Open the Door for You.

MiKi Zhuo

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

For more steel product information,Please search our company(Dongguan Songshun Mould Steel Co., Ltd.)
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