Heat Treating Forged Steel Flat Bar 4140 Quenching Manufacturer - China

Steel Flat bar 4140 | Steel Flat bar 4140 manufacturer | forged Steel Flat bar 4140 Quenching Steel Steel Grade:

AISI 4140/DIN 1.7225/JIS SCM440/GB 42CrMo

Size & Dimension: Dia: 20-120mm L: 2000-5800mm

Technique: Cold/Hot rolled, Cold-Drawn or Hot Forged

Heat Treatment Annealed; Quenched; Tempered

Delivery Condition: Hot Rolled or Forged/Peeled or Black Surface/Annealed or QT

Test: SGS/UT100%/Elements Testing

Certificate: ISO/Mill Certificate

AVAILABLE Steel Type: Round bar/Plate AVAILABLE 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.

AISI 4140/DIN 1.7225 Introduction:

AISI 4140 alloy steel is chromium, molybdenum, manganese containing low alloy steel.

It has high fatigue strength, abrasion and impact resistance, toughness, and torsional strength.

Fabrication and Heat Treatment:

1 - Forging

Preheat the steel carefully, then raise the temperature to 1150-1200°C for forging.

Do not forge below 850°C.

2 - Annealing

Heat the AISI 4140 slowly to 800-850°C and allow enough time for the steel to be thoroughly heated.

Cool slowly in the furnace to 480°C followed by air cooling.

3 - Stress Relieving

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

4 - Hardening

AISI 4140 steel is usually supplied ready heat treated to 18-22HRC.

If further heat treatment is required annealed AISI 4140 should be heated slowly to 840-875°C and after adequate soaking at this temperature quench in oil.

Temper as soon as the tools reach room temperature.

5 - Tempering

Heat the AISI 4140 carefully to a suitable temperature selected by reference to a tempering chart or table (usually between 550-700°C, soak at the temperature for 2 hours per 25mm of ruling section, then allow to cool in air.

Tempering between 250-375°C is not advised as tempering within this range will seriously reduce the impact value.

6 - Surface Treatment

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

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

We specialize in 4140 and 4340 steels, which are versatile and have many advantages for a variety of industrial applications.

Knowing the differences between them will help you choose the one that best suits your needs.

​Our advantages: Focus on the steel industry for more than ten years, strong factories, professional services, ensure quality, customize according to customer requirements, factory prices, fast transportation, Good after-sales service, pleasant cooperation, high repurchase rate and so on.

We offer a wide range of information and high quality steel products on 4140 and 4340 steel, for more information on our 4140 and 4340 steel products, please contact us today.

To discuss pricing details, please request a quote.

CONTACT US:

MiKi Zhuo

ADD: No.

4 Dongda Street, Shatou, Changan Town, Dongguan City, Guangdong Province, P.R.C China

For more 4140 steel product information, please click this link:

steelpurchase.

com

songshunsteel41404340

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Company Contact:

• Posted By: Dongguan Songshun Mould Steel Co., Ltd.

• Phone: 0086 0769 85475596

• Address: 1st Floor, No. 1, Dongda Fourth Street, Shatou Community, Chang'an Town, Dongguan , GuangDong , China

• Email:

• Website: https://songshunsteel.com

• Business Description: Established in 2009,Songshun Steel supplies a wide range of carbon, alloy and tool steel products, including high speed tool steel, cold work tool steel, hot work tool steel, plastic mould steel, engineering steel and machine structural steel etc.
  
  After more than 10 years development and growing, Songshun Steel becomes one comprehensive special steel factory, stockist and exporter.
  
  Combined with experienced exporting team and professional technical knowledge, Songshun Steel offers both technical advice and support, as well as global professional steel solution and service.
  
  Due to satisfactory reliable quality and professional service, Songshun expands our market worldwide, such as Colombia, Chile, Spain, Turkey, Iran, Vietnam, Malaysia ,UAE, Canada, Brazil, Mexico and so on.
  
  Songshun specialized in Special Steel for almost 20 years.
  
  We can supply mold steel, high speed steel, alloy steel, free cutting steel and etc.
  
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