China Factory 65mn Steel Round Bars Price - China

Annealing specification

In the traditional periodic spheroidizing annealing process, the annealing temperature is 750°C, heat preservation for 2 hours, furnace cooling to (680±10)°C, heat preservation for 3 hours, and then furnace cooling to 550°C, then air cooling out of the furnace.

The production efficiency is low, the oxidation decarburization rate reaches 22%-40%, and the surface hardness and elasticity cannot meet the requirements.

New process of incomplete annealing, annealing temperature (740±10) ℃, heat preservation for 4 hours, after the furnace is cooled to 550 ℃, the furnace is air-cooled.

The tensile strength is 600-620Mpa, the elongation is 53.5%-40%, and the hardness is 209-214HBW.

The metallographic structure is spheroidized pearlite + a small amount of point-like pearlite, which shortens the production cycle and saves energy.

Heat treatment and specifications

Quenching at 830°C±20°C, oil cooling; tempering at 540°C±50°C (±30°C for special needs).

Critical point temperature (approximate value) Ac1=726°C, Ac3=765°C, Ar3=741°C, Ar1=689°C, Ms=270°C.

Normalizing specification: temperature 810±10℃, air cooling.

Quenching and tempering specifications: quenching temperature 830±10°C, oil cooling; tempering temperature 540°C±10°C, water, oil cooling.

delivery status

Hot-rolled steel is delivered in heat-treated or non-heat-treated state, and cold-drawn steel is delivered in heat-treated state.

(2.0-16)*1250*C Laigang / hot coil / hot plate

50Mn (2.0-16)*1250*C Laigang / hot coil / hot plate

65Mn (2.0-16)*1010/1250*C Laigang / hot coil / hot plate Features and scope of application:

After heat treatment and cold drawing hardening, it has high strength, certain toughness and plasticity; under the same surface state and complete hardening, the fatigue limit is equivalent to that of alloy springs.

However, the hardenability is poor, and it is mainly used for springs of smaller sizes, such as pressure-adjusting and speed-regulating springs, force-measuring springs, round and square coil springs on general machinery, or drawn steel wires as springs on small machinery.

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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Company Contact:

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

• Phone: 076985475596

• 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.
  
  Welcome your contact 24 hours a day!!!
  
  Skype/Whatsapp/We chat: +86-18269260283
  
  Songshun Tiktok: mikizhuo
  
  Songshun Facebook: Songshun Steel
  
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