Din 1 7225 Jis Scm440 Aisi Astm 4140 Round Bar Steel Product - China

Din 1.7225 jis scm440 aisi astm 4140 round bar steel product what is aisi 4140 steel? aisi 4140 alloy steel round bar sheet plate belongs to medium hardenability steel.

aisi 4140 steel has high fatigue strength and low notch sensitivity.

low-temperature impact toughness is also very high, no obvious temper brittleness.

aisi 4140 steel round bar is mainly used after quenching and tempering state.

it is used to manufacture high-strength parts under impact loads and the fittings with large cross-sections and other stressed members.

such as the horizontal eccentric shaft of the horizontal forging machine, the crankshaft of the forging press, and etc.

its equivalent grade is jis scm440 and din 1.7225 - the properties and composition of 4140 steel round bar sheet plate as below.

china gb steel number 42crmo, germany din steel number 42crmo4, germany din material number 1.7225, french nf standard 40cd4/42cd4, japanese jis standard scm440, british bs standard 708m40/708a42/709m40, american aisi/astm 4140, american sae 4140, american uns standard g41400 chemical composition:

c: 0.38-0.45 si: 0.17-0.37 s: ≤0.035 p: ≤0.035

mn: 0.50-0.80 cr: 0.90-1.20 mo: 0.15-0.25 ni: ≤0.30

cu≤0.30 4140 steel round bar sheet plate heat treatment

machinability

at the annealed condition, 1.7225 alloy tool steel has good machinability.

forming

din 1.7225 steel has high ductility.

it can be formed using conventional techniques in the annealed condition.

it is required more pressure or force for forming because it is tougher than plain carbon steels.

welding

1.7225 alloy steel can be welded using all advanced techniques.

but, the mechanical properties of it will be affected if it is welded in the heat treated condition, and post weld heat treatment should be performed.

heat treatment

1.7225 tool steel is heated at 845°c(1550°f) followed by quenching in oil.

before hardening, it can be normalized by heating at 913°c (1675°f) for a long period of time followed by air cooling.

forging

it is forged at 926 to 1205°c(1700 to 2200°f) hot working

4140 steel can be hot worked at 816 to 1038°c(1500 to 1900°f) cold working

1.7225 steel can be cold worked using conventional methods in the annealed condition.

annealing

heat it to 800℃ – 850℃, hold until temperature is uniform throughout the section and cool in furnace.

normalizing

heat 1.7225 alloy steel to 870℃ – 900℃, hold it until the temperature is uniform throughout the section, soak for 10 – 15 minutes and cool in still air.

tempering

din 1.7225 steel can be tempered at 205 to 649°c (400 to 1200°f) depending upon the desired hardness level.

the hardness of the steel can be increased if it has lower tempering temperature.

for example, tensile strength of 225 ksi cab be achieved by tempering at 316°c (600°f), and tensile strength of 130 ksi can be achieved by tempering at 538°c (1000°f).

hardening

din 1.7225 alloy steel can be hardened by cold working, or heating and quenching.

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!!!

+86-18269260283

songshun tiktok: mikizhuo

songshun facebook: songshun steel

songshun youtube: miki zhuo

songshunsteel41404340

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
  
  Songshun YouTube: MiKi Zhuo
  
  songshunmoldsteel414 04340