Black Round Steel Bar 4340 Chinese Export Import Plastic Mould Tool Steel Traders

black round steel bar  4340  Chinese export import plastic mould tool steel traders

1. Specification:

2.Chemical analysis 

Round bar AISI 4340

2.1. Standards:  AISI 4340 8620 8640 4320 , JIS SNCM8  GB:40CrNiMoA 

2.2. Specification: Dia: 80~450mm  Length:2000-13000mm or as required

2.3. Process:  EAF+LF+VD ( necessary)    UT+ Peeled +Turned + Heat Treatment (optional)

2.4. Machine Capability

Tensile strength (N/mm2Mpa): >=980(100)
Elongation: >=12
Yield strength: >=835(85)
Hardness:( HBS 100/3000)<=269
Reduction of area:>=55

Akv(J)>=78  akv(J/cm2):>=98(10)

2.5. Chemical Composition (%):

2.6. Inspection: 100% Ultrasonic according to the test standards:SEP1921-84,GR.3 CLASS C/C 

About us:

  ◊Establish: Dongguan Circle Four Metal Materials Co., Ltd. was established in 2008 has 5 years manufacturing and exporting professional experience in mould steel, special steel etc.

  ◊Products: We mainly manufacture more than 100 kinds of hot rolling or forging products, such as alloy structural steel, alloy tool steel, carbon structural steel, carbon tool steel, plastic mould steel, hot work steel, cold work steel, spring steel and high speed steel.

  ◊Capacity: 500, 000MT per year.

Any interests in our company and products, please feel free to contact us for quotation. We warmly welcome you to our factory.

Our company located in No.38XinGang Road,Xinan,Xinan,Xingnongcun,Changan Town,Dongguan City,China .                                                                                                                                                Tel: 86-0769-85310228   fax 86-0769-85348866 .

Our advantage products: