8620 Cold Drawn Alloy Steel Round Bar-Cold Finished

• Post Date:

  Jun 07,2013

• Expiry Date:

  Dec 04,2013

• Detailed Description:

  Quantity: 5Metric Tons
  Price:800 USD Metric Tons
  Applications
  When hardened and formed, 8620 Cold Drawn Alloy Steel Round Bar may be used to produce hard wearing machine parts in a wide variety of industries. With its combination of elements along with the ease with which it may be processed, 8620 steel bar is a good choice for a variety of applications. Carburized 8620 alloy is strong and durable and as a result is preferred in certain manufacturing applications. It is used to make a wide range of gears, crankshafts, gear rings, pinions, piston pins, cams, gauges, tie bars, collets, bushings and bolting as well as hand tools and a multitude of machinery parts and components. Structural parts such as gears, pinions, spline shafts, pins and a variety of other important applications requiring a hard wear surface and a ductile core.
  
  
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  Quality Standard
  ASTM A108 Standard Specification for Steel Bar, Carbon and Alloy, Cold-Finished
  EN 10277 Bright steel products.
  EN 10278 Dimensions and tolerances of bright steel products
  GB/T 905 Dimension, shape, weight and tolerance for cold-drawn round, square and hexagonal steels
  GB/T 3078 Technical Requirements for Quality Structural Steels Cold Drawn Bar
  
  
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  All Grades Comparison
  
  Material no. ASTM A29 JIS G4103 AS 1444 EN10084
  1.6523 8620
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  Chemical Composition(%)
  C Mn Si P S Cr Ni Mo
  0.18-0.23 0.70-0.90 0.15-0.35 0.030 max 0.040 max 0.40-0.60 0.40-0.70 0.15-0.25
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  Mechanical Properties( T=20°C if not differently stated )
  Dia(mm) Tensile Strength Rm (Mpa) Yield Strength R2 (Mpa) Fracture elongation A5 (%) Hardness (HB)
  18-40 925 min 690 min 17 min 275 max
  40-80 740 min 493 min 20 min 220 max
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  Diameter Tolerance
  Diameter Tolerance H9 Tolerance H10 Tolerance H11 Tolerance H12
  (mm) (mm) (mm) (mm) (mm)
  3 (+0,-0.025) (+0,-0.040) (+0,-0.060) (+0,-0.150)
  3-6 (+0,-0.030) (+0,-0.048) (+0,-0.075) (+0,-0.120)
  6-10 (+0,-0.036) (+0,-0.058) (+0,-0.090) (+0,-0.150)
  10-18 (+0,-0.043) (+0,-0.070) (+0,-0.110) (+0,-0.180)
  18-30 (+0,-0.052) (+0,-0.084) (+0,-0.130) (+0,-0.210)
  30-50 (+0,-0.062) (+0,-0.100) (+0,-0.160) (+0,-0.250)
  50-80 (+0,-0.074) (+0,-0.120) (+0,-0.190) (+0,-0.300)
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  Straightness Tolerance
  Diameter(mm) Straightness(mm/mtr)(max) Total Straightness(mm)(max)
  7-25 3 Total length*Max Straightness
  25-50 2 Total length*Max Straightness
  50-80 1 Total length*Max Straightness
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  Length Tolerance
  Cut to Lengthup to 9000Corresponding to specifications
  
  Type of Length Length(mm) Length Tolerance(mm)
  Manufacturing Length 3000-9000 +/-500
  Stock Length 3000 or 6000 (-0,+200)
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  Process
  Step1: Our process begins with either hot-rolled steel coils or hot-rolled straight bars from the mill. When hot-rolled bars are used, they are drawn individually. When coils are used, overhead cranes use C-hooks to safely lift the coil onto the “Payoff-Decoiler.”
  Step2: Steel unwraps from the “Payoff De-Coiler” and is fed through the horizontal and vertical pre-straightener rollers to “break the memory” of the coil.
  Step3: Steel continues on through the shot blaster so that the surface of the bar can be cleaned of all scale and rust.
  Step4: Now the steel is push-pointed through a die. The drawing unit will then pull the steel through that same die, in a continuous motion.
  Step5: Continuous straightening is maintained by passing the steel through more rollers.
  Step6: Non-destructive testing is in place on all drive lines to ensure that surface defects from the raw materials are being detected and sorted out.
  Step7: More straightening processes are in place throughout the draw line.
  Step8: Shear barrels or shear knives will shear or cut the bar to the customer’s desired length.
  Step9: The final straightening process occurs at the 2-roll straightener when the bar passes through the large concave and convex rolls. Guide blades, angles and pressure all contribute to the final straightness of the bar.
  
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  Weldability
  Readily welded in the as rolled condition with the correct procedure, but welding in the case hardened or
  through hardened condition is not recommended.
  
  
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  Packaging
  
  Lengths of 48″ and under are bundled and strapped to skids, or put in corrugated shipping containers. Longer lengths are shipped in 1,000lb bundles, 5 bands per bundle.
  
  
  
  
  Shanghai Unite Steel CO.,LTD
  
  Cindy Liu
  Tel: +86--021--35316960-811
  Fax: +86--021--35316961
  Email:cindyliu@shunitesteel.com
  www.shunitesteel.com
  www.shunitesteel.com.cn

• Company:

  Shanghai Unite Steel Trading Co., Ltd.     [ China ]        

• Contact:

  Cindy Liu

• Tel:

  86-21-35316960-811

• Fax:

  86-21-35316961

• Email:

  cindyliu@shunitesteel.com