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8620 Cold Drawn Alloy Steel Round Bar-Cold Finished
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| 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. Back to Top 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 Back to Top All Grades Comparison Material no. ASTM A29 JIS G4103 AS 1444 EN10084 1.6523 8620 Back to Top 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 Back to Top 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 Back to Top 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) Back to Top 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 Back to Top 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) Back to Top 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. Back to Top 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. Back to Top 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 |
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