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4140 Cold Drawn Alloy Steel Round Bar-Cold Finished
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| Post Date: | Jun 07,2013 |
| Expiry Date: | Jun 07,2014 |
| Detailed Description: |
Cas No. :Unite Steel
Quantity: 5Metric Tons Price:800 USD Metric Tons Payment Method: T/T or L/C Applications 4140 Cold Drawn Alloy Steel Round Bar is the most commonly used of the high tensile steels with a wide range of applications in automotive, Gear and Engine construction, Crankshafts, Steering, knuckles, Connecting rods, Spindles, Intermediate gears, Pump and Gear shafts, Axles, Nuts and Bolts, Machined components, pump shafts, valves, fasteners, machine tools, dairy equipments, surgical & medical parts, threaded bars, studs, bolts, pins, hinges and handles. 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. BS970 ASTM A29 JIS G4105 AS 1444 EN10083 1.7225 En19A/708M40 4140 Back to Top Chemical Composition(%) C Mn Si P S Cr Mo 0.38-0.43 0.75-1.00 0.15-0.35 0.030 max 0.040 max 0.80-1.10 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 1000-1200 750 min 11 min 295-360 40-80 900-1100 650 min 12 min 265-330 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 Parts should be welded in the hardened and tempered condition. Strength properties of the joint will not be the same as the base metal. Preheat 300-400oC. Temper after welding to about 35-50oC below the recommended tempering temperature.Filler metal: – FOX CM2-KB electrodes or CM2-IGwire. For advice in connection with difficult welding, please consult our engineers. 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 |
| CAS Registry Number: | Unite Steel |
| 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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