Quick Detail
Place of Origin
HS-CODE
11-
Package & Delivery Lead Time
Detailed Description
Applications
1045 Cold Drawn Carbon Steel Round Bar is used where greater strength is required than can be obtained from the lower carbon steels. It responds to heat treatment, and a wide range of properties can be obtained. Applications include shafts, machinery parts, bolts, pinions, gears, etc.
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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. As 1443 BS970 ASTM A29 JIS G4051
1.0503 1045 080A47/EN43B 1045 S45C
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Chemical Composition(%)
C(1040) C(1045) Mn Si P S
0.37-0.44 0.43-0.50 0.60-0.90 0.40 max 0.040 max 0.050 max
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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)
16 max 690 min 540 min 8 min 207 max
16-38 650 min 510 min 8 min 195 max
38-80 640 min 500 min 9 min 190 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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Machinability
Machinability rating is approximately 64% based on 1212 as 100%. Average surface cutting speed is between 95 and 105 feet per minute.
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Weldability
Due to higher carbon content, this material is not readily welded.With thin sections and flexible design, gas or arc welding may be used without preheating, but in joints over 1/2” to 3/4” thick preheating is necessary. To develop equivalent strength in a weld, a low alloy filler is recommended. Stress relieving
after welding is also recommended. The grade of welding rod to be used depends thickness of section, design, service requirement, etc.
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Heat Treating
This steel is essentially water-hardening, but it may be quenched in oil. The recommended quenching temperatures are 1550ºF for water and 1575ºF for oil. A wide range of mechanical properties can be obtained by tempering at different temperatures between 700ºF and 1300ºF. Tempering in the range from 500ºF to 700ºF should be avoided.
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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
SKYPE:ustcindy
Email:cindyliu@shunitesteel.com
www.shunitesteel.com
www.shunitesteel.com.cn
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