Heavy Wall Thickness Seamless Cold Drawn Steel Tube Mechanical Purpose
Cold Drawn Heavy Wall Thickness Seamless Steel Tube
High concentricity, High straightness, Uniform wall thickness
| Product Name | Seamless Mechanical Tubing ASTM A519 |
| Material | 1010, 1020, 1026, 1045, 4130, 4140 |
| Delivery Condition | HR, CW, SR, A, N |
| Standard | ASTM A519 |
| Application | Mechanical usage |
| Certificate | TS16949, ISO 9001 |
| HS code | 7304319000 |
| Delivery Time | 45 days |
| Pakcing | Bundles or Woodern Boxes |
| Grade | C | Mn | P ≤ | S ≤ | Si | Cr | Mo |
| 1010 | 0.08--0.13 | 0.30--0.60 | 0.40 | 0.05 | -- | -- | -- |
| 1020 | 0.18--0.23 | 0.30--0.60 | 0.40 | 0.05 | -- | -- | -- |
| 1026 | 0.22--0.28 | 0.60--0.90 | 0.40 | 0.05 | -- | -- | -- |
| 1045 | 0.43--0.50 | 0.60--0.90 | 0.40 | 0.05 | -- | -- | -- |
| 4130 | 0.28--0.33 | 0.40--0.60 | 0.04 | 0.04 | 0.15--0.35 | 0.80--1.10 | 0.15--0.25 |
| 4140 | 0.38--0.43 | 0.75--1.00 | 0.04 | 0.04 | 0.15--0.35 | 0.80--1.10 | 0.15--0.25 |
| Grade | Condition |
Tensile Strength (Mpa) |
Yield Strength (Mpa) |
Elongation (%) |
HRB |
| 1020 | HR | 345 | 221 | 25 | 55 |
| CW | 483 | 414 | 5 | 75 | |
| SR | 448 | 345 | 10 | 72 | |
| A | 331 | 193 | 30 | 50 | |
| N | 379 | 234 | 22 | 60 | |
| 4130 | HR | 621 | 483 | 20 | 89 |
| SR | 724 | 586 | 10 | 95 | |
| A | 517 | 379 | 30 | 81 | |
| N | 621 | 414 | 20 | 89 |
| Cold drawn and Cold rolled bearing tubes tolerance control level | |||
| Outer Diameter | Diameter Tolerance | Outer Diameter | Diameter Tolerance |
| (mm) | (mm) | (mm) | (mm) |
| ≤12.70 | ±0.08 | >50.80～63.5 | ±0.25 |
| 12.7～25.40 | ±0.10 | >63.50～76.20 | ±0.30 |
| >25.4～38.10 | ±0.15 | >76.20～101.60 | ±0.40 |
| >38.1～50.80 | ±0.20 | >101.60～203.20 | ±0.50 |
| Remark:Tolrance on outer diameter and Inner diameter,wall thickness can be specified by customer requested, |
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| Product Name | DIN2391 Seamless Cold Drawn Steel Tube |
| Material | ST35, St45, ST52 |
| Delivery Condition | BK, BKW, BKS, GBK, NBK |
| Standard | DIN2391 |
| Size Range | OD: 6-88mm, WT: 1-15mm |
| Application | High precision purpose, auto parts, oil cylinder, etc |
| Round Billet | Bao Steel, Xingcheng Steel, Huai Steel, Zhongtian Steel |
| Keyword | DIN2391 Steel Tube |
| Certificate | TS16949, ISO 9001 |
| HS code | 7304319000 |
| Delivery Time | 45 days |
| Packing | Bundles or Wooden Boxes |
| Steel Grade | Chemical Composition | |||||
| Symbol | Material Number | C Max. |
Si Max. |
Mn | P Max. |
S Max. |
| ST35 | 1.0308 | 0.17 | 0.35 | ≥0.40 | 0.025 | 0.025 |
| ST45 | 1.0408 | 0.21 | 0.35 | ≥0.40 | 0.025 | 0.025 |
| ST52 | 1.0580 | 0.22 | 0.55 | ≤1.60 | 0.025 | 0.025 |
| Steel Grade | BK | BKW | BKS | |||||
| Name | No. | Rm Mpa |
A % |
Rm Mpa |
A % |
Rm Mpa |
ReH Mpa |
A % |
| ST35 | 1.0308 | 480 | 6 | 420 | 10 | 420 | 315 | 14 |
| ST45 | 1.0408 | 580 | 5 | 520 | 8 | 520 | 375 | 12 |
| ST52 | 1.0580 | 640 | 4 | 580 | 7 | 580 | 450 | 10 |
| Steel Grade | GBK | NBK | ||||
| Name | No. | Rm Mpa |
A % |
Rm Mpa |
ReH Mpa |
A % |
| ST35 | 1.0308 | 315 | 25 | 340--470 | 235 | 25 |
| ST45 | 1.0408 | 390 | 21 | 440--570 | 255 | 21 |
| ST52 | 1.0580 | 450 | 22 | 490--630 | 355 | 22 |
Quality Control:
1. Incoming Raw Material Inspection
2. Raw Material Segregation to avoid steel grade mix-up
3. Heating and Hammering End for Cold Drawing
4. Cold Drawing or Cold Rolling, On line inspection
5. Heat Treatment: SR, A, N
6. Straightening/Cutting to specified length/Finished Measuring Inspection
7. Quality Testing in own lab with Tensile Strength, Yield Strength, Elongation, Hardness, Straightness, etc.
8. Packing and Stocking.
Tags: Heavy Wall Thickness Tube, Steel Tube, Seamless Steel Tube
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