JIS3445 STKM13A Precision Cold Drawn Seamless Steel Tube 4-60mm OD with ±0.03mm High Precision Tolerance
Price:
Negotiable
MOQ:
2Tons
Delivery Time:
20days
Brand:
Joyruns
Product Description
JIS3445 STKM13A Precision Cold Drawn Seamless Steel Tube
High-performance seamless steel tubes engineered for mechanical engineering applications and precision hydraulic systems with superior dimensional accuracy and mechanical properties.
Product Overview
JIS3445 STKM13A precision cold drawn seamless steel tubes are manufactured to meet stringent standards for mechanical engineering and general technical applications. These tubes are specifically designed for hydraulic systems, automotive components, machinery, and other precision applications requiring exceptional finish, cleanliness, and high mechanical performance.
Chemical Composition
| Grade | Designation | C (%) | Si (%) | Mn (%) | P (%) | S (%) | Nb or V |
|---|---|---|---|---|---|---|---|
| Grade 13 | STKM 13A | 0.25 max. | 0.35 max. | 0.30~0.90 | 0.040 max. | 0.040 max. | - |
| Grade 13 | STKM 13B | 0.25 max. | 0.35 max. | 0.30~0.90 | 0.040 max. | 0.040 max. | - |
Mechanical Properties
| Standard | Steel Grade | Tensile Strength (MPa) | Yield Point (MPa) | Elongation (%) |
|---|---|---|---|---|
| JIS G3445 | STKM13A | ≥375 | ≥215 | ≥30 |
| JIS G3445 | STKM13B | ≥440 | ≥305 | ≥20 |
Dimensional Tolerances
| Name | Range (mm) | German Standard (mm) | Corporate Internal Control (mm) | Special High-Precision (mm) |
|---|---|---|---|---|
| Outer Diameter | 4-30 | ±0.08 | ±0.05 | ±0.03 |
| 31-40 | ±0.15 | ±0.05 | ±0.03 | |
| 41-50 | ±0.20 | ±0.08 | ±0.03 | |
| 51-60 | ±0.25 | ±0.08 | ±0.03 | |
| Wall Thickness | 0.5-7 | ±10% | ±10%, Min±0.05 | ±10%, Min±0.03 |
| Length | Standard | ±10mm (Automotive industry pipe length can be cut according to customer requirements) | ||
Heat Treatment Processes
| Delivery Condition | Heat Treatment Process |
|---|---|
| +C | Cold drawn/hard. After the final cold forming no heat treatment. |
| +LC | Cold drawn/soft. After the final heat treatment-limiting deformation, cold drawn, allowing a degree of cold deformation |
| +SR | Steel heat treatment applied after the last cold deformation process, resulting in residual stress that increases machining difficulty |
| +A | After final cold deformation, placed in controlled atmosphere furnace for annealing |
| +N | After final cold deformation, placed in controlled atmosphere furnace at temperature above phase transition point for annealing |
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Company
Changzhou Joyruns Steel Tube CO.,LTD
Location
No.143 Qingyang North road,Tianning district. Changzhou
Contact Person
Lee