TORICH INTERNATIONAL LIMITED
| Material | Seamless carbon steel and alloy steel mechanical tubing |
| Main Grades | 1045, 4130, 4140; optional 1020, 1026 |
| Wall Thickness | 1–12 m, customized fixed length or random length |
| Payment Terms | L/C,D/A,D/P,T/T,Western Union, |
| Outside Diameter | 1–350 mm, custom sizes available |
| Standard | ASTM A519 / ASME SA519 |
| Tolerance Range | OD and wall thickness can be controlled to ±0.10 mm for precision sizes; ASTM A519 tolerance tables apply by OD, wall, and thermal treatment condition |
| Straightness | Typically ≤0.5–1.0 mm/m for precision cold-drawn tubes; stricter control available by agreement |
| Heat Treatment | As drawn, stress relieved, annealed, normalized, quenched and tempered |
| Supply Ability | 5000Tons per Year |
| Delivery Time | 30-45 work days |
| Packaging Details | In bundles or in wooden boxes. |
| Brand Name | TORICH |
| Model Number | ASTM A519 |
| Certification | ISO9001, ISO14001, TS16949 |
| Place of Origin | ZHEJIANG, CHINA |
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Product Specification
| Material | Seamless carbon steel and alloy steel mechanical tubing | Main Grades | 1045, 4130, 4140; optional 1020, 1026 |
| Wall Thickness | 1–12 m, customized fixed length or random length | Payment Terms | L/C,D/A,D/P,T/T,Western Union, |
| Outside Diameter | 1–350 mm, custom sizes available | Standard | ASTM A519 / ASME SA519 |
| Tolerance Range | OD and wall thickness can be controlled to ±0.10 mm for precision sizes; ASTM A519 tolerance tables apply by OD, wall, and thermal treatment condition | Straightness | Typically ≤0.5–1.0 mm/m for precision cold-drawn tubes; stricter control available by agreement |
| Heat Treatment | As drawn, stress relieved, annealed, normalized, quenched and tempered | Supply Ability | 5000Tons per Year |
| Delivery Time | 30-45 work days | Packaging Details | In bundles or in wooden boxes. |
| Brand Name | TORICH | Model Number | ASTM A519 |
| Certification | ISO9001, ISO14001, TS16949 | Place of Origin | ZHEJIANG, CHINA |
| High Light | precision steel pipe ，precision seamless pipe | ||
| Item | Description |
|---|---|
| Material | Seamless carbon steel and alloy steel mechanical tubing |
| Standard | ASTM A519 / ASME SA519 |
| Main Grades | 1045, 4130, 4140; optional 1020, 1026 |
| Outside Diameter | 1-350 mm, custom sizes available |
| Wall Thickness | 1-50 mm, depending on OD and production route |
| Length | 1-12 m, customized fixed length or random length |
| Tolerance Range | OD and wall thickness can be controlled to ±0.10 mm for precision sizes; ASTM A519 tolerance tables apply by OD, wall, and thermal treatment condition |
| Straightness | Typically ≤0.5-1.0 mm/m for precision cold-drawn tubes; stricter control available by agreement |
| Surface Condition | Cold drawn, cold rolled, bright finish, oiled, phosphate, anti-rust oil, plastic end caps |
| Heat Treatment | As drawn, stress relieved, annealed, normalized, quenched and tempered |
| Manufacturing Technique | Hot worked followed by cold drawing or cold rolling |
| Testing | Tensile test, hardness test, flaring test, flange test, flattening test, reverse flattening test, hydrostatic test, or nondestructive electric test |
| Characteristic | Technical Meaning |
|---|---|
| Seamless structure | No weld seam, suitable for machined mechanical parts where uniform strength and concentricity are required. |
| Precision dimensional control | Cold-drawn ASTM A519 tubing can be supplied with close OD/ID tolerance; commercial A519 tolerance references show OD/ID tolerances varying by OD range and final thermal condition. |
| Grade-specific strength selection | 1045 provides medium-carbon strength and machinability; 4130 provides Cr-Mo toughness with better weldability than 4140; 4140 provides higher hardenability and strength after heat treatment. |
| Controlled heat-treatment condition | HR, CW, SR, A, N, or Q&T condition must be defined because mechanical properties change significantly with final processing. |
| Machining suitability | Suitable for turning, boring, honing, grinding, and CNC machining of precision sleeves, shafts, bushings, and bearing-related parts. |
| Surface protection | Anti-rust oil and plastic end caps reduce oxidation and protect the tube ends during sea shipment and warehouse storage. |
| Professional Concern | Our Solution |
|---|---|
| Buyers often need stable OD/ID tolerance for CNC machining, not only a nominal tube size. | We confirm OD, ID, wall thickness, ovality, straightness, and final machining allowance before production. For precision sizes, OD and wall tolerance can be controlled to ±0.10 mm when technically feasible. |
| 1045, 4130, and 4140 mechanical properties vary greatly by heat treatment. | We identify the required condition before quotation: hot rolled, cold worked, stress relieved, annealed, normalized, or quenched and tempered. MTC values are supplied by heat number, and third-party inspection can be arranged. |
| Cr-Mo grades require reliable traceability and testing for critical mechanical parts. | Tubes can be supplied with chemical analysis, tensile test, hardness test, NDT, hydrostatic test, and end protection. ASTM A519 permits supplementary requirements when requested in the purchase order. |
| Standard | Brief Description |
|---|---|
| ASTM A519 | Seamless carbon and alloy steel mechanical tubing, hot-finished or cold-finished. |
| ASME SA519 | ASME equivalent specification for seamless carbon and alloy steel mechanical tubing. |
| EN 10305-1 | European precision seamless cold-drawn steel tubes for precision applications. |
| EN 10297-1 | Seamless circular steel tubes for mechanical and general engineering purposes. |
| JIS G3445 | Japanese carbon steel tubes for machine structural purposes. |
| GB/T 3639 | Chinese cold-drawn or cold-rolled precision seamless steel tubes. |
| GB/T 8162 | Chinese seamless steel tubes for structural purposes. |
| GOST 8734 | Russian cold-deformed seamless steel tubes. |
| Grade | C % | Mn % | P Max % | S Max % | Si % | Cr % | Mo % |
|---|---|---|---|---|---|---|---|
| 1020 | 0.18-0.23 | 0.30-0.60 | 0.040 | 0.050 | -- | -- | -- |
| 1026 | 0.22-0.28 | 0.60-0.90 | 0.040 | 0.050 | -- | -- | -- |
| 1045 | 0.43-0.50 | 0.60-0.90 | 0.040 | 0.050 | -- | -- | -- |
| 4130 | 0.28-0.33 | 0.40-0.60 | 0.040 | 0.040 | 0.15-0.35 | 0.80-1.10 | 0.15-0.25 |
| 4140 | 0.38-0.43 | 0.75-1.00 | 0.040 | 0.040 | 0.15-0.35 | 0.80-1.10 | 0.15-0.25 |
| Grade / Condition | Tensile Strength Min | Yield Strength Min | Elongation Min | Hardness Typical |
|---|---|---|---|---|
| 1020 Cold Drawn | 420 MPa / 61 ksi | 350 MPa / 51 ksi | 10% | HRB 75-85 |
| 1026 Cold Drawn | 483 MPa / 70 ksi | 414 MPa / 60 ksi | 10% | HRB 80-90 |
| 1045 Cold Worked | 621 MPa / 90 ksi | 552 MPa / 80 ksi | 5% | HRB 90 |
| 4130 Stress Relieved | 724 MPa / 105 ksi | 586 MPa / 85 ksi | 10% | HRB 95 |
| 4140 Stress Relieved | 855 MPa / 120 ksi | 689 MPa / 100 ksi | 10% | HRB 100 |
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Importer,Exporter,Trading Company,Seller
Year Established:
1997
Total Annual:
25000000-30000000
Employee Number:
100~200
Ecer Certification：
Verified Supplier
Company Overview A Professional Steel Tube Manufacturer and Solution Provider TORICH INTERNATIONAL LIMITED integrates steel tube manufacturing, international trade, warehousing, technical support and customized processing. Our manufacturing operations cover cold drawing, cold rolling, heat treat... Company Overview A Professional Steel Tube Manufacturer and Solution Provider TORICH INTERNATIONAL LIMITED integrates steel tube manufacturing, international trade, warehousing, technical support and customized processing. Our manufacturing operations cover cold drawing, cold rolling, heat treat...
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