ASTM A519 Standard 1045 4130 4140 Grades Precision Seamless Mechanical Tube with Precision Dimensional Control
Price:
Negotiable
MOQ:
5 Tons
Delivery Time:
30-45 work days
Brand:
TORICH
Product Description
ASTM A519 1045 4130 4140 Precision Seamless Carbon Steel Mechanical Tube
ASTM A519 precision seamless mechanical tube is designed for machined mechanical parts that require controlled OD/ID accuracy, stable wall thickness, good straightness, and reliable mechanical strength after cold drawing, stress relieving, annealing, normalizing, or quenching and tempering. For 1045, 4130, and 4140 grades, the key purchasing focus is not only the steel grade, but also the final heat-treatment condition, tolerance class, test method, surface protection, and machinability requirement. ASTM A519 covers seamless hot-finished and cold-finished carbon and alloy steel mechanical tubing up to 12-3/4 in. OD for round tubes, with round, square, rectangular, and special sections available by order.
Specifications
| 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 |
Main Characteristics
| 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. |
Our Advantages
| 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. |
Applicable Standards
| 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. |
Application Field
Automotive steering column intermediate shaft sleeve: ASTM A519 1045, 4130, or 4140 precision seamless mechanical tube can be used for machined shaft sleeves where concentricity, wall uniformity, fatigue resistance, and stable mechanical properties are required.
Chemical Composition
| 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 |
Mechanical Properties
| 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 |
Frequently Asked Questions
Are you trading company or manufacturer?
Manufacturer, also can do trading.
How long is your delivery time?
Generally speaking, it is 10-15 days if the goods are in stock, or it is 30-40 days if the goods are not in stock, according to quantity.
Do you provide samples? Is it free or extra?
Yes, we could offer the sample for free charge but need pay the cost of freight.
What is your terms of payment?
Payment ≤ 2000 USD, 100% in advance. Payment ≥ 2000 USD, 30% T/T in advance, balance before shipment. If you have another question, please feel free to contact with me.
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Get in Touch
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Company
TORICH INTERNATIONAL LIMITED
Location
Suite 1604-3, Hongan Plaza, #258 Die Yuan Road, Yinzhou District, Ningbo City, China
Contact Person
Richard SHEN