Cold Drawn Hexagonal Seamless Steel Tube ASTM A500
TORICH cold drawn hexagonal seamless steel tube is carbon steel tubing for drawing-defined structural components. The seamless manufacturing route and hexagonal profile are specified to suit the component geometry. Orders should identify the ASTM A500 grade, standard edition, final delivery condition and approved cross-sectional drawing.
The existing product listing identifies cold drawing, an internal hexagonal configuration and lengths up to 12,000 mm. Internal and external profiles must therefore be confirmed before ordering. Existing product specification.
Specifications
| Item | Specification |
|---|---|
| Material | Carbon steel |
| Governing standard | ASTM A500/A500M-23, subject to the edition specified in the purchase order |
| Grade | B, C or D; grade and manufacturing availability require confirmation |
| Manufacturing process | Cold drawn, seamless |
| Cross section | Hexagonal profile to an approved drawing; identify whether the hexagon is internal, external or both |
| Outside diameter / dimensions | Drawing-specific; use outside diameter for a circular exterior, or across-flats and across-corners dimensions for an external hexagon |
| Bore | Internal hexagon dimensions, corner radii and orientation to be specified where applicable |
| Wall thickness | Drawing-specific; define minimum wall thickness and inspection locations |
| Length | Custom lengths of 1–12 m, subject to profile and order confirmation; listed maximum: 12,000 mm |
| Tolerance range | Profile dimensions, wall thickness, radii and twist to be agreed under ASTM A500 Section 12; no universal hexagonal tolerance is claimed |
| Straightness | Agree the acceptance limit for the special profile. General A500M reference: maximum deviation = 2 × L mm, where L is total length in metres; 12 mm over 6 m |
| Surface condition | As agreed in the order; specify cleanliness, corrosion protection and any numerical roughness requirement |
| Heat treatment | Grades B/C: stress relief or annealing may be agreed. Grade D: mandatory heat treatment under the standard |
| Ends | Square cut; specify internal and external deburring requirements |
Special-shape availability and tolerances require agreement with the manufacturer. The general straightness reference is not a verified precision-straightening capability. ASTM A500/A500M-23, Sections 11–12.
Main Features
- Defined Grade C strength: minimum yield strength of 345 MPa and tensile strength of 425 MPa under A500M-23, including special tubular shapes.
- Specified hexagonal geometry: across-flats dimensions, corner radii, bore orientation and twist are controlled through the agreed drawing.
- Seamless construction: the specified manufacturing route eliminates a longitudinal manufacturing weld seam.
- Grade-dependent delivery condition: Grade D requires heat treatment at a minimum of 590°C, with holding time prescribed by the standard.
Strength and heat-treatment values are standard requirements, rather than measurements for an individual shipment. ASTM A500/A500M-23, Sections 6 and 9.
Our Advantages
- Clear fit requirements. Drawing-based ordering distinguishes an internal hexagon from an external hexagon and defines the mating dimensions. This establishes measurable acceptance criteria instead of relying on an ambiguous “hexagonal tube size.”
- Grade-specific technical information. Separate chemistry and mechanical-property tables identify the selected grade. The purchase specification should also identify the final delivery condition so that cold drawing and any subsequent heat treatment are considered when confirming compliance.
- Defined inspection documentation. Specify heat-analysis results, tension-test results and an inspection report against the approved profile drawing in the purchase order. Third-party inspection is listed as available, subject to order confirmation.
These purchasing controls address special-shape dimensional agreement and certification requirements. ASTM A500/A500M-23, Sections 12 and 18. Third-party inspection availability is stated in the existing product specification.
Applicable Standards
ASTM A500/A500M governs this product description. The other standards below are references for separately specified orders; they do not establish equivalent grades or automatic multiple-standard compliance.
| System | Standard and relevance |
|---|---|
| ASTM | A500/A500M-23: cold-formed carbon steel structural tubing, including seamless and special shapes. Specify A500M when ordering to SI requirements. |
| EN | EN 10305-1:2016: seamless cold drawn precision steel tubes; application to other cross sections requires an appropriate agreed specification. |
| GOST | GOST 13663-86: technical requirements for shaped steel tubes; assess the required profile and delivery requirements separately. |
| JIS | JIS G 3445:2025: carbon steel tubes for machine structure; assess grade, geometry and delivery requirements separately. |
| GB | GB/T 3094-2012: cold drawn shaped steel tubes; also referenced in the existing listing. |
Sources: ASTM, BSI, Rosstandart, Japanese Standards Association, and SAMR.
Application
Agricultural machinery — a hexagonal locating sleeve for a stationary implement-frame connection. The profile can provide rotational location for a matching component. Suitability requires the buyer’s engineering assessment of fit, loads and connection design; this is a proposed application, not a documented installation.
Chemical Composition
ASTM A500/A500M-23 contains three grades: B, C and D. Values below are heat-analysis limits in mass percent.
| Grade | C, max. | Mn, max.* | P, max. | S, max. | Cu, min.** |
|---|---|---|---|---|---|
| B | 0.26 | 1.35 | 0.035 | 0.035 | 0.20 |
| C | 0.23 | 1.35 | 0.035 | 0.035 | 0.20 |
| D | 0.26 | 1.35 | 0.035 | 0.035 | 0.20 |
Mechanical Properties
The following A500M-23 minimum requirements apply to special tubular shapes.
| Grade | Tensile strength, min. (MPa) | Yield strength, min. (MPa) | Elongation in 50 mm, min. (%) |
|---|---|---|---|
| B | 400 | 315 | 23* |
| C | 425 | 345 | 21** |
| D | 400 | 250 | 23* |
Q: Are you a trading company or a manufacturer?
A: We are a manufacturer and can also provide trading services.
Q: How long is your delivery time?
A: The typical delivery time is 10-15 days for goods in stock and 30-40 days for goods not in stock, depending on the order quantity. The delivery schedule is confirmed with the order.
Q: Do you provide samples? Are they free of charge?
A: Samples can be provided free of charge; the buyer pays the freight cost. Please confirm sample availability before shipment.
Q: What are your payment terms?
A: For orders below USD 2,000, payment is 100% in advance. For orders above USD 2,000, payment is 30% T/T in advance, with the balance paid before shipment. Terms for orders of exactly USD 2,000 are confirmed in the quotation.
