Hot Finished Seamless (HFS) Tubular Tube, Hot Finished Seamless (HFS) Tubing, HFS Tuberia Tubular, Hot Finished Welded Type Tubes Price
Amardeep Steel Centre Specialized in Hot finished Seamless Tube Tubing, which are manufactured using superior grade of steel like Stainless Steel 304,304L,310,310S,316,316L,317L. Hot Finished Seamless Mechanical Tubing (HFS) is a 1020/1026 carbon seamless mechanical steel tube that is frequently created from a revolving heated bar and perforated to create a hollow tube. HFS tubing is a less expensive alternative to cold drawn seamless tubing having a wider tolerance range on the outside diameter (OD) and internal diameter (ID) (ID). Hot Finished Seamless mechanical tubing is fabricated to OD and wall dimensions.
Hot Finished Seamless (HFS) tubing is a mechanical tube manufactured by heating a solid steel billet and piercing it with a rotating mandrel to form a hollow seamless tube, without any welded seam. Because the tube is shaped while the steel is still hot, HFS tubing is produced with a wider tolerance range on outside diameter (OD) and inside diameter (ID) than cold drawn seamless (CDS) tubing, which is finished afterward at room temperature. That wider tolerance is what makes HFS tubing less expensive than CDS tube for a given size, while still delivering heavy wall thickness, straightforward machinability, and a wide range of available sizes.
Amardeep Steel Centre supplies HFS tubing in two material families to suit different applications:
Carbon Steel HFS Tubing:
manufactured as a 1020/1026 carbon seamless mechanical steel tube, and also available to the E355 specification shown in the chemical composition and mechanical property tables below. Carbon steel HFS tubing is the standard choice for general mechanical, structural, and hydraulic cylinder applications where strength and cost-efficiency matter more than corrosion resistance.
Stainless Steel HFS Tubing:
manufactured from grades including 304, 304L, 310, 310S, 316, 316L, and 317L. Stainless steel HFS tubing is selected when the application demands corrosion resistance or higher-temperature performance alongside the same heavy-wall, wide-tolerance characteristics of the hot finished seamless process.
Both material families are best suited to applications that do not require tight dimensional accuracy, since the hot finishing process produces a higher surface roughness and lower surface smoothness than cold drawing. Pipes are typically selected by yield strength and pressure capacity, both of which vary with outer diameter and wall thickness. Hot finished seamless tube and pipe grades span ASTM A519, A106, A179, and A192 among others, covering application types from high-temperature and high-pressure service to general structural tubing. As a result, HFS tubing is used in machine parts, liquid transfer lines, structural construction applications, and the mechanical components listed further below.
Hot Finished Seamless Mechanical Tubing Specifications
| Parameter | Details |
|---|---|
| Standard | ASTM, ASME, JIS, AISI, AMS, EN, SAE, DIN, NF, GOST, DS, DTD, GB |
| Precision / Instrumentation-Scale Tube — OD | 4.0mm to 60.0mm |
| Large-Diameter Mechanical / Structural Pipe — OD | 5.0mm to 1219.2mm |
| Wall Thickness | Up to 20mm (heavier wall sections available on request) |
| SWG & BWG | 10, 12, 14, 16, 18, 20 SWG |
| Schedule | SCH5, SCH10, SCH10S, SCH20, SCH30, SCH40, SCH40S, STD, SCH60, SCH80, XS, SCH120, SCH140, SCH160, XXS |
| Length | Single Random, Double Random, Standard & Cut Length |
| Finish | Polished, AP (Annealed & Pickled), BA (Bright Annealed), MF, No.1, No.4, 2B, HL, 8K, Mirror Finish |
| Form | Round, Square, Hollow, Rectangular, Hydraulic, Coiled, Straight, “U” Shape, Pancake Coils |
| Types | Seamless, ERW, EFW, Welded, Fabricated, CDW, DOM, CEW |
| End | Plain End, Beveled End, Threaded Pipe, Screwed Ends |
| Value-Added Services | Draw & Expansion to required size and length, Polishing (Electro & Commercial), Annealing & Pickling, Bending, Machining |
| Manufacturing Technique | Hot piercing/extrusion (HFS process); cold drawn, bright annealed, and solid-solution treated options also available |
| Test Certificates | Manufacturer Test Certificate, Laboratory Test Certificate from a government-approved lab, third-party inspection available on request |
Chemical Composition of HFS Steel Tube
The table below reflects the carbon steel E355 specification. Stainless steel HFS tubing (304, 304L, 310, 310S, 316, 316L, 317L) follows the standard chemical composition for each respective stainless grade rather than this E355 table — contact us for grade-specific stainless composition data.
| Grade | C | Mn | Si | P | S |
|---|---|---|---|---|---|
| E355 | 0.22% max | 1.6% max | 0.55% max | 0.030% max | 0.035% max |
For tighter-tolerance precision tube grades, our EN 10305-1 Grade E235 Carbon Steel Tubes may also be relevant.
HFS Tubing Mechanical and Physical Properties
Properties below apply to carbon steel E355 grade HFS tubing.
| Wall ≤16mm (MPa) | Wall 16–40mm (MPa) | Wall 40–65mm (MPa) | Tensile Rm (MPa min) | Elongation % |
|---|---|---|---|---|
| 355 (yield) | 345 (yield) | 335 (yield) | 490 | 20 / 18 |
Tolerance Chart of Hot Finished Seamless Mechanical Tubing
Outside Diameter Tolerance
| Outside Diameter (D) | Tolerance |
|---|---|
| D ≤ 219.1mm | ±1% or ±0.5mm, whichever is greater |
| D > 219.1mm | ±1% |
Wall Thickness Tolerance
Wall thickness tolerance depends on the ratio of wall thickness to outside diameter (Wt/D).
| Outside Diameter (D) | Wt/D Ratio | Tolerance |
|---|---|---|
| D ≤ 219.1mm | Any | ±12.5% or ±0.4mm, whichever is greater |
| D > 219.1mm | Wt/D ≤ 0.025 | ±20% |
| D > 219.1mm | 0.025 < Wt/D ≤ 0.050 | ±15% |
| D > 219.1mm | Wt/D > 0.050 | ±12.5% |
Standard Dimension Chart
| Outside Diameter (mm) | Available Wall Thicknesses (mm) |
|---|---|
| 60.3 | 4.5, 5.0, 6.3, 8.0, 9.5, 12.5 |
| 88.9 | 4.0, 4.5, 5.0, 6.3, 8.0, 8.6, 9.5, 12.5, 16.0, 19.0 |
| 114.3 | 4.5, 5.6, 6.3, 8.0, 9.5, 12.5, 16.0, 19.0, 25.4 |
| 168.3 | 4.5, 5.0, 5.6, 6.3, 8.0, 9.5, 12.5, 16.0, 25.0, 30.0, 35.0, 40.0, 50.0 |
| 219.1 | 5.0, 6.3, 7.0, 9.5, 12.5, 19.0, 25.0, 35.0, 40.0, 45.0, 50.0, 60.0 |
| 323.9 | 6.3, 7.1, 9.5, 12.7, 14.2, 19.0, 25.0, 28.6, 31.8, 35.0, 41.2, 47.6, 50.0, 55.5, 63.5, 75.0, 90.0 |
| 406.4 | 9.5, 12.7, 19.1, 25.0, 28.0, 30.0, 36.0, 40.0, 50.0, 55.0, 60.0, 70.0, 76.2, 80.0, 88.9, 90.0, 100.0 |
| 508.0 | 20.0, 25.0, 35.0, 40.0, 50.0, 60.0, 70.0, 80.0, 110.0 |
| 610.0 | 12.7, 20.0, 25.0, 30.0, 35.0, 40.0, 45.0, 50.0, 60.0, 70.0, 80.0, 85.0, 95.0, 100.0, 110.0 |
| 660.0 | 40.0, 70.0, 80.0, 100.0 |
Sizes shown are a representative sample across the standard range; the complete chart includes intermediate diameters and wall thicknesses not shown here. Contact us for the full size list or for sizes outside this range.
Applications of Hot Finished Seamless Mechanical Tube
- Bushings
- Bosses
- Collars
- Oil and gas components
- Axles
- Large diameter hydraulic cylinders
- Hinges
- Rollers
- Spacers and sleeves
- Drilling equipment
- Agricultural components
For hydraulic cylinder tubing with tighter tolerances, see our STKM 13A Carbon Steel Tube & Pipe and for honed hydraulic cylinder applications, our STKM13C Carbon Steel Tubes may also be suitable.
Other Types of Hot Finished Seamless Mechanical Tubing
- Hot Finished Seamless Mechanical Steel Tube
- Hot Finished Seamless Mechanical Mild Steel Tube
- Hot Finished Seamless Stainless Steel Pipes
- HFS Steel Tube
- HFS Seamless Tube
- Hot Finished Seamless Pipes
- Hot Finished Seamless Steel Pipe
- HFS Tubing
Hot Finished vs. Cold Drawn — Quick Comparison
| Hot Finished Seamless (HFS) | Cold Drawn Seamless (CDS) | |
|---|---|---|
| OD/ID Tolerance | Wider | Tighter |
| Relative Cost | Lower | Higher |
| Surface Finish | Rougher | Smoother |
| Best For | Structural/mechanical parts where strength and cost matter more than precision | Precision mechanical and hydraulic components requiring tight dimensional accuracy |
Frequently Asked Questions About HFS Tubing
What does HFS tube mean?
HFS stands for Hot Finished Seamless, referring to a manufacturing process where a solid steel billet is heated and pierced to form a hollow tube without any welded seam. The term is commonly used interchangeably with “hot finished seamless mechanical tube” or “HFS tubing” across steel supplier catalogs and engineering specifications.
What is hot finished seamless mechanical tube used for?
Hot finished seamless mechanical tube is used in applications such as bushings, bosses, collars, axles, large diameter hydraulic cylinders, hinges, rollers, spacers, sleeves, drilling equipment, and agricultural components. It’s well suited to structural and mechanical uses where heavy wall thickness matters more than tight dimensional precision.
What is HFS material made of?
HFS material is typically a 1020/1026 carbon seamless mechanical steel, though Amardeep also manufactures HFS tubing in stainless steel grades including 304, 304L, 310, 310S, 316, 316L, and 317L. The exact grade selected depends on the required strength, corrosion resistance, and application environment.
What sizes are available in HFS steel tube?
HFS steel tube outside diameter typically ranges from 5mm to 1219.2mm, with wall thickness up to 20mm. Hot Finished Mechanical Mild Steel Tube is also available in smaller outside diameters down to 4mm. Custom sizing outside these ranges can be manufactured on request to match specific project requirements.
What is the difference between hot finished and cold drawn tube?
Hot finished seamless (HFS) tube is formed from a heated, rotating bar and pierced into a hollow shape, resulting in a wider OD/ID tolerance range and lower cost. Cold drawn seamless (CDS) tube is drawn through a die at room temperature afterward, giving tighter dimensional tolerance and a smoother finish, but at a higher price point.
What are the mechanical properties of HFS tube?
For the E355 grade, HFS tube offers an upper yield stress ranging from approximately 335 to 355 MPa depending on wall thickness, a minimum tensile strength of 490 MPa, and elongation of at least 18% (transverse) to 20% (longitudinal). Properties vary by grade and wall thickness band per the applicable ASTM or EN specification.
What standards and grades apply to hot finished seamless pipe?
Hot finished seamless pipe is manufactured to standards including ASTM, ASME, JIS, AISI, AMS, EN, SAE, DIN, NF, GOST, and GB, with common grades spanning ASTM A519, A106, A179, and A192. These specifications define application types such as high temperature service, high pressure service, and structural tubing.
What testing certification is available for HFS tubing?
HFS tubing can be supplied with a Manufacturer Test Certificate, a Laboratory Test Certificate from a government-approved lab, and inspection under third-party agencies on request. This documentation confirms chemical composition and mechanical properties meet the specified grade requirements before shipment.
What end finishes are available for hot finish seamless tube?
Hot finish seamless tube is available with plain ends, beveled ends, threaded pipe ends, and screwed ends, depending on the intended application and downstream connection method. Surface finish options include polished, annealed and pickled (AP), bright annealed (BA), mirror finish, and several mill finish grades such as No.1, No.4, and 2B.
Why choose HFS tubing over other mechanical tube types?
HFS tubing offers heavy wall thickness at a lower cost than cold drawn alternatives, easier machining, and a wide range of available sizes, making it a practical choice for processing equipment and structural components where dimensional accuracy is less critical than strength and cost-efficiency.
Related Products
- DIN 2391 ST52 Tubes
- EN 10305-1 E235 Tubes
- ASTM A519 Mechanical Tubes
- STKM13A Tubes,STKM13C Tubes
- Hydraulic Tubes
- Carbon Steel Seamless Tubes
- Cold Drawn Seamless Tubes
Get a Competitive Quote for Hot Finished Seamless Mechanical Tubing
Amardeep Steel Centre supplies hot finished seamless mechanical tubing with complete documentation including EN 10204 3.1 mill test certificates, third-party inspection on request, and full material traceability. Ready stock available in Mumbai with worldwide export capability. We supply HFS tubing in a wide range of sizes and grades for mechanical, hydraulic, structural, automotive, and heavy engineering applications.
