ASTM A209 tubes
ASTM A209 tubes - seamless steel tube
Factory supply ASTM A556 straight & U-bend seamless tubes, full dimensional precision, complete MTC certification, custom machining for thermal power station feedwater heater & superheater core components.
ASTM A556/A556M is the official standard for seamless cold-drawn carbon steel tubes used exclusively in tubular feedwater heaters and boiler superheater heat exchange systems. It defines minimum-wall thickness seamless tubing, including factory pre-bent U-tube finished products as required by power station heat exchanger design.
All A556 tubes adopt precise cold-drawn forming process with ultra-smooth inner surface to maximize heat exchange efficiency; post-drawing annealing guarantees sufficient ductility for tube sheet expansion, rolling and field bending without cracking.
ASTM A556 is available in different grades, such as Grade A2, Grade B2, and Grade C2. The specific grade depends on the requirements of the application and the desired mechanical properties. ASTM A556 steel tubes can be sourced from various manufacturers and suppliers. It's important to ensure that the tubes meet the requirements of the ASTM A556 specification and any additional project specifications. ASTM A556 steel pipe is mainly for high-temperature heater systems. World iron&steel manufactures and offers ASTM A556 Grade C2 seamless U-bent steel tubes.
ASTM A556 steel tubes can be delivered in the form of U-bend tubes for feedwater heater applications. The U-bend configuration allows for efficient heat transfer and is commonly used in tubular feedwater heaters. The ASTM A556 specification covers minimum-wall-thickness, seamless cold-drawn carbon steel tubes for these purposes.
1.1 This specification covers minimum-wall-thickness, seamless cold-drawn carbon steel tubes, including bending into the form of U-tubes if specified, for use in tubular feedwater heaters.
1.2 The tubing sizes covered shall be 5/8 to 1¼ in. [15.9 to 31.8 mm] outside diameter, inclusive, with minimum wall thicknesses equal to or greater than 0.045 in. [1.1 mm].
1.3 Optional supplementary requirements are provided and, when desired, shall be stated in the order.
1.4 The values stated in either inch-pound units or SI units are to be regarded separately as the standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the specification. The inch-pound units shall apply unless the “M” designation of this specification is specified in the order.
| Grade | C % | Si % | Mn % | P % | S % |
|---|---|---|---|---|---|
| A2 | 0.18 | ... | 0.27–0.63 | 0.035 | 0.035 |
| B2 | 0.27 max | 0.10 min | 0.29–0.93 | 0.030 max | 0.030 max |
| C2 | 0.30 max | 0.10 min | 0.29–1.06 | 0.030 max | 0.030 max |
| Grade | Tensile Strength, min, ksi [MPa] |
Yield Strength, min, ksi [MPa] |
Elongation in 2 in. or 50 mm, min, % (Longitudinal) |
Hardness Requirement |
|---|---|---|---|---|
| A2 | 47 [320] | 26 [180] | 35 | HR B 72 |
| B2 | 60 [410] | 37 [260] | 30 | HR B 79 |
| C2 | 70 [480] | 40 [280] | 30 | HR B 89 |
Tolerances according to specification or by agreement. Standard tolerances are as follows:
| Processing Method | OD | Wall Thickness (WT) |
|---|---|---|
| Hot finished | ±1% | ±12.5% |
| Cold finished | ±0.75% | ±10% |
The following table shows the relationship between JIS and major international standards.
| JIS | ASTM | BS | DIN | NF | ISO | Index No. | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Standard | Grade | Type | Standard | Grade | Type | Standard | Grade | Type | Standard | Grade | Type | Standard | Grade | Type | Standard | Grade | Type | |
| G3461 | STB340 | C | A161 | LC | C | 3059 | HFS320 | C | A49-245 | TS34e | C | C010 | ||||||
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
With years of expertise, we provide a wide range of steel tube processing services. From basic sawing and machining to complex bending and upsetting operations, we support you at every stage of your project.
Our capabilities include eccentricity reduction and concentricity improvement through turning and grinding. We specialize in creating complex geometries using rotary swaging and axial forming, and offer property modifications through partial heat treatment to meet your exact requirements.
A range to meet your needs
High-quality steel solutions for diverse mechanical engineering applications – reliable, precise, and built for performance.
Premium steel products for demanding construction projects – from bridges to offshore structures, built to last.
Versatile components for the automotive industry – precision, quality, and processing expertise for every application.
Robust tubes for plant engineering and energy systems – designed for extreme conditions and long-term efficiency.
Versatile solutions for modern infrastructure – supporting reliable supply networks and large-scale construction projects.
Versatile solutions for hydraulic systems – durable, pressure-resistant, and engineered for maximum reliability.
| Condition | Typical Application |
|---|---|
| High Temperature | Boilers, superheaters, steam headers |
| Low Temperature | Cryogenic processing systems |
| High Pressure | Power & process piping |
| Corrosive Media | Chemical & petrochemical plants |
| Creep Service | Thermal power stations |
| Product | Specification |
|---|---|
| Seamless Pipes | ASTM A335 P1 / P5 / P9 / P11 / P22 / P91 |
| Butt Weld Fittings | ASTM A234 WP1 / WP5 / WP9 / WP11 / WP22 / WP91 |
| Forged Fittings & Flanges | ASTM A182 F1 / F5 / F9 / F11 / F22 / F91 |
Sunny Steel supplies alloy steel piping systems worldwide, supporting projects that demand certified materials, full traceability and long-term operational reliability.
Steel pipe delivery status(condition): cold / hard (BK), cold / soft (BKW), after cold stress relief annealing (BKS), annealing (GBK), normalized (NBK).
| Term | Symbol | Explanation |
|---|---|---|
| Cold-finished/hard (cold-finished as-drawn) | BK | No heat treatment after the last cold-forming process. The tubes therefore have only low deformability. |
| Cold-finished/soft (lightly cold-worked) | BKW | After the last heat treatment there is a light finishing pass (cold drawing). With proper subsequent processing, the tube can be cold-formed (e.g. bent, expanded) within certain limits. |
| Annealed | GBK | After the final cold-forming process the tubes are annealed in a controlled atmosphere or under vacuum. |
| Normalized | NBK | The tubes are annealed above the upper transformation point in a controlled atmosphere or under vacuum. |
The general cold strip mills, volume should go through continuous annealing (CAPL unit) to eliminate cold hardening and rolling stress, or batch annealing reach the mechanical properties of the corresponding standard specifies. Cold rolled steel surface quality, appearance, dimensional accuracy better than hot-rolled plate, and right-rolled thin product thickness is about 0.18mm, so the majority of users favor.
Cold rolled steel coil substrate products deep processing of high value-added products. Such as electro-galvanized, hot dip galvanized, electro-galvanized fingerprint resistant, painted steel roll damping composite steel, PVC laminating steel plates, etc., so that the excellent quality of these products has a beautiful, high resistance to corrosion, has been widely used.
Cold rolled steel coil finishing after annealing, cut the head, tail, trimming, flattening, smooth, heavy volume, or longitudinal clipboard. Cold-rolled products are widely used in automobile manufacturing, household electrical appliances, instruments, switches, buildings, office furniture and other industries. Steel plate strapping package weight of 3 to 5 tons. Flat sub-volume typically 3 to 10 tons / volume. Coil diameter 6m.
Bare packing/bundle packing/crate packing/wooden protection at the both sides of tubes and suitably protected for seaworthy delivery or as requested.
There are probably hundreds of different methods for packing a pipe, and most of them have merit, but there are two principles that are vital for any method to work: prevent rusting and sea transportation security.
Our packing can meet any needs of the customers.
Commonly used alloying elements and their effects are listed in the table given below.
| Alloying Elements | Effect on the Properties |
|---|---|
| Chromium | Increases Resistance to corrosion and oxidation. Increases hardenability and wear resistance. Increases high temperature strength. |
| Nickel | Increases hardenability. Improves toughness. Increases impact strength at low temperatures. |
| Molybdenum | Increases hardenability, high temperature hardness, and wear resistance. Enhances the effects of other alloying elements. Eliminate temper brittleness in steels. Increases high temperature strength. |
| Manganese | Increases hardenability. Combines with sulfur to reduce its adverse effects. |
| Vanadium | Increases hardenability, high temperature hardness, and wear resistance. Improves fatigue resistance. |
| Titanium | Strongest carbide former. Added to stainless steel to prevent precipitation of chromium carbide. |
| Silicon | Removes oxygen in steel making. Improves toughness. Increases hardness ability |
| Boron | Increases hardenability. Produces fine grain size. |
| Aluminum | Forms nitride in nitriding steels. Produces fine grain size in casting. Removes oxygen in steel melting. |
| Cobalt | Increases heat and wear resistance. |
| Tungsten | Increases hardness at elevated temperatures. Refines grain size. |
Ceramic lined pipe is made through self-propagating high-temperature synthesis (SHS) technique.
Cast basalt lined steel pipe is composed by lined with cast basalt pipe, outside steel pipe and cement mortar filling between the two layers.
Ceramic tile lined pipes have very uniform coating of specially formulated ceramic material that is affixed to the inner of the pipe.
The material of the rare earth alloy wear-resistant pipe is ZG40CrMnMoNiSiRe, which is also the grade of rare earth alloy steel.
Tubes Erosion Shields are used to protect boiler tubing from the highly erosive effects of high temperatures and pressures thereby greatly extending tube life.
The ASTM A213 T91 seamless tubes are primarily used for boiler, superheater, and heat-exchanger.
When you partner with Sunny Steel, you can stop worrying about meeting deadlines thanks to our responsive and timely service. You'll also say goodbye to unnecessary shopping around. Instead, you'll get white glove service from an expert who understands your needs and can get you the materials you need quickly.
