Home / Products / Stainless Steel Pipe / ASTM A556 Seamless Cold Drawn Heater Tube Feedwater Heater Grades A2 B2 C2
Quality ASTM A556 Seamless Cold Drawn Heater Tube Feedwater Heater Grades A2 B2 C2 factory
Quality ASTM A556 Seamless Cold Drawn Heater Tube Feedwater Heater Grades A2 B2 C2 factory

ASTM A556 Seamless Cold Drawn Heater Tube Feedwater Heater Grades A2 B2 C2

Basic Properties
Place of Origin: MADE IN CHAINA
Brand Name: Baosteel，TISCO
Certification: EN 10204 Type 3.1 / 3.2 available
Model Number: 201 / 202 / 301 / 302 / 303 / 304 / 304L / 305 / 309S / 310S / 316 / 316L / 317 / 317L / 321 / 347 / 409L / 410 / 420 / 430 / 440C / 2205 / 2507
Trading Properties
Minimum Order Quantity: 100kg
Price: Negotiable (Request a Quote)
Payment Terms: T/T，D/P，D/A，Western Union，PayPal
Supply Ability: 10000tons
Tags

Molybdenum Alloy Stainless Steel Pipe

Stainless Steel Pipe Chloride Resistance

Seamless Heater Tube
Product Summary
ASTM A556 / A556M is the standard specification for seamless cold-drawn carbon steel tubes used primarily in tubular feedwater heaters. These tubes are manufactured with minimum wall thickness and can be supplied as straight lengths or bent into U-tubes as specified by the customer.ASTM A556 ...

Product Details

Highlight:

Seamless Heater Tube

,

Cold Drawn Heater Tube

,

ASTM A556 Heater Tube
Country Of Origin: MADE IN CHAINA
Brand: Baosteel，TISCO
Certifications: ISO/EN 10204 Type 3.1 / 3.2 Available
Grade: 201 / 202 / 301 / 302 / 303 / 304 / 304L / 305 / 309S / 310S / 316 / 316L / 317 / 317L / 321 / 347 / 409L / 410 / 420 / 430 / 440C / 2205 / 2507 / 630 (17-4PH)
MOQ: 100kg
Price: Negotiable (Request A Quote)
Packaging: Wooden Case / Wooden Pallet / Steel Frame / Carton / Woven Bag
Delivery Time: 15-25days
Payment Terms: T/T，D/P，D/A，Western Union，PayPal
Supply Capacity: 10000tons
Product Description

ASTM A556 / A556M is the standard specification for seamless cold-drawn carbon steel tubes used primarily in tubular feedwater heaters. These tubes are manufactured with minimum wall thickness and can be supplied as straight lengths or bent into U-tubes as specified by the customer.
ASTM A556 Seamless Heater Tubes are critical components in power generation facilities and boiler systems, where they serve to preheat feedwater before it enters the boiler drum. By recovering waste heat from turbine extraction steam, these tubes significantly improve the thermal efficiency of the entire power plant.
The cold-drawn seamless manufacturing process ensures precise dimensional tolerances, a smooth internal surface, and uniform grain structure, making ASTM A556 tubes the industry standard for high-pressure feedwater heater applications.
Key Features:

  • Seamless cold-drawn construction
  • Available in straight lengths or U-bend configurations
  • Minimum wall thickness design for optimal heat transfer
  • Excellent ductility for tube-to-tubesheet rolling
  • Three strength grades: A2, B2, and C2
  • Non-destructive testing per full cross-section

Available Grades: A2, B2, C2 (Grade C2 offers the highest strength)

Product Specifications
ParameterDetails
StandardASTM A556 / A556M (also ASME SA 556)
Product TypeSeamless Cold-Drawn Carbon Steel Tube
Primary ApplicationTubular Feedwater Heaters, Boilers
Outer Diameter Range5/8″ – 1-1/4″ (15.9 mm – 31.8 mm)
Minimum Wall Thickness≥ 0.045″ (≥ 1.1 mm)
Length3m – 12m (custom lengths available)
Available GradesA2, B2, C2
Delivery ConditionAs-drawn (NBK), Bright Annealed, U-bent
End FinishPlain ends, Beveled ends, U-bends

ASTM A556 Seamless Heater Tubes Manufacturing Process:
The tubes are manufactured using a seamless process followed by cold drawing to achieve precise dimensions and improved mechanical properties.
Heat Treatment:
After the final cold-drawn pass, tubes are heat-treated at 1200°F (640°C) or higher to ensure adequate ductility for rolling into tube sheets and to meet specified mechanical property requirements.

Chemical Composition (by Grade)
ElementGrade A2 (%)Grade B2 (%)Grade C2 (%)
Carbon (C), max0.180.270.30
Manganese (Mn)0.27 – 0.630.29 – 0.930.27 – 1.06
Phosphorus (P), max0.0350.0350.035
Sulfur (S), max0.0350.0350.035
Silicon (Si), min0.100.100.10

Note: Silicon is specified as a minimum requirement for all grades to ensure proper deoxidation and steel quality.

Mechanical Properties
PropertyGrade A2Grade B2Grade C2
Tensile Strength, min320 MPa (47 ksi)410 MPa (60 ksi)480 MPa (70 ksi)
Yield Strength, min180 MPa (26 ksi)260 MPa (38 ksi)280 MPa (40 ksi)
Elongation (2″ or 50mm), min %35%35%35%
Hardness (HRB)72 typical79 min89 max

Physical Properties (Typical for Carbon Steel):

PropertyValue
Density7.8 – 7.9 g/cm³
Modulus of Elasticity200 – 215 GPa
Maximum Service Temperature500°C (932°F)
Melting Point1480 – 1526°C
Thermal Conductivity25 – 93 W/(m·K)
U-Bend Tubes

ASTM A556 tubes are frequently supplied in U-bend configurations for feedwater heater applications. When U-bends are specified:

  • Tubes shall be bent to the specified radius without visible flattening or wrinkling
  • Stress relief annealing is required for U-bends, performed at 1100 – 1200°F (585 – 640°C)
  • The bending process shall not reduce the wall thickness below the minimum requirement

Advantages of U-tube design:

  • Allows for free thermal expansion of tubes
  • Simplifies tube sheet design (only one tube sheet required)
  • Facilitates easier cleaning and maintenance
  • Reduces overall heat exchanger footprint
Comparison of ASTM A556 Grades
GradeStrength LevelTypical Applications
A2Lowest (47 ksi UTS)Low-pressure feedwater heaters, less demanding service
B2Intermediate (60 ksi UTS)Standard duty feedwater heaters, most commonly specified
C2Highest (70 ksi UTS)High-pressure feedwater heaters, severe service conditions

Note: Grades B2 and C2 are the most commonly specified for power plant feedwater heater applications.

Contact Us

For ASTM A556 Seamless Heater Tubes inquiries, quotes, or technical support regarding ASTM A556 feedwater heater tubes, please contact us now

Related Products
  • Quality Precision 301 304 316 430 Cold Rolled Stainless Steel Strip 2B BA No.4 Finish factory

    Precision 301 304 316 430 Cold Rolled Stainless Steel Strip 2B BA No.4 Finish
    Precision cold rolled stainless steel strip is a narrow, thin-gauge stainless steel product manufactured to significantly tighter thickness and width tolerances than standard cold-rolled sheet. Unlike standard sheet (typically 1000mm or 1219mm wide), precision strip is produced in narrow widths — usually less than 600mm — and thin gauges from 0.05mm up to 3.0mm. The key differentiator is the tolerance : the precision strip holds thickness variations to as low as ±0.005mm,
  • Quality High Precision 304 Stainless Steel Seamless Pipe Cold Rolled Corrosion Resistance factory

    High Precision 304 Stainless Steel Seamless Pipe Cold Rolled Corrosion Resistance
    304 Stainless Steel Seamless Pipe The 304 stainless steel seamless pipe is a globally recognized standard grade in the stainless steel family. With a chemical composition of 18% chromium and 8% nickel, it offers excellent corrosion resistance, high toughness, and outstanding formability. Manufactured using precision seamless cold-rolling technology, this pipe delivers a superior surface finish, tight dimensional tolerances, and consistent mechanical properties — making it the
  • Quality UNS N06022 Hastelloy C-22 Alloy Corrosion Resistant ASTM B622 factory

    UNS N06022 Hastelloy C-22 Alloy Corrosion Resistant ASTM B622
    UNS N06022 is a nickel-chromium-molybdenum alloy renowned for its exceptional resistance to both oxidizing and reducing corrosive media. With a higher chromium content than C-276, plus controlled additions of tungsten, this alloy offers superior resistance to pitting, crevice corrosion, and stress-corrosion cracking in aggressive environments. UNS N06022 provides outstanding performance in wet chlorine, hydrochloric acid, sulfuric acid, and mixed acid solutions where many
  • Quality Austenitic Corrosion Resistant Hastelloy C-22 Nickel Alloy For Harsh Chemical Processing factory

    Austenitic Corrosion Resistant Hastelloy C-22 Nickel Alloy For Harsh Chemical Processing
    Hastelloy C-22: Ultimate Corrosion-Resistant Nickel Alloy Hastelloy C-22 is a fully austenitic, advanced corrosion-resistant nickel-chromium-molybdenum-tungsten alloy. It offers outstanding resistance to both uniform corrosion in oxidizing media and localized attack (pitting, crevice corrosion) in reducing environments. Unlike standard alloys, C-22 provides exceptional resistance to stress corrosion cracking (SCC), intergranular attack, and weld heat-affected zone (HAZ)

Send An Inquiry