ASME SA-210 Grade B Seamless Medium-Carbon Boiler & Superheater Tube
ASME SA210 Grade B Boiler Pipe | Seamless Carbon Steel Tube for Superheaters
Comprehensive data sheet for ASME SA210 Grade B seamless medium-carbon steel boiler and superheater tubes. Includes chemical, mechanical, thermal properties and equivalent standards.
Hot rolling followed by cold drawing or hot finishing; normalizing heat treatment as required.
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ASME SA-210 Grade B Seamless Medium-Carbon Boiler & Superheater Tube Introduction
ASME SA210 Grade B is a seamless medium-carbon steel tube primarily used for boiler and superheater applications. It complies with the ASME SA-210/SA-210M specification. This material offers excellent combination of strength, ductility, and weldability, suitable for high-temperature service up to approximately 450 °C (840 °F). Typical delivery condition is either hot-finished or cold-drawn, followed by a normalizing heat treatment. Key characteristics include:
- Moderate carbon content ensures good tensile strength while retaining formability.
- Minimum silicon content provides adequate deoxidation, enhancing overall steel cleanliness.
- Controlled phosphorus and sulfur levels reduce hot-cracking sensitivity during welding.
- Widely used in power generation, petrochemical, and industrial heating systems.
ASME SA-210 Grade B Seamless Medium-Carbon Boiler & Superheater Tube Chemical Composition
Chemical requirements according to ASME SA-210/SA-210M for Grade B. The composition is designed to balance strength and ductility for elevated-temperature service. Residual elements are limited to avoid detrimental effects on steel properties.
| Element | Standard Value (%) | Remarks |
|---|---|---|
| Carbon (C) | ≤ 0.30 | Provides strength; max limited to maintain weldability. |
| Manganese (Mn) | 0.30 – 0.60 | Contributes to toughness and hardenability. |
| Silicon (Si) | ≥ 0.10 | Required for deoxidation, improves strength. |
| Phosphorus (P) | ≤ 0.035 | Controlled low to avoid brittleness. |
| Sulfur (S) | ≤ 0.035 | Controlled low to prevent hot cracking. |
ASME SA-210 Grade B Seamless Medium-Carbon Boiler & Superheater Tube Thermal and Electrical Physical Properties
Typical physical properties for medium-carbon steel in the normalized condition at ambient temperatures unless stated otherwise. These values are provided as engineering approximations and may vary slightly with specific heat treatment.
| Property | Typical Value | Unit | Test Condition / Temperature |
|---|---|---|---|
| Density (ρ) | 7.85 | g/cm³ | Room temperature |
| Elastic Modulus (E) | 205 | GPa | Room temperature |
| Shear Modulus (G) | 80 | GPa | Room temperature, calculated |
| Poisson's Ratio (ν) | 0.29 | – | Room temperature |
| Thermal Expansion Coefficient (α) | 11.5 × 10⁻⁶ | °C⁻¹ | 20 – 100 °C |
| Thermal Expansion Coefficient (α) | 12.5 × 10⁻⁶ | °C⁻¹ | 20 – 200 °C |
| Thermal Expansion Coefficient (α) | 13.5 × 10⁻⁶ | °C⁻¹ | 20 – 400 °C |
| Thermal Conductivity (λ) | 51.9 | W/(m·K) | Room temperature (typical for 0.20% C steel) |
| Specific Heat Capacity (cp) | 0.486 | kJ/(kg·K) | 20 – 100 °C |
| Electrical Resistivity (ρ_e) | 0.21 | µΩ·m | Room temperature |
ASME SA-210 Grade B Seamless Medium-Carbon Boiler & Superheater Tube Mechanical Properties
Tensile and hardness properties according to ASME SA-210. Values represent minimum requirements unless otherwise noted. Testing is performed at room temperature on longitudinal specimens taken from finished tubes.
| Property | Standard Required Value | Unit | Test Condition / Remarks |
|---|---|---|---|
| Tensile Strength (Rm) | ≥ 415 | MPa | Room temperature, longitudinal specimen |
| Tensile Strength (Rm) | ≥ 60 | ksi | Room temperature, longitudinal specimen |
| Yield Strength (ReH, 0.2% offset) | ≥ 240 | MPa | Room temperature, longitudinal specimen |
| Yield Strength (ReH, 0.2% offset) | ≥ 35 | ksi | Room temperature, longitudinal specimen |
| Elongation (A, 50 mm or 2 in.) | ≥ 30 | % | For wall thickness ≥ 5/16 in. (7.94 mm); for thinner walls consult specification. |
| Elongation (A, 50 mm or 2 in.) | ≥ 24 | % | For wall thickness < 5/16 in. (7.94 mm) typical min. |
| Hardness (Brinell HBW) | ≤ 179 | – | Typical value for hot-finished and normalized condition; not mandatory. |
| Bend Test (180°) | Bend diameter = 1.5 × tube O.D. or as agreed | – | For ductility verification; no cracking allowed. |
ASME SA-210 Grade B Seamless Medium-Carbon Boiler & Superheater Tube Directly Equivalent Material Standards and Replaceable Grades
| Country/Region | Standard | Grade | Remarks |
|---|---|---|---|
| United States | ASTM A210/A210M | Grade B | Identical to ASME SA210 Grade B; same chemical and mechanical requirements. |
| Japan | JIS G3461 | STB 410 | Similar carbon-manganese steel for boiler tubes; tensile strength ≥410 MPa. |
| Germany | DIN 17175 | St45.8 | Seamless steel tube with minimum tensile strength 440–550 MPa; similar application scope. |
| China | GB/T 5310 | 20G | High-quality carbon steel for boiler tubes; closely matches SA210 grade B performance. |
ASME SA-210 Grade B Seamless Medium-Carbon Boiler & Superheater Tube Application Introduction
ASME SA210 Grade B is a versatile carbon steel tube designed for high-temperature, moderate-pressure service. It can be used in a variety of industrial heating and heat recovery systems owing to its balance of strength, ductility, and fabricability.
- Key Attributes: Good weldability, formability, and thermal conductivity.
- Processing: Suitable for bending, expanding, flanging, and similar forming operations.
- Temperature Limit: Typically employed up to 450 °C (840 °F), beyond which oxidation and strength loss may become significant.
Product Applications: Waterwall panels in boilers, Superheater and reheater tube bundles, Economizer coils, Heat exchanger tubing, Steam piping for medium-pressure applications, Process heater tubes in refineries
Processed into products: Boiler tubes (water tubes and fire tubes), Superheater and reheater tube sections, Economizer tubes, Air preheater tubes, Tube-to-header connections, Expanded tube-to-tubesheet joints
Application industries: Power Generation (coal-fired, gas-fired, and waste-to-energy plants), Petrochemical and Refinery, Industrial Boiler Manufacturing, Chemical Processing, Heat Recovery Steam Generators (HRSG)
ASME SA-210 Grade B Seamless Medium-Carbon Boiler & Superheater Tube Similar or Comparable Substitute Materials
| Country/Region | Standard | Grade | Remarks |
|---|---|---|---|
| United States | ASTM A192/A192M | A192 | Seamless carbon steel boiler tubes for high-pressure service; lower carbon (≤0.25%), slightly lower strength. |
| United States | ASTM A106/A106M | Grade B | Seamless carbon steel pipe for high-temperature service; wider carbon range and higher strength (415 MPa min). |
| Japan | JIS G3456 | STPT 410 | Carbon steel pipes for high-temperature service; comparable strength but different product form requirements. |
| Germany | EN 10216-2 | P235GH | Non-alloy steel for pressure purposes with lower strength (360-500 MPa Rm); used in similar environments. |
Notes:
Material Certification: All tubes must be supplied with certificates of compliance to ASME SA-210. Mill test reports include heat analysis, mechanical tests, and hydrostatic or non-destructive electric tests as specified. Weldability: Grade B can be welded by conventional arc welding processes (GTAW, SMAW, GMAW) using low-hydrogen fillers; preheat and post-weld heat treatment are recommended for thicker sections. Surface Condition: Free from scale and other defects that could compromise service performance. Normalizing: Hot-finished tubes are customarily normalized at 860–900 °C to achieve uniform microstructure.
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