ASTM A178 Grade A, Grade B, Grade C Superheater Tubes: ERW Carbon-Manganese Precision Steel Tube
Superheater tubes are critical components in power plants and industrial boilers, designed to withstand high temperatures and pressures. ASTM A178 is a standard specification for electric-resistance-welded (ERW) carbon-manganese steel tubes, specifically intended for use in boiler and superheater systems. This article delves into the material specifications, key features, chemical composition, mechanical properties, steel grades, applications, and possible alternative grades for ASTM A178 Grade A, Grade B, and Grade C superheater tubes.
Material Specification
ASTM A178 specifies the requirements for ERW carbon-manganese steel tubes used in high-temperature applications. These tubes are manufactured using a precision welding process to ensure uniformity and strength. The standard covers three grades: A, B, and C, each with distinct chemical and mechanical properties tailored to specific applications.
Key Features
- High Temperature Resistance: Designed to operate efficiently under high-temperature conditions.
- Corrosion Resistance: Enhanced resistance to oxidation and corrosion, extending the lifespan of the tubes.
- Precision Manufacturing: ERW process ensures consistent wall thickness and diameter.
- Versatility: Suitable for various industrial applications, including power generation and petrochemical industries.
Chemical Composition
The chemical composition of ASTM A178 tubes varies by grade, as shown in the table below:
| Element | Grade A (%) | Grade B (%) | Grade C (%) |
| Carbon | 0.06 - 0.18 | 0.19 - 0.27 | 0.27 - 0.35 |
| Manganese | 0.27 - 0.63 | 0.82 - 1.06 | 1.06 - 1.35 |
| Phosphorus (max) | 0.035 | 0.035 | 0.035 |
| Sulfur (max) | 0.035 | 0.035 | 0.035 |
Mechanical Properties
The mechanical properties of ASTM A178 tubes are critical for ensuring performance under operational stresses. The table below outlines the properties for each grade:
| Property | Grade A | Grade B | Grade C |
| Tensile Strength (min, MPa) | 310 | 415 | 485 |
| Yield Strength (min, MPa) | 180 | 240 | 275 |
| Elongation (min, %) | 35 | 30 | 30 |
Steel Grade
ASTM A178 covers three grades of steel, each designed for specific applications:
- Grade A: Suitable for low-pressure applications where moderate strength is sufficient.
- Grade B: Offers a balance of strength and ductility, ideal for medium-pressure systems.
- Grade C: Provides high strength for high-pressure environments.
Application
ASTM A178 superheater tubes are widely used in:
- Power Plants: For steam generation and heat exchange systems.
- Industrial Boilers: In chemical and petrochemical industries.
- Heat Exchangers: Where high-temperature resistance is crucial.
Possible Alternative Grades
While ASTM A178 is a popular choice, alternative grades may be considered based on specific requirements:
- ASTM A192: Seamless carbon steel boiler tubes for high-pressure applications.
- ASTM A210: Medium-carbon steel tubes for boiler and superheater systems.
- ASTM A213: Alloy steel tubes for high-temperature service.
TORICH Group, an one-stop service provider of raw materials engaged in raw material production, R&D and
trade, has 30+ years of experience in the market, exported to 56 +countries, and won good reputation and
credibility among domestic and foreign customers.
The company's production plant covers an area of over 10,000 square meters, with an annual production
capacity of 50,000 tons of materials and a comprehensive trading and warehousing capacity of 100,000 tons, which can satisfy customers' personalized needs for raw materials in terms of diversity and timeliness.
The group holds shares in more than ten domestic production entities, whose main products include
seamless steel pipes ( carbon steel and stainless steel), welded pipes ( carbon steel and stainless steel), pipe fittings ( carbon steel and stainless steel), titanium (titanium tubes, titanium rods, titanium cakes, titanium plates, etc.), aluminum (aluminum tubes, aluminum rods, aluminum die casting, aluminum casting, CNC machining), and CNC deep processing of metal materials such as tubes, rods, and casting parts.
Over the past 30 years, the company has been gradually developing new technologies and materials to meet
the growing needs of customers and various diversified needs, exporting to more than 56 countries and still
increasing the number of exporting countries, aiming to help customers to solve the demand for raw materials, and to facilitate one-stop purchasing for customers.
Q: Are you trading company or manufacturer ?
A: manufacturer,also can do trading.
Q: How long is your delivery time?
A: Generally speaking,it is 10-15 days if the goods are in stock,or it is 30-40 days if the goods are not in stock, it is according to quantity.
Q: Do you provide samples? is it free or extra ?
A: Yes, we could offer the sample for free charge but need pay the cost of freight.
Q: What is your terms of payment ?
A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shippment.
If you have another question, pls feel free to contact with me.
|
|
ASTM A178 Grade C Superheater Tubes ERW Carbon-Manganese Precision Steel Tube For Superheater Images
|
