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ASTM A106 Grade C Seamless carbon steel Pipe represents the highest strength option within the A106 specification family, delivering 40,000 psi minimum yield strength for demanding high-temperature and high-pressure applications. While Grade B remains the industry workhorse for standard process piping, Grade C provides the enhanced strength necessary for heavy-wall installations, higher design pressures, and critical service conditions where additional safety margins are required.
Key Features:
1) No weld seam ensures uniform strength and integrity
2) Reliable performance up to 427°C (800°F)
3) Suitable for heavy-wall applications requiring greater strength
4) Compatible with ASME B31.1 (power piping) and B31.3 (process piping)
ASTM A106 Chemical Composition & Mechanical Property:
Chemical Composition | |||
Chemical Composition, % | Grade A | Grade B | Grade C |
C, max | 0.25 | 0.3 | 0.35 |
Mn | 0.27-0.93 | 0.29-1.06 | 0.29-1.06 |
P, max | 0.035 | 0.035 | 0.035 |
S, max | 0.035 | 0.035 | 0.035 |
Si, min | 0.10 | 0.10 | 0.10 |
Cr, max | 0.40 | 0.40 | 0.40 |
Cu, max | 0.40 | 0.40 | 0.40 |
Mo, max | 0.15 | 0.15 | 0.15 |
Ni, max | 0.40 | 0.40 | 0.40 |
V, max | 0.08 | 0.08 | 0.08 |
Tensile Requirements | ||
Grade | Yield Strength (min) | Tensile Strength (min) |
Grade A | 205 (30,000) | 330 (48,000) |
Grade B | 240 (35,000) | 415 (60,000) |
Grade C | 275 (40,000) | 485 (70,000) |
General information:
Standard: ASTM A106
Grade: A, B, C
Seamless: OD: 21.3-609.6mm; WT: 2-50mm; L: SRL / DRL / Cut to length
1) Beveled / Butt welded, the angle of the bevel shall be 30° with a tolerance of +5° 0°, and the width of the root face of the bevel shall be 1 .6 mm (0.063 in.), with a tolerance of ± 0.8 mm (0.031 in).
2) Plain or straight ends.
3) Threaded ends according to API Spec. 5B.
Available Coating: Bared, black painted (mill varnish), anti-corrosion coating, or metallic cladding.
Package: Hexagonal bundled with steel strips if pipe with OD≤219.08mm, loose packing if the pipe OD＞219.08mm, each bundle will not exceed 3tons.
Shipment: Land transportation by truck or train, sea transportation by container shipment or bulk vessel.
Hebei K-steel Pipe Industry Our advantage:
Flexible Project Customization
We provide tailored manufacturing solutions to meet diverse project requirements, including customized outer diameter, wall thickness, and length specifications. In addition, we offer precision end preparation and a full range of anti-corrosion coating options to ensure optimal performance in various operating environments. This flexibility enables us to deliver line pipe solutions that align seamlessly with your technical and application needs.
Fast & Reliable Lead Time
With strong mill partnerships and readily available inventory resources, we are able to shorten production cycles and respond quickly to urgent project demands. Our integrated supply network ensures stable material availability, efficient scheduling, and on-time delivery — helping clients keep their projects on track without delay.
Advanced Technical & Quality Assurance
Equipped with our own metallurgical laboratories and supported by trusted third-party inspection agencies, we ensure every line pipe meets international standards and project specifications. Comprehensive testing and verification guarantee consistent mechanical properties, chemical composition, and coating integrity, providing clients with reliable, high-quality pipeline solutions.
Rapid Delivery & Complete Logistics
Leveraging fast supply capabilities and a well-established logistics network, we ensure timely delivery of line pipes to any project location. Our streamlined transportation and warehousing system minimize lead time, helping clients maintain smooth operations and meet critical project schedules.
