Q125 HC Steel Grade Specifications

Q125 HC is a high-strength steel grade designed for applications within the oil and gas industry where enhanced collapse resistance is required. Manufactured to meet the stringent API 5CT specifications, Q125 HC offers superior performance characteristics that exceed the minimum standards for standard API Q125.

Mechanical Properties

• Minimum Yield Strength: 125,000 psi
• Maximum Yield Strength: 150,000 psi
• Minimum Tensile Strength: 135,000 psi
• Maximum Hardness: No limit specified – hardness variation requirement

These mechanical properties equip Q125 HC steel with the necessary strength and ductility to withstand the pressures and stresses encountered in demanding downhole operations.

Collapse Resistance

The Q125 HC steel grade is recognized for its demonstrated collapse resistance that surpasses the minimum values mandated for standard API Q125. This makes it particularly suitable for use in high-collapse risk environments, such as deep and deviated wells.

Manufacturing Standards

Adherence to API specification 5CT ensures that Q125 HC is manufactured to a high standard of quality and reliability. This specification covers critical aspects such as dimensions, tolerances, marking, testing, and inspection of casing and tubing.

References

• American Petroleum Institute. (n.d.). API Specification 5CT - Specification for Casing and Tubing. Retrieved from https://www.api.org/products-and-services/standards/specifications/5ct

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