L80-9Cr Low Alloy Steel OCTG Product Introduction‌

‌1. Material Overview‌
L80-9Cr is a cost-effective chromium-modified low alloy steel designed for oil country tubular goods applications. This material bridges the performance gap between conventional carbon steels and higher-grade 13Cr alloys, offering improved corrosion resistance while maintaining economic viability.

‌2. Key Specifications‌

• ‌Chemical Composition‌: Contains 8-10% chromium with controlled carbon content (0.15-0.25%) and minor alloying elements
• ‌Mechanical Properties‌: Meets API 5CT L80 grade requirements with minimum yield strength of 552 MPa (80 ksi) and maximum hardness of 23 HRC
• ‌Corrosion Resistance‌: Provides 2-3 times better CO₂ corrosion resistance than standard carbon steels

‌3. Performance Characteristics‌

• Suitable for sweet service applications with moderate CO₂ partial pressures
• Operating temperature range from -18°C to 121°C
• Better sulfide stress cracking resistance than conventional carbon steels

‌4. Primary Applications‌

• Production tubing in sweet oil wells with moderate CO₂ content
• Casing strings in mildly corrosive environments
• Economical alternative where 13Cr alloys are not justified

‌5. Manufacturing Standards‌

• Manufactured to API 5CT specifications
• Available in standard OCTG sizes
• Typically supplied in quenched and tempered condition