Expertise Ensures Safety: Scientific Selection of 20Cr1Mo1VTiB Main Steam Valve Stud Bolts

The Emergency Call: A Race Against Failure

We received an urgent call from a power plant specialist: 'A double-end stud on our Unit 2 Main Steam Valve has fractured during operation. We need a replacement immediately. Can you supply them fast?' We responded instantly, and after understanding the situation, we proactively offered: 'We can not only supply them quickly, but we can also ensure the new studs won't repeat the same mistake.'

The analysis revealed the root issue: although the failed stud was specified as 20Cr1Mo1VTiB and met basic elemental and stress requirements, the metallographic structure showed brittle Martensite instead of the required tempered Sorbitic structure. This is the classic, detrimental consequence of a small workshop that "only measures and skips heat treatment."

I. The "Low-Price Trap" of Small Workshops: A Skipped Step, a Decade of Risk

Many non-standard manufacturers on the market rely solely on measuring the dimensions of an old part, using common materials, and cutting corners—often omitting the crucial high-temperature tempering process. These "counterfeit" parts may seem cheap, but they harbor fatal defects:

The "Three-No" Risks of Substandard Suppliers:

• No Heat Treatment Control: Quenching without proper tempering leaves a coarse Martensite structure. The hardness is artificially high but the toughness is extremely poor, leading to severe lack of impact resistance and high susceptibility to brittle fracture.
• No Process Record: There are no records of the heat treatment curve, no Magnetic Particle Testing (PT) reports, and no metallographic data. The quality status is untraceable, relying entirely on a risky "experience" basis.
• Rough Machining: Threads are cut using common lathes, leaving visible tool marks, and the radius at the thread root transition is insufficient. This creates dangerous stress concentration points, which become the primary sources for fatigue crack initiation.

When dealing with high-temperature, high-pressure critical components for steam turbines, our company adheres rigidly to a philosophy of "Standard First, Process Controlled, Result Traceable." Our high-temperature fasteners not only meet basic standards but comprehensively satisfy rigorous industry-specific requirements:

II. Our Scientific Selection: Precision Manufacturing of 20Cr1Mo1VTiB Studs

III. Conclusion: Choosing Professionalism is Choosing Long-Term Peace of Mind

We have immediately initiated the emergency production process for the power plant and will complete inspection, packaging, and delivery in the shortest possible time. This is not just a simple stud; it is a lifeline safeguarding the unit's safety.

By choosing our products, you are selecting a triple guarantee: National Standards, Industry Specifications, and Corporate Responsibility. We ensure that every tightening operation can withstand the dual test of time and extreme temperature.