Шестигранный болт UNS S32550

QS: UNS S32550 Hex Bolt

Наименование: Болт с шестигранной головкой UNS S32550 Стандарт: UNS, ANSI, DIN, ASTM Материал: S32550 Размер: от M8 до M30 Длина: от 30 до 1000 мм Марка: A Класс: 12.9 Применение: морское машиностроение, химическая и нефтяная промышленность, опреснение и очистка воды, энергетика, пищевая и фармацевтическая промышленность

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Шестигранный болт UNS S32550 is manufactured from high-strength duplex stainless steel S32550 (UNS standard), compliant with international standards such as ASTM, ANSI, and DIN. Available in sizes ranging from M8 to M30 and lengths of 30–1000 mm, it meets performance Class 12.9. With exceptional corrosion resistance (especially against chloride stress corrosion) and mechanical strength, it is designed for demanding environments and widely used in marine engineering, petrochemical energy, seawater desalination, and food/pharmaceutical industries, making it the ideal choice for durability and safety.

Why Choose Шестигранный болт UNS S32550?
Шестигранный болт UNS S32550 offers significant advantages in harsh industrial environments due to its unique duplex stainless steel structure and optimized alloy composition, outperforming conventional austenitic stainless steels (e.g., 316L) in lifespan, safety, and lightweight design.

(1) Extended Lifespan: Шестигранный болт UNS S32550 Provides 3–5x Better Chloride Corrosion Resistance
① Material Science Comparison
- Limitations of 316L Bolts:
- 316L (UNS S31603) is austenitic stainless steel with a PREN of only 25–28, showing rust in salt spray environments within 200–500 hours.

- Breakthrough of Шестигранный болт UNS S32550:
- PREN exceeds 40, and its duplex structure blocks corrosion crack propagation.

② Test Data
- Salt Spray Test: UNS S32550 shows no red rust after 1,000 hours, far surpassing 316L.
- Case Study: Шестигранный болт UNS S32550 used in offshore wind turbine towers remain corrosion-free after 8 years.

Conclusion: UNS S32550 lasts 3–5 times longer than 316L in chloride-rich environments.

(2) Enhanced Safety: Шестигранный болт UNS S32550 Complies with NACE MR0175 Certification
① Oil & Gas Requirements
- Bolts in acidic environments are prone to hydrogen embrittlement and fracture.

② Шестигранный болт UNS S32550 Solution:
- Hardness HRC < 38; duplex structure inhibits hydrogen diffusion.
- Tested KISSC ≥ 30 MPa√m, meeting API 6A standards.

Industry Application: Widely used in high-risk applications like subsea Christmas trees.

(3) Lightweight Design: Шестигранный болт UNS S32550 Enables 60% Weight Reduction
① Strength Comparison
- 316L tensile strength: 515 MPa vs. UNS S32550: 1,220 MPa.

② Weight Reduction Case
- Under the same load, Шестигранный болт UNS S32550 reduces weight by 60%, improving sealing performance.

Summary: The Unmatched Advantages of Шестигранный болт UNS S32550

Comparison	316L Bolt	Шестигранный болт UNS S32550
Corrosion Resistance	200–500 hours salt spray life	1,000+ hours lifespan
H₂S Resistance	Not suitable for sour service	NACE MR0175 certified
Strength	515 MPa	1,220 MPa (Class 12.9)

Choosing Шестигранный болт UNS S32550 ensures longer service life, higher safety, and lower total lifecycle costs.