Direct supply to the Seoul Capital Area, Incheon Free Economic Zone (IFEZ), and Gyeonggi industrial clusters. Manufactured in full compliance with ASME, ASTM, DIN EN, and ISO requirements.
Engineered for high-risk corrosive environments where standard 300-series stainless steels suffer rapid pitting, stress corrosion cracking (SCC), and crevice corrosion.
Hastelloy C276 is among the select few alloys resistant to wet chlorine gas, hypochlorite, and chlorine dioxide solutions. Its precisely controlled molybdenum (15.0–17.0%) and chromium (14.5–16.5%) contents eliminate localized pitting in severe halide media, making it indispensable for chemical processing headers.
With tungsten (3.0–4.5%) additions and ultra-low carbon (≤0.010%) and silicon (≤0.08%) matrices, our C276 hex bolts suppress the formation of grain-boundary precipitates in the weld heat-affected zone (HAZ), securing corrosion resistance in as-welded flanged configurations.
Delivering a minimum tensile strength of 690 MPa and yield strength of 283 MPa with an elongation of 40%, these hex bolts maintain mechanical stability under cyclic thermal loading, severe torque settings, and pressures up to ASME Class 2500 and API 10,000 PSI service.
| Alloy Grade | UNS / W.Nr. | Ni (%) | Mo (%) | Cr (%) | Fe (%) | W (%) | C (%) |
|---|---|---|---|---|---|---|---|
| Hastelloy C276 | UNS N10276 / 2.4819 | Balance (approx. 57) | 15.0 – 17.0 | 14.5 – 16.5 | 4.0 – 7.0 | 3.0 – 4.5 | ≤ 0.010 |
| Inconel 625 | UNS N06625 / 2.4856 | ≥ 58.0 | 8.0 – 10.0 | 20.0 – 23.0 | ≤ 5.0 | — | ≤ 0.10 |
| Super Duplex 2507 | UNS S32750 / 1.4410 | 6.0 – 8.0 | 3.0 – 5.0 | 24.0 – 26.0 | Balance | — | ≤ 0.030 |
Supplying the capital's engineering firms, high-tech semiconductor fabs, and maritime export terminals across the Greater Seoul metropolitan network.
Critical in wafer etching systems in Gyeonggi-do (Pyeongtaek & Hwaseong hubs). Hastelloy C276 bolts and PVDF fittings safeguard pipelines against volatile hydrofluoric, hydrochloric, and nitric acid fumes without media contamination.
Korean shipbuilders along Incheon and southern yards depend on C276 bolting to assemble cryogenic and desulfurization scrubber equipment, preventing stress corrosion cracking in warm, acidic marine seawater exhaust streams.
Seoul-headquartered biopharma manufacturers in Songdo rely on our high-nickel and electro-polished austenitic split flanges for CIP (Clean-In-Place) and SIP (Steam-In-Place) lines handling aggressive sterilizing chemicals.
Combined-cycle thermal power plants in the Incheon-Seoul grid utilize C276 stud and hex bolts within scrubbers and duct dampers exposed to sulfuric acid condensates and high temperatures up to 450°C.
The South Korean engineering, procurement, and construction (EPC) industry is undergoing a structural transition driven by mega-scale fabs and clean energy infrastructure.
Korea's Carbon Neutrality Roadmap has stimulated heavy investments in ammonia cracking and hydrogen transport systems across Seoul, Ulsan, and Yeosu. Because molecular hydrogen causes embrittlement in standard carbon steels, EPC specifications require nickel-base alloys like Hastelloy C276 and Inconel 625 for flanged joints operating at pressures above Class 600.
Procurement teams in Seoul have moved toward mandatory EN 10204 3.1 certification with direct heat-number micro-stamping. As Korean fabricators win overseas bids in the Middle East and Southeast Asia, components must carry pre-audited international accreditations (IBR, EIL, and ISO 9001) to eliminate compliance rejections at site.
Supply chain shocks have altered purchasing behavior among Seoul-based tier-one contractors. Rather than enduring 16-to-20-week mill deliveries for rare alloys, EPC procurement managers are establishing direct vendor-managed inventory agreements with established manufacturers capable of express air-freighting critical fasteners directly to Incheon International Airport.
Decades of manufacturing discipline, recognized accreditation, and end-to-end metallurgical traceability.
Certified as a Government of India Recognised Export House, operating an audited ISO 9001 quality system with approvals from Engineers India Limited (EIL) and Indian Boiler Regulations (IBR) for critical industrial service.
Every single batch of Hastelloy C276 hex bolts, studs, and flanges carries laser-etched or stamped heat numbers corresponding to mill test certificates detailing chemical compositions, mechanical yield tests, and PMI scans.
We forge our components exclusively using verified melts originating from prime tier-one mills in India, South Korea, and Japan. This safeguards against brittle failure and maintains uniform metallurgy during machining.
Our dedicated export logistics team ensures prompt dispatch via air freight to Incheon International Airport (ICN) or ocean transport to Busan and Incheon Ports, with export documentation including Form A / COO and third-party inspection.
Technical, logistical, and commercial inquiries addressed by our metallurgical engineering team.
Our engineering sales desk reviews project datasheets, MTO lists, and drawings to return comprehensive commercial offers backed by mill certification.
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