Surface Treatments
Certifications
- ISO 9001 - 2015 Certified
- PED 2014/68/EC
- NACE MR0175 / ISO 15156-2
- NORSOK M-650 Qualified
- API 6A Certified
- DFAR
- MERKBLATT AD 2000 W2/W7/W10
About TorqBolt and This Site
TorqBolt Private Limited is a precision fastener and industrial materials supplier headquartered in Mumbai, Maharashtra, India, with manufacturing and finishing operations in Rajkot, Gujarat. The company specialises in high-grade alloy fasteners and material stock for oil and gas, nuclear, power, marine, desalination, chemical, and refining industries. duplex2507.com is TorqBolt's dedicated technical reference and commercial enquiry portal for super duplex 2507 stainless steel (UNS S32750 / EN 1.4410).
The Company
TorqBolt operates an integrated supply model: stock holding at the Mumbai warehouse for fast-turnaround project supply, plus a Rajkot manufacturing facility for fastener machining, threading, surface finishing, packing and inspection. The company sources stock from licensed UNS S32750 producers worldwide, including Sandvik / Alleima (Sweden), Industeel ArcelorMittal (France and Belgium), and Outokumpu (Sweden and Finland), under their respective trade names SAF 2507, UR 52N+, and Avesta 2507. Mill stock is qualified to ASTM, EN, NORSOK and NACE specifications, with EN 10204 Type 3.1 mill test certificates as standard and Type 3.2 third-party-witnessed certification on request.
Quality Management and Compliance
TorqBolt operates an ISO 9001-certified quality management system, with documented procedures covering purchase, incoming inspection, stock control, manufacturing, in-process inspection, final inspection, despatch and customer complaint handling. The QMS supports the full traceability chain from mill heat through finished goods despatch, in line with the requirements of ASME, ASTM, NORSOK and NACE project specifications.
For specialist material qualification, TorqBolt holds NORSOK M-650 (Manufacturer Qualification) certification for super duplex production routes via its mill partners. NACE MR0175 / ISO 15156-3 sour-service compliance is supported on every super duplex order, with hardness, ferrite content, and PREN reported on the mill test certificate. For nuclear-class supplies, TorqBolt operates within the requirements of 10 CFR 50 Appendix B, ASME NQA-1, and customer-specific nuclear quality assurance programmes.
Industries Served
TorqBolt's super duplex 2507 supply has covered project requirements for:
- Oil and gas: Onshore and offshore platform piping, christmas trees, manifolds, jumpers, wellhead bolting, subsea control hardware
- Refining and petrochemical: Crude desalters, sour-water strippers, hydroprocessing reactor internals, FCC overhead systems
- Desalination: Multi-stage flash (MSF) brine heater tubing, multiple-effect distillation (MED) falling-film evaporators, RO high-pressure piping
- Marine and naval: Seawater piping, ballast systems, propeller shafts, deck hardware, firewater systems
- Power generation: Flue gas desulfurization (WFGD) absorbers, quenchers and outlet ducts
- Nuclear: Class 1, 2 and 3 piping bolting, valve trims and instrumentation hardware where chloride pitting resistance is required
- Chemical and pharma: Reactor vessels, agitators, pumps, valves and tanks for dilute HCl, H2SO4 and chloride-bearing media
- Pulp and paper: Bleach plant chlorine dioxide stage piping and tanks
Why a Dedicated Super Duplex 2507 Site
duplex2507.com exists because super duplex 2507 (UNS S32750) is a grade with substantial commercial and technical depth that warrants its own technical reference resource. The grade carries a dense web of overlapping designations (UNS S32750, EN 1.4410, X2CrNiMoN25-7-4, ASTM A182 F53, NORSOK M-630 D55 / D57), three principal mill trademarks (SAF 2507, UR 52N+, Avesta 2507), distinct chemistry and corrosion behaviour from its sister grades (Zeron 100, Ferralium 255, DP3W), and exacting requirements under NORSOK M-650, NACE MR0175 and ISO 15156-3 for sour service.
A single-grade reference site lets TorqBolt go deep on the chemistry, the mechanical properties, the heat treatment, the welding, the standards landscape and the application engineering for super duplex 2507, without the dilution that comes from covering many grades on one site. The site is a working reference for engineers, buyers, project specifiers and compliance officers, supported by TorqBolt's commercial supply capability for the Indian and international markets.
About the Content
Technical reference content on duplex2507.com is compiled by TorqBolt's QA-QC team from published international standards (ASTM, ISO, EN, NORSOK, NACE, API), mill datasheets from licensed UNS S32750 producers, and TorqBolt's commercial supply experience. The content is intended as general technical reference and is not a substitute for the original published standards or qualified metallurgical engineering review for specific project applications. Where a specific project decision turns on a metallurgical detail, always consult the original standard and a qualified engineer.
Mill trademarks (SAF 2507 of Sandvik / Alleima, UR 52N+ of Industeel ArcelorMittal, Avesta 2507 of Outokumpu, Zeron 100 of Rolled Alloys, Ferralium 255 of Langley Alloys, DP3W of Sumitomo / Nippon Steel) are the trademarks of their respective owners. Reference on this site is for technical comparison purposes only and does not imply endorsement by or affiliation with the trademark owners.
Contact
For super duplex 2507 enquiries, RFQs, technical questions or general company information:
TorqBolt Private Limited
Mumbai, Maharashtra, India
Email: info@torqbolt.com
Phone: +91-22-66157017
Web: torqbolt.com (parent site) and duplex2507.com (this site)
About Frequently Asked Questions
What does TorqBolt manufacture?
TorqBolt manufactures precision fasteners (bolts, nuts, studs, washers, threaded rod, socket head cap screws and related items) in high-grade alloy materials including super duplex 2507, duplex 2205, Zeron 100, Inconel 718, Inconel 625, Hastelloy C-276, Monel 400, Incoloy 825, and other corrosion-resistant alloys. Manufacturing is at the Rajkot facility; stock holding is at the Mumbai warehouse.
Where is TorqBolt located?
TorqBolt's head office and primary warehouse are in Mumbai, Maharashtra, India. The manufacturing and finishing facility is in Rajkot, Gujarat. The two locations operate as an integrated supply chain.
Is TorqBolt ISO 9001 certified?
Yes. TorqBolt operates an ISO 9001-certified quality management system covering purchase, inspection, stock control, manufacturing, despatch and customer complaint handling. The certification supports the full traceability chain from mill heat through finished goods despatch.
Does TorqBolt supply NORSOK M-650 qualified material?
Yes. TorqBolt sources super duplex 2507 from mill partners that hold NORSOK M-650 manufacturer qualification (QTR). The QTR certificate from the source mill is available to projects on request.
Does TorqBolt supply nuclear-class material?
Yes. TorqBolt supports nuclear-class supplies under 10 CFR 50 Appendix B, ASME NQA-1, and customer-specific nuclear QA programmes. Project requirements for nuclear-grade super duplex bolting and material can be discussed on a case-by-case basis.
How can I request a quotation?
Send an email to info@torqbolt.com with the material specification, sizes, quantity, certification requirement and delivery destination. Stock confirmation typically within 4 business hours; full RFQ pricing within 24 business hours.
Does TorqBolt offer technical support?
Yes. The TorqBolt QA-QC team supports material selection, NACE compliance assessment, NORSOK MDS interpretation, PREN calculation, and welding qualification questions for super duplex 2507. The technical pages on this site cover the principal selection and use questions; for project-specific support, contact info@torqbolt.com.
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