Standards
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
Incoloy 925 Bars (UNS N09925)
Round / hex / square / flat bar ASTM B805 — input stock for fastener + machined-component manufacture
Incoloy 925 bars (UNS N09925) are the workhorse mill product for the alloy, the input stock from which stud bolts, hex bolts, forgings, wellhead hangers, valve internals and machined components are manufactured. Per ASTM B805, bar is supplied as round (most common), hex (for nut blanks), square or flat cross-section, in the solution-annealed and aged condition. Round bar is hot-rolled or hot-forged for diameters above ~25 mm; cold-drawn / centerless-ground for tighter tolerance + finer surface finish below 25 mm. Hex bar is hot-rolled to give the across-flats dimension matched to hex nut blank manufacture, saves the machining step required when starting from round bar. TorqBolt supplies Incoloy 925 bar in 6 mm to 350 mm diameter (round), with hex / square / flat variants in standard sizes, in lengths to 6 m, with 100% hardness inspection ensuring the 35 HRC NACE MR0175 sour-service cap.
Need Incoloy 925 bar? Email info@torqbolt.com with cross-section (round / hex / square / flat), diameter or AF, length, finish (hot-rolled / cold-drawn / ground / polished), quantity, applicable standards. WhatsApp +91-22-66157017.
Bar Forms Manufactured
| Form | Size Range | Finish | Typical Use |
|---|---|---|---|
| Round bar (hot-rolled / hot-forged) | 25 mm to 350 mm dia | Hot-rolled descaled, peeled, ground | Stud bolt + hex bolt blanks; forging stock; large machined parts |
| Round bar (cold-drawn / ground) | 6 mm to 25 mm dia | Cold-drawn (h9 / h11 tolerance) or centerless-ground (h6 / h7) | Precision machined components; SHCS + small fastener blanks |
| Hex bar | 1/4" AF to 2" AF (M6 to M48 nut equiv) | Hot-rolled or cold-drawn | Hex nut blank; saves hex profile machining |
| Square bar | 10 mm to 100 mm AF | Hot-rolled or cold-drawn | Square key stock; structural square members |
| Flat bar | 10 mm to 200 mm wide × 3 to 50 mm thick | Hot-rolled descaled or cold-finished | Strap / blank for cold-bent washers + brackets |
| Forging stock (cut billet) | 50 mm to 500 mm dia, cut to length | As-rolled | Input for further closed-die or open-die forging |
Standard Round Bar Sizes
| Diameter | Process | Tolerance Class | Length |
|---|---|---|---|
| 6 to 25 mm | Cold-drawn / ground | h9 (CD) / h6 (ground) | 1, 3, 6 m random |
| 25 to 100 mm | Hot-rolled + peeled | k12 (rolled) / h9 (peeled) | 3 to 6 m random |
| 100 to 250 mm | Hot-rolled / hot-forged | +5%/-0% | 2 to 6 m |
| 250 to 350 mm | Hot-forged | +10%/-0% | 1 to 4 m |
Mechanical Properties (Aged)
Tensile 165 ksi min / Yield 110 ksi min / Elongation 18% min / Hardness 32–35 HRC (NACE cap) per ASTM B805. See full mechanical properties page for elevated-temperature data + Charpy envelope.
Applications
- Input stock for stud bolts, hex bolts, threaded rods and other fastener manufacture
- Forging stock for closed-die or open-die forging of wellhead hangers and pressure-vessel components
- Machined-from-bar components: pump shafting, valve stems, instrument fittings, downhole tool bodies
- Downhole tool machining stock (sour-service production-tubing internals)
- Hex bar for hex nut + heavy hex nut blank manufacture
- Pump shafting (long round bar for sour-service centrifugal pumps in marine service)
- Custom shaft + spindle machining for sour-service rotating machinery
Standards
- ASTM B805, Standard Specification for Forgings and Forging Stock for Wrought Precipitation Hardened UNS N09925 (the primary specification)
- ASTM B564, Standard Specification for Nickel Alloy Forgings (general nickel-alloy forging requirements)
- ASTM A484, General Requirements for Stainless and Heat-Resisting Wrought Steel Bar (dimensional reference)
- API 6A, Wellhead and Tree Equipment (when bar is used for wellhead components)
- NACE MR0175 / ISO 15156-3 Table A.10, sour service
- NORSOK M-630 MDS A30; EN 10204 3.1 / 3.2; ASME II Part B (SB-805)
Manufacturing Sequence
- VIM-VAR (vacuum induction melt + vacuum arc remelt) or AOD (argon-oxygen decarburised) primary melt at approved mill (Special Metals, Sandvik, VDM, ATI)
- Hot-rolled or hot-forged to near-net bar dimension
- Cold-drawn / centerless-ground for small-diameter precision bar
- Solution anneal + age cycle per heat-treatment specification (1900°F WQ + 1365°F × 8h FC + 1150°F × 8h AC)
- Final inspection: dimensional, straightness, 100% hardness per ASTM E18, sample tensile + Charpy, ultrasonic per ASTM E2375 on request
- Marking: heat number stamped on each bar end + UNS N09925 + ASTM B805 + NACE stamp (sour orders)
Frequently Asked Questions
What's the smallest diameter you supply? 6 mm cold-drawn round; smaller goes to wire classification (cold-drawn from billet). Below 3 mm, supply is wire only.
Hot-rolled or cold-drawn for fastener manufacture? Hot-rolled for >25 mm; cold-drawn for ≤25 mm. The cold-drawn surface is cleaner + tolerance is tighter, but cold work in the surface layer requires the post-cold-draw solution anneal to remove. TorqBolt always anneals + ages cold-drawn bar before fastener manufacture.
Lead time? Standard sizes (15 to 100 mm round): 4–6 weeks ex-stock or 8–10 weeks new-melt. Larger / forged bars (above 100 mm): 12–16 weeks. Hex / square / flat: 8–12 weeks.
Documentation Package & Related Products
EN 10204 3.1 MTC (3.2 with TPI on request); chemistry, tensile, 100% hardness, dimensional + straightness inspection, sample Charpy, optional UT per ASTM E2375, NACE MR0175 reference. Related: forgings, rods, wire, rings, threaded rods, full datasheet.
Request a Quote
Email info@torqbolt.com · Phone +91-22-66157017 · WhatsApp +91-22-66157017. Specify cross-section, size, length, tolerance class, finish, quantity, applicable standards (ASTM B805 + optional API 6A / NACE MR0175 / NORSOK MDS A30), MTC level.
References: ASTM B805; ASTM B564 (nickel alloy forgings general); ASTM A484 (dimensional reference); ASTM E18 (Rockwell hardness); ASTM E2375 (UT inspection); ASME II Part B (SB-805); API Specification 6A; NACE MR0175 / ISO 15156-3 Table A.10; NORSOK M-630 / M-650; EN 10204. Special Metals Corporation INCOLOY® alloy 925 Technical Bulletin. INCOLOY® is a registered trademark of Special Metals Corporation.
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