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 Wire (UNS N09925)
Cold-drawn wire, welding wire (INCO-WELD 725NDUR / AWS ERNiCrMo-15), lockwire (MS33540), spring wire
Incoloy 925 wire (UNS N09925) is cold-drawn small-section round product (typically 0.1 mm to 6 mm diameter, smaller than rods or bars) supplied in three primary forms: (1) bare cold-drawn wire for downstream forming + welding-electrode manufacture; (2) AWS A5.14 ERNiCrMo-15 welding wire matching INCO-WELD® 725NDUR for GTAW + GMAW joining of Incoloy 925 (see welding spec); and (3) lockwire / safety-wire for MS33540 aerospace + sour-service fastener-retention applications. Cold-drawing through dies imparts surface finish + dimensional precision (typically ±0.005 mm tolerance for fine wire below 1 mm) that hot-rolling cannot achieve. The cold-drawn condition introduces work hardening; subsequent solution anneal + age cycle (per heat-treatment specification) restores uniform metallurgy with the standard 110 ksi YS / 35 HRC NACE-cap properties. TorqBolt manufactures Incoloy 925 wire in 0.1 mm to 6 mm diameter, supplied as cut-length bundles (welding wire) or coils / spools (general / lockwire), with hardness controlled within the 35 HRC NACE MR0175 sour-service cap.
Need Incoloy 925 wire? Email info@torqbolt.com with wire form (cold-drawn / welding / lockwire / spring), diameter, supply form (cut / coil / spool), quantity. WhatsApp +91-22-66157017.
Wire Variants Manufactured
| Variant | Description | Standard | Use |
|---|---|---|---|
| Cold-drawn wire (general) | Bare round wire, cold-drawn precision (h6 / h7), bright surface | ASTM B805 chemistry / ASTM A555 dimensional | Downstream forming, fastener-blank input, electrode manufacture |
| Welding wire (bare TIG / MIG) | AWS A5.14 ERNiCrMo-15 chemistry, matches INCO-WELD 725NDUR filler | AWS A5.14 ERNiCrMo-15 / ISO 18274 SNi7725 | GTAW + GMAW for matching-strength Incoloy 925 welds (see welding spec) |
| Coated welding electrode (SMAW) | Wire core + flux coating for stick welding | AWS A5.11 ENiCrMo-15 | Stick welding in field repair |
| Lockwire / safety wire | Annealed wire for tying / securing fastener pairs against rotation | MS33540 / NASM33540 / SAE AS567 | Aerospace + sour-service positive-fastener-retention |
| Spring wire | Cold-drawn wire with selective heat-treat for spring function | ASTM A752 dimensional / customer spring grade | Specialty springs in sour environment (custom) |
| Foil / ribbon wire | Cold-rolled to flat ribbon (0.025 mm to 0.5 mm thick) | Customer drawing | Sealing strip + thermal element wire |
Welding Wire Variant, AWS Reference
Welding wire form is the most-volume product supplied for matching-strength Incoloy 925 weld deposits:
- AWS A5.14 ERNiCrMo-15, bare wire / rod for GTAW (TIG) + GMAW (MIG); matches INCO-WELD® 725NDUR chemistry
- Diameters: 0.9 mm (.035"), 1.2 mm (.045"), 1.6 mm (1/16"), 2.4 mm (3/32"), 3.2 mm (1/8")
- Supply form: spool (5 / 10 / 15 kg) for automatic / semi-automatic; cut-length 1 m bundles for manual TIG
- Properties after PWHT: matches Incoloy 925 base metal, 165 ksi UTS / 110 ksi YS aged
- Companion stick electrode: AWS A5.11 ENiCrMo-15 (coated electrode form for SMAW)
Lockwire / Safety Wire (MS33540)
Lockwire form per MS33540 / NASM33540 / SAE AS567 is annealed (NOT aged) wire, supplied in coils for tying paired fasteners against rotation. Common diameters 0.020", 0.032", 0.041" (0.5 / 0.8 / 1.0 mm). Used in aerospace + sour-service applications where cotter-pin retention is impractical and where the assembly must be tamper-evident.
Standard Size Range
| Diameter | Tolerance | Supply Form |
|---|---|---|
| 0.1 to 0.5 mm (foil / fine wire) | ±0.005 mm | Spool 1–5 kg |
| 0.5 to 1.6 mm (welding / lockwire) | ±0.025 mm | Spool 5–15 kg or 1 m cut |
| 1.6 to 3.2 mm (welding wire) | ±0.05 mm (h9) | Spool 10–25 kg or 1 m cut |
| 3.2 to 6 mm (general) | ±0.05 mm (h9 / h11) | Coil or random length |
Mechanical Properties
Annealed wire: Tensile ~110 ksi / Yield ~50 ksi / Elongation 30%. Aged wire: Tensile 165 ksi min / Yield 110 ksi min / Elongation 18% / Hardness 32–35 HRC (NACE cap). Welding wire is supplied in the ANNEALED condition (chemistry-only spec); the deposited weld metal develops aged properties only after the post-weld heat treatment cycle. See mech properties page.
Standards
- ASTM B805, UNS N09925 chemistry
- AWS A5.14 ERNiCrMo-15, bare welding wire (matches INCO-WELD 725NDUR)
- AWS A5.11 ENiCrMo-15, coated stick electrode
- ISO 18274 SNi7725, ISO welding wire designation
- MS33540 / NASM33540 / SAE AS567, lockwire / safety wire
- ASTM A555 / A752, general wire dimensional / spring wire
- NACE MR0175 / ISO 15156-3 Table A.10, sour service
- EN 10204 3.1 / 3.2; NORSOK M-630 MDS A30
Applications
- Welding filler for matching-strength Incoloy 925 joints (GTAW / GMAW, see welding page)
- Stick electrode core for SMAW field welding (AWS A5.11 ENiCrMo-15)
- Lockwire on sour-service paired-fastener assemblies (MS33540)
- Aerospace tie-wire in sour-environment engine accessories
- Cold-drawn wire for downstream spring-washer + small-section component manufacture
- Foil / ribbon for sealing strip + thermal element wire (custom)
- Specialty spring service in sour environment (with hardness compromise vs NACE cap)
Manufacturing Sequence
- Hot-rolled rod input per ASTM B805 chemistry, ~6–8 mm starting diameter
- Cold drawing through diamond dies in successive reductions to final wire diameter (intermediate annealing as required to relieve cold work)
- Final solution anneal + age cycle per heat-treatment specification (NOTE: welding wire shipped annealed-only; lockwire shipped soft-annealed; aged condition only for finished general wire)
- Spool / coil / cut-length packaging
- Final inspection: diameter Go/No-Go, surface finish, sample tensile, sample hardness, AWS A5.14 chemistry compliance for welding wire
- Spool / coil marked with heat number + AWS designation + diameter + heat-lot identification
Frequently Asked Questions
Welding wire vs INCO-WELD 725NDUR, same thing? Yes, INCO-WELD® 725NDUR is the trade name; AWS A5.14 ERNiCrMo-15 is the standard classification. Both refer to the same matching-composition filler used for joining Incoloy 925 to itself or to other nickel alloys.
Why is welding wire shipped annealed instead of aged? Welding wire is melted into the weld pool during welding, the supplied condition is irrelevant to the final weld metallurgy. Annealed condition gives better feed-ability through wire-feeders + better bend tolerance for spool packaging. The deposited weld develops aged properties via the post-weld heat-treatment cycle on the assembled part.
What's the difference between lockwire and tie-wire? Lockwire (MS33540 / safety wire) is a specific aerospace-grade soft-annealed wire optimized for tying paired fasteners against rotation. Tie-wire is a generic term for any flexible wire used to bind / secure components. Lockwire is the specialty form; tie-wire can be ordered as general cold-drawn annealed wire to customer-specific spec.
Lead time? Standard welding wire (1.6 / 2.4 / 3.2 mm spool): 6–8 weeks. Cold-drawn general wire: 8–10 weeks. Lockwire MS33540: 8–10 weeks (aerospace-grade qualification). Custom diameters / spool weights: 10–14 weeks.
Documentation Package & Related Products
EN 10204 3.1 MTC (3.2 with TPI on request); chemistry, dimensional + tolerance, sample tensile, sample hardness; for welding wire: AWS A5.14 chemistry compliance + heat-lot identification on each spool; for lockwire: MS33540 compliance + soft-anneal certification; NACE MR0175 reference (sour-service orders). Related: rods (welding rod cut-length form), bars, welding spec, full datasheet.
Request a Quote
Email info@torqbolt.com · Phone +91-22-66157017 · WhatsApp +91-22-66157017. Specify wire form (cold-drawn / welding / lockwire / spring / foil), diameter, supply form (spool / coil / cut), quantity, applicable standards (ASTM B805 / AWS A5.14 / MS33540 / NACE MR0175), MTC level.
References: ASTM B805; AWS A5.14 ERNiCrMo-15 (welding wire); AWS A5.11 ENiCrMo-15 (coated electrode); ISO 18274 SNi7725; MS33540 / NASM33540 / SAE AS567 (lockwire); ASTM A555 / A752; NACE MR0175 / ISO 15156-3 Table A.10; EN 10204. INCOLOY® and INCO-WELD® are registered trademarks of Special Metals Corporation.
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