Haynes 556 Filler Wire
Metracore Alloys Private Limited stocks and exports Haynes 556 filler wire for sulphidising, carburising and chlorine-bearing services. Fabricators, EPC contractors and plant maintenance teams across India and export markets draw on that stock. The wire carries the designation UNS R30556 and the filler-metal classification AWS A5.9 ER3556.
Its deposit is an iron-nickel-chromium-cobalt alloy: chromium at 21.0 to 23.0%, nickel at 19.0 to 22.5% and cobalt at 16.0 to 21.0% over an iron balance. Molybdenum and tungsten carry the solid-solution strengthening. Lanthanum improves oxide-scale adhesion, and tantalum contributes to deposit strength. Typical all-weld-metal tensile strength is around 740 MPa (107,000 psi) with about 43% elongation.
Diameters cover 0.76 mm to 4.70 mm, cut to 914 mm TIG lengths or wound onto MIG spools, reels and coils. AMS 5831 and ASME SFA-5.9 apply alongside the AWS classification. Waste-to-energy boilers, rotary calciners and refinery heaters account for most demand. Every heat ships with a material test certificate.
Why Choose Metracore Alloys Private Limited for Haynes 556 Filler Wire?
We hold Haynes 556 filler wire across the full diameter range, in TIG cut lengths and MIG spools, with reels and coils made to order. Every heat carries a material test certificate reporting chemical analysis against the ER3556 limits. Lot numbers stay traceable from receipt to dispatch.
Packing protects the wire from moisture and contamination in transit, which matters more for consumables than for bars or plates. We handle domestic despatch and export shipments, and we’ll quote bulk quantities against your diameter and form.
Haynes 556 Filler Wire Specifications
The parameters below cover what buyers verify before ordering.
Product Type
Filler wire, filler rod
Grade & Designations
Haynes 556 — UNS R30556, AWS A5.9 ER3556
Wire Diameter
0.76 mm to 4.70 mm
Standards
AWS A5.9, ASME SFA-5.9, AMS 5831
Haynes 556 Filler Wire Types
Four supply formats cover most requirements: TIG wire, MIG wire, filler rods and general welding wire.
Haynes 556 TIG Filler Wire
Haynes 556 MIG Welding Wire
Haynes 556 Filler Rods
Haynes 556 Welding Wire
Haynes 556 TIG Filler Wire
Haynes 556 TIG filler wire feeds manually into the GTAW arc, giving welders direct control over deposition and heat input. Thin-wall tubing and precision repair joints benefit most.
Haynes 556 MIG Welding Wire
Continuous spooled feed separates the MIG product from TIG cut lengths. GMAW deposition rates suit longer seams on plates, with settings taken from the qualified procedures.
Haynes 556 Filler Rods
These straight rods measure 914 mm as standard, with other lengths cut on request. Welders apply them to GTAW fabrication and repair, up to 4.70 mm for heavier fill passes.
Haynes 556 Welding Wire
It is also the recommended filler for joining HAYNES HR-120 alloy, both to itself and to dissimilar base metals. Its chemical composition matches the base alloy closely enough for matching-composition welds, and the same wire can handle dissimilar joints.
Reach out to Metracore Alloys Private Limited for ready stock of Haynes 556 Filler Wire
Technical Details of Haynes 556 Filler Wire
Haynes 556 Filler Wire Specifications
The parameters below cover what buyers verify before ordering.
| Specification | Details |
| Material | Iron-Nickel-Chromium-Cobalt Alloy |
| Grade | Haynes 556 |
| UNS | R30556 |
| Product Type | Filler Wire / Filler Rod |
| Welding Process | TIG (GTAW), MIG (GMAW) |
| Wire Diameter | 0.76 mm to 4.70 mm |
| Form | MIG Spool / Reel / Coil / Straight Length |
| Filler Classification | AWS A5.9 ER3556 |
| Standards | AWS A5.9, ASME SFA-5.9, AMS 5831 |
| Surface | Bright |
| All-Weld-Metal Tensile | Approx. 740 MPa (107,000 psi) |
| Elongation | Approx. 43.1% |
| Testing | Chemical analysis, dimensional check |
| Certification | MTC / Certificate of Conformity |
Haynes 556 Filler Wire Chemical Composition
Limits below follow the ER3556 filler-metal specification, not the base-alloy standards, since permitted ranges differ.
| Element | Content (%) |
| Iron (Fe) | Remainder |
| Chromium (Cr) | 21.0 – 23.0 |
| Nickel (Ni) | 19.0 – 22.5 |
| Cobalt (Co) | 16.0 – 21.0 |
| Molybdenum (Mo) | 2.5 – 4.0 |
| Tungsten (W) | 2.0 – 3.5 |
| Manganese (Mn) | 0.50 – 2.0 |
| Niobium + Tantalum (Nb+Ta) | 0.30 – 1.25 |
| Silicon (Si) | 0.80 max |
| Aluminium (Al) | 0.50 max |
| Nitrogen (N) | 0.30 max |
| Carbon (C) | 0.15 max |
| Zirconium (Zr) | 0.15 max |
| Lanthanum (La) | 0.10 max |
| Phosphorus (P) | 0.04 max |
| Boron (B) | 0.02 max |
| Sulphur (S) | 0.015 max |
Chromium forms the oxide film that resists scaling. Molybdenum and tungsten maintain deposit strength at temperature, while cobalt stabilises the austenitic matrix. Lanthanum keeps that oxide bonded through thermal cycling.
Properties of Haynes 556 Filler Wire
Seven characteristics drive the selection of this filler metal:
- High-temperature strength: Molybdenum and tungsten in solid solution hold deposit strength at service temperature, where the tensile figures quoted above apply at room temperature only.
- Oxidation resistance: The 21.0 to 23.0% chromium content builds the protective scale, and lanthanum stops it from spalling off.
- Sulphidation resistance: Deposits hold up in hot atmospheres carrying sulphur, which is what decides most specifications.
- Carburisation resistance: The same chemistry resists carbon pickup in reducing conditions.
- Thermal stability: A stabilised austenitic matrix holds properties across repeated heating and cooling cycles.
- Weldability: Both GTAW and GMAW handle the wire. Preheating is not required under ambient conditions, though the interpass temperature should stay below 93°C.
- Chlorine resistance: Waste-to-energy flue gas carries chlorides that attack lower-alloy deposits.
Haynes 556 Filler Wire Welding Processes
- TIG / GTAW. Manual gas tungsten arc welding provides the tightest control over heat input. That matters in thin sections and repair cavities where dilution must stay low.
- MIG / GMAW. Spooled ER3556 suits gas metal arc welding where seam length or plate thickness makes higher deposition worthwhile. Shielding gas, transfer mode and travel speed come from the procedure.
- Dissimilar Metal Welding. ER3556 joins iron-based, nickel-based, and cobalt-based alloys to each other. The weld metal frequently outperforms the parent materials in strength and corrosion resistance.
Submerged arc welding isn’t recommended: high heat input and slow weld-pool cooling work against the deposit.
Haynes 556 Filler Wire Grade & Designations
Five designations appear on procurement documents, each describing something different.
- Haynes 556 names the alloy family, shorthand for the base metal and its matching filler.
- UNS R30556 is the Unified Numbering System code for the base alloy, fixing the chemistry the filler must match. Some filler metal datasheets print R30566; quote R30556 unless a purchase order specifies otherwise.
- AWS A5.9 ER3556 is the filler metal classification set within the specification for bare stainless and heat-resistant steel rods.
- ASME SFA-5.9 republishes it in Section II, Part C of the Boiler and Pressure Vessel Code.
- AMS 5831 covers the same wire for aerospace buyers, who cite it instead of the AWS number.
Haynes 556 Filler Wire Standards
Applicable standards depend on welding process, filler form and governing code:
- UNS R30556 for the base-alloy chemistry the filler matches
- AWS A5.9 ER3556 as the filler metal classification
- ASME SFA-5.9 under Boiler and Pressure Vessel Code rules
- AMS 5831 for aerospace procurement
- EN ISO 14343 in Europe, which AWS A5.9 adopts in modified form
- Customer and project specifications, adding test or documentation requirements
ER3556 joins base metals grouped as P-No. 45 under Section IX, including those supplied to SB-366, SB-435, SB-572, SB-619, SB-622 and SB-626.
Why Choose Metracore Alloys Private Limited?
We hold Haynes 556 filler wire across the full diameter range, in TIG cut lengths and MIG spools, with reels and coils made to order. Every heat carries a material test certificate reporting chemical analysis against the ER3556 limits. Lot numbers stay traceable from receipt to dispatch.
Packing protects the wire from moisture and contamination in transit, which matters more for consumables than for bars or plates. We handle domestic despatch and export shipments, and we’ll quote bulk quantities against your diameter and form.
Haynes 556 Filler Wire Sizes
Twelve diameters span 0.76 mm to 4.70 mm: 0.76, 0.80, 0.89, 1.00, 1.10, 1.20, 1.60, 2.00, 2.40, 3.20, 4.00 and 4.70 mm. Straight TIG rods are cut to 914 mm. Some diameters aren’t offered on spools or reels, so confirm form against size.
Applications of Haynes 556 Filler Wire
Industries specifying ER3556 share one requirement: joints surviving heat, sulphur and carbon together.
- Aerospace and gas turbines: combustor hardware, non-rotating hot-section parts
- Power generation: waste-to-energy boiler tubing, incinerator structural members
- Chemical processing: rotary calciners, carbon regenerators, reactor internals
- Petrochemical equipment: refinery units on high-sulphur feedstocks
- Industrial furnaces and heat-treatment equipment: retorts, muffles, radiant tubes
- Combustion systems: burners on low-grade fuels
- High-temperature fabrication: dissimilar joints in mixed alloy assemblies
- Repair and maintenance: build-up on degraded components
Exporter, Manufacturer & Supplier of Haynes 556 Filler Wire in various sizes and forms.
Haynes 556 Filler Wire FAQs
What is the UNS number of Haynes 556 filler wire?
The base alloy carries UNS R30556. The consumable is classified as AWS A5.9 ER3556.
What Are the Main Properties of Haynes 556 Filler Wire?
Six matters most: high-temperature strength, oxidation resistance, sulphidation and carburisation resistance, thermal stability and weldability. Typical tensile strength is around 740 MPa with about 43% elongation.
What Sizes of Haynes 556 Filler Wire Are Available?
Twelve diameters cover 0.76 mm to 4.70 mm, and TIG straight lengths are cut to 914 mm.
Can Haynes 556 Filler Wire Be Used for TIG Welding?
Yes. ER3556 ships as TIG cut lengths, the standard form ordered for tubing and repair.
Can Haynes 556 Filler Wire Be Used for MIG Welding?
Spooled ER3556 feeds through gas metal arc equipment for higher deposition on longer seams. Parameters come from the qualified procedure.
Where Is Haynes 556 Filler Wire Used?
Waste-to-energy boilers, rotary calciners, refinery heaters, industrial furnaces and gas turbine hot-section hardware account for most use.
What Standards Apply to Haynes 556 Filler Wire?
AWS A5.9, ASME SFA-5.9 and AMS 5831 apply. EN ISO 14343 covers the family in Europe.
What Certificates Are Supplied with Haynes 556 Filler Wire?
Material test certificates showing chemical analysis and lot traceability are shipped with every consignment. Certificates of Conformity follow where the specification asks for one.
How Can I Buy Haynes 556 Filler Wire from Metracore Alloys Private Limited?
Send the diameter, form and quantity you need. We’ll confirm stock, quote and despatch against your order.
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