ER630 Welding Wire
ER630 welding wire is a precipitation-hardening stainless steel filler metal classified under AWS A5.9 and used primarily for welding compatible 17-4 PH stainless steels, including UNS S17400. Metracore supplies ER630 welding wire as COREWELD 630 (17-4 PH) for applications requiring high strength, hardness, and corrosion resistance after suitable welding and heat treatment. Its chromium, nickel, copper, and niobium content supports the required weld-metal characteristics, while copper enables precipitation hardening during ageing. Final properties depend on the base material, welding procedure, and heat-treatment condition.
The COREWELD 630 datasheet contains technical specifications, chemical composition, mechanical properties, available sizes, and product details for ER630 welding wire.
ER630 filler wire is an AWS A5.9 filler-metal classification designed primarily for welding ASTM A564 Type 630 and other compatible precipitation-hardening stainless steels. It is commonly associated with 17-4 PH stainless steel, whose base-metal designation is UNS S17400. ER630 weld metal contains chromium, nickel, copper, and niobium and is normally predominantly martensitic with traces of ferrite. Its final mechanical properties depend strongly on the welding procedure and subsequent heat treatment.
ER630 Filler Wire, ER630 Mig Wire, ER630 Welding Wire Supplier
COREWELD 630 is designed for weld metal that can develop high strength and hardness after suitable precipitation-hardening treatment.
- With the inclusion of copper, effective precipitation hardening can achieve mechanical characteristics comparable to the 17-4 PH base metals
- Solution annealing and age hardening post-weld heat treatments give high yield strength and hardness
- The martensitic matrix offers for reliable resistance to atmospheric corrosion and mild chemical service conditions
- Optimised weld metal composition for clean deposition and good joint efficiency in high-stress mechanical components
Technical Specifications of ER630 Welding Wire
COREWELD 630 ER630 welding wire carries the classification and specification details set out below; verify all product-specific details against the official datasheet.
| Specification | Details |
| Brand | COREWELD 630 (17-4 PH) |
| Product Name | ER630 Welding Wire |
| Filler Metal Classification | ER630 |
| Material Type | Precipitation-Hardening Stainless Steel |
| Related Base Material | ASTM A564 type 630 and other precipitation-hardening stainless steels |
| Welding Process | GMAW, GTAW, and SAW (MIG, TIG, and Submerged Arc Welding) |
| Applicable Standard | Certified to AWS A5.9 and ASME SFA A5.9 |
| Available Wire Diameters | GMAW: 0.030 in (0.80 mm), 0.035 in (0.90 mm), 0.045 in (1.20 mm), 1/16 in (1.60 mm) GTAW: 0.035 in (0.90 mm), 0.045 in (1.20 mm), 1/16 in (1.60 mm), 3/32 in (2.40 mm) SAW: 3/32 in (2.40 mm), 1/8 in (3.20 mm), 5/32 in (4.00 mm), 3/16 in (4.80 mm) |
| Heat Treatment Requirements | Mechanical properties are highly dependent on the post-weld heat treatment (PWHT) and precipitation hardening applied (based on exposure temperature and time). |
Chemical Composition of ER630 Filler Wire
| Element | Composition |
| Chromium (Cr) | 15.0-17.5% (typical classification range) |
| Nickel (Ni) | 3.0-5.0% (typical classification range) |
| Copper (Cu) | 3.0-5.0% (typical classification range) |
| Carbon (C) | 0.05% max |
| Manganese (Mn) | 0.25-0.75% (typical classification range) |
| Silicon (Si) | 0.75% max |
| Niobium (Nb) | 0.15-0.30% (typical classification range) |
Mechanical Properties of ER630 Welding Wire
| Property | Value |
| Tensile Strength | 135,000 psi |
| Yield Strength | 150,000 psi |
| Elongation | 10% |
| Heat Treatment Condition | Weld metal can be used as-welded, welded and precipitation hardened, or welded and solution treated. |
Equivalent Grades of ER630 Welding Wire
| Standard | Designation |
| AWS / ASME | ER630 (AWS A5.9 / SFA-5.9) |
| Related Base Metal (UNS) | S17400 (17-4 PH) |
Applications of ER630 Filler Rod
- Valve stems and trim requiring post-weld hardness
- Pump shafts and components in compatible 17-4 PH stainless
- Oilfield and process equipment needing high strength after heat treatment
- Fastener and shaft repair welding in 17-4 PH assemblies
- Aerospace and general engineering components, subject to approved procedure
- Precision parts where dimensional stability after age hardening is required
Manufacturing Process of ER630 Mig Wire
Controlled copper addition during alloying is what sets ER630 processing apart: that element has to carry through cleanly to deliver the precipitation-hardening response later.
- Alloying with controlled chromium, nickel, and copper content
- Hot working of the billet into rod stock
- Cold drawing through successive dies to finished diameter
- Straightening, cutting, and spooling or cut-length packing
- Composition verification to confirm the age-hardening elements against classification
Why Choose COREWELD 630 ER630 Welding Wire?
COREWELD 630 (17-4 PH) is a validated classification and product forms, dimensions, packing and technical support are accessible from the official datasheet, not assumed. If this filler metal is to be used in a precipitation hardening application, the datasheet should be checked for product specifics before specification. No representations are made regarding certification, production capability, or quality assurances other than those specified for this product.
ER630 Welding Wire Supply and Technical Support
Our COREWELD 310 gives buyers a documented ER310 filler metal with verified AWS A5.9 / ASME SFA-5.9 classification, rather than an unspecified stainless wire. Diameters, rod lengths, and packaging sit on the official datasheet. Technical support covers base-metal compatibility and procedure questions ahead of an order. Review the datasheet first when evaluating this filler metal for high-temperature fabrication.
ER310 Welding Wire Supply and Technical Support
Enquiries cover confirmed wire diameters, filler rod dimensions, packaging, and order quantities once the base material specification is known. Share the base material specification, required product form, and welding procedure requirements when requesting product information. Stock availability and delivery timelines are not mentioned unless verified.
Products
FAQ's
What is ER630 welding wire used for?
It welds compatible 17-4 PH stainless components needing strength and hardness after post-weld age hardening.
What is the difference between ER630 filler wire and ER630 filler rod?
ER630 MIG wire is supplied for continuous feeding through a suitable MIG/GMAW setup, while ER630 filler rod is supplied in cut lengths for manual GTAW/TIG feeding.
Is ER630 welding wire suitable for 17-4 PH stainless steel?
Yes, subject to confirming compatibility against the applicable material specification and welding procedure.
What are the key characteristics of ER630 filler metal?
A copper addition that enables post-weld precipitation hardening, alongside chromium and nickel content for base corrosion resistance.
What sizes are available for COREWELD 630 welding wire?
Confirm wire diameters, rod dimensions, and packaging from the current datasheet.
Does ER630 welding require post-weld heat treatment?
Not always. ER630 weld metal may be used in the as-welded condition or subjected to a suitable solution and/or precipitation-hardening treatment, depending on the base material, weld design, required properties, and qualified welding procedure. The applicable procedure should define the required heat treatment.