The Harris ER630 (17-4PH) Stainless TIG (GTAW) Welding Rod is a martensitic precipitation-hardening stainless steel GTAW rod classified to AWS A5.9/A5.9M ER630 and ASME SFA 5.9. Designed primarily for welding ASTM A-564 Type 630 and other precipitation-hardening stainless steels, ER630 delivers an outstanding combination of high tensile strength, excellent corrosion resistance, and good toughness — making it ideal for aerospace, chemical processing, and high-technology industrial applications.
- Classification: ER630
- Alloy class: Stainless
- Polarity: DCEN
- Positions: All positions
- Available diameters: 1/16"
- Process: GTAW
- Classification: ER630
- AWS Classification: AWS A5.9/A5.9M ER630 (17-4PH)
- ASME SFA 5.9 ER630; AMS 5825
- Alloy type: Martensitic precipitation-hardening stainless (17% Cr, 4% Ni, 4% Cu)
- Polarity: DCEN (DC straight polarity) for GTAW
- Shielding gas: 100% Argon or 98% Ar / 2% O₂
- Tensile strength (as-welded): 160,000 psi
- Yield strength (as-welded): 145,000 psi
- Elongation (as-welded): 5%
Welding ASTM A-564 Type 630 (17-4PH) precipitation-hardening stainless steels. Applications include aerospace components, chemical processing equipment, aircraft parts, continuous extrusion equipment, tubular structures, pressure vessels, small bellows, and diaphragm assemblies where high strength and excellent corrosion resistance are required simultaneously.
- AWS A5.9 ER630 (17-4PH) — martensitic precipitation-hardening stainless alloy
- 160,000 psi tensile strength as-welded — outstanding strength-to-weight ratio
- Good corrosion resistance up to 600°F (316°C)
- More cost-effective than many high-nickel non-ferrous alloys for comparable applications
- Post-weld heat treatment (precipitation hardening) recommended for peak mechanical properties
- Conforms to ANSI/AWS A5.9, ASME SFA 5.9, and AMS 5825
| Condition | Tensile Strength | Yield Strength | Elongation |
|---|---|---|---|
| As-welded | 160,000 psi | 145,000 psi | 5% |
| Diameter | Package |
|---|---|
| 1/16" | 10 lb |
This Combined Listing parent page aggregates all package sizes and diameters for the Harris ER630 17-4PH Stainless TIG (GTAW) Welding Rod product family. Use the variant selector or browse individual child listings to find your specific size and packaging configuration.