Welding Wire
ER308H Stainless Steel Welding Wire
ER308H is a higher-carbon austenitic stainless steel filler metal used for specified welding applications involving 304H stainless steel. Its controlled carbon content of 0.04%–0.08% distinguishes it from low-carbon ER308L and makes it relevant to welding procedures designed for elevated-temperature service.
ER308H vs. ER308 vs. ER308L
Comparison | ER308H | ER308 | ER308L |
|---|---|---|---|
Carbon content | 0.04–0.08% | ≤ 0.08% | ≤ 0.03% |
Key characteristic | Controlled higher carbon range | Standard carbon range | Low-carbon composition |
Main selection consideration | Specified high-temperature service | General welding of compatible stainless steels | Applications requiring low-carbon filler metal |
Typical base-metal consideration | 304H | Compatible grades such as 304 | 304L and compatible grades |
ER308H is commonly considered when welding 304H and the applicable welding procedure calls for a higher-carbon filler metal. ER308L is not an automatic substitute because its lower carbon content can affect elevated-temperature weld-metal properties.
Choose the filler metal according to the base-metal specification, design code, service conditions, and qualified welding procedure (WPS).
Base Materials and High-Temperature Applications
ER308H is primarily associated with 304H austenitic stainless steel welding where elevated-temperature properties are important.
Potential application areas include:
- High-temperature process piping and equipment
- Petrochemical and chemical-processing installations
- Pressure equipment designed for elevated-temperature service
- Selected 321H or 347H applications when specified by a qualified welding procedure
For 321H and 347H components, filler-metal selection requires particular attention to component thickness, service temperature, and the risk of service-related heat-affected-zone cracking. These materials should not be treated as universally suitable for ER308H.
AWS Classification and Chemical Composition
ER308H is classified under AWS A5.9. The following are commonly referenced classification limits in weight percent. Confirm the applicable standard edition and actual product technical data sheet (TDS) before publication or use.
Element | Classification Limit (wt.%) |
|---|---|
C | 0.04–0.08 |
Mn | 1.00–2.50 |
Si | 0.30–0.65 |
P | ≤ 0.030 |
S | ≤ 0.030 |
Cr | 19.50–22.00 |
Ni | 9.00–11.00 |
Mo | ≤ 0.50 |
Cu | ≤ 0.75 |
These are classification limits, not guaranteed production-batch analysis results. Actual chemical composition and mechanical properties should be confirmed using the supplied product's TDS and inspection certificate where required.
Supply Specifications
ER308H may be supplied as MIG/GMAW solid wire or TIG/GTAW filler rods, depending on the manufacturer's product range. Other process-specific forms should be listed only when confirmed for the actual product.
Available diameters, packaging, and certification depend on the supply specification. Contact GD WELD to confirm current options.
Request a Quote for ER308H
Please provide the base-metal grade, welding process, required diameter, quantity, service conditions, and certification requirements so GD WELD can check the appropriate supply option.
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