Oct 9, 2026
Can I Replace ER100S-G With ER110S-G? What Should I Check?
Can ER100S-G replace ER110S-G? Check required weld strength, product test data and WPS/PQR requirements before substituting high-strength welding wire.
Short answer: ER100S-G and ER110S-G are not automatically interchangeable. ER110S-G has a higher strength classification, but that alone does not prove it is a suitable replacement for ER100S-G.
Before switching high-strength welding wire, confirm the required weld-metal properties, actual product chemistry and approval requirements for your application.
When Should You Replace ER100S-G With ER110S-G?
Start by identifying why you need to change the welding wire.
- Higher weld strength is required: Evaluate ER110S-G against the specified tensile and yield strength requirements.
- ER100S-G already meets the specification: A higher-strength classification may offer no practical benefit.
- A customer or project specification requires ER110S-G: Follow the specified classification and confirm product compliance.
- You want to substitute one available wire for another: Verify technical equivalence and obtain any required approval before production.
The correct choice depends on the joint requirements, not simply which wire has the higher strength classification.
4 Checks Before Switching Welding Wire
What to check | What you need to verify |
|---|---|
Weld-metal strength | Tensile and yield strength meet the specified requirements. |
Impact toughness | Charpy impact data meet the required test temperature and acceptance criteria, where applicable. |
Chemical composition | Actual product chemistry is compatible with the base metal and service conditions. |
WPS/PQR and code | The substitution is permitted under the applicable welding procedure, code and project specification. |
Important: ER100S-G and ER110S-G both use the AWS “G” classification. The designation does not specify one single, fixed alloy chemistry. Request the manufacturer's technical data and relevant test reports rather than assuming all products with the same classification have identical properties.
Also confirm whether the change affects the qualified welding process, shielding gas, heat input or post-weld heat treatment requirements.
Does ER110S-G Require Welding Procedure Requalification?
Not in every case. Whether changing from ER100S-G to ER110S-G requires requalification depends on the governing code, applicable essential variables, existing WPS/PQR and project requirements.
Before ordering, confirm the following:
- The exact base-metal grade and applicable specification.
- The required weld-metal strength and impact toughness.
- The proposed wire's technical data and test results.
- Whether the change requires procedure requalification or customer approval.
Do not make a production change based on classification alone.
For a broader comparison of strength classifications, read ER80S-D2 vs ER90S-D2 vs ER100S-G vs ER110S-G: How to Choose.
Conclusion: Can ER100S-G Be Replaced With ER110S-G?
Yes, potentially—but only when the application requirements and applicable approvals support the change. Verify strength, toughness, chemistry and welding procedure requirements before substituting ER110S-G for ER100S-G.
If you are sourcing a replacement, provide the base-metal grade, required mechanical properties, welding process and applicable specification so the proposed wire can be evaluated correctly.
