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SESK: Stuff Everyone Should Know · sesk.info/weld-filler-7018-1

What does the -1 in an electrode code like 7018-1 mean?

Improved toughness.

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  1. It is for one pass only
  2. It is a first-generation rod
  3. It meets improved toughness requirements ✔

Why: Optional designators add detail to the main code. The -1 on a stick electrode marks improved toughness.

Huh, didn't know that: Hobart says H4, H8 and H16 are diffusible hydrogen designators, and lower numbers mean less hydrogen risk.

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What's another name for Silver Surfer and Iron Man? Instant alloys.
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References

Answer: It meets improved toughness requirements. Optional designators add detail to the main code. The -1 on a stick electrode marks improved toughness.

  1. 7 Common Questions About Filler Metals (Hobart Brothers) www.hobartbrothers.com/resources/technical-articles/7-common-questions-and-answers-about-filler-metals
    The -1 in a stick electrode classification, such as 7018-1, means it meets requirements for improved toughness.
    Checked 2026-10-10.

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