TWI Frequently asked questions
by Briony Holmes
The table below compares European and American Standards for commonly used stainless steel welding filler materials. It is intended to give comparisons only; these may not represent direct equivalents.
| BS EN ISO 14343:2007 | ANSI/AWS A5.9/A5.9M: 2006 | UNS number |
|---|
| 13 | ER410 | S41080 |
| 13 4 | ER410NiMo | S41086 |
| 17 | ER430 | S43080 |
| 19 9 L | ER308L | S30883 |
| 19 9 H | ER308H | S30880 |
| 23 12 L | ER309L | S30983 |
| 23 12 2 L | ER309LMo | S30986 |
| 25 20 | ER310 | S31080 |
| 29 9 | ER312 | S31380 |
| 19 12 3 L | ER316L | S31683 |
| 19 12 3 H | ER316H | S31680 |
| 19 13 4 L | ER317L | S31783 |
| 19 12 3 Nb | ER318 | S31980 |
| 19 9 Nb | ER347 | S34780 |
| 22 9 3 NL | ER2209 | S39209 |
Further information
What are the equivalent European and American Standards for common stainless steels?
Welding of austenitic stainless steels - a guide to best practice
Fabrication with low cost stainless steels - a guide to best practice
Arc welding duplex stainless steels - a guide to best practice
