Grade Equivalent Chart (UNS / WNR / EN / JIS)
This grade equivalent chart lists stainless steel equivalent grades and the equivalents of the duplex, nickel alloy, titanium, carbon and alloy steel grades we supply, across the main designation systems: the American UNS number, the European material number (WNR / EN number), the EN or DIN name and the Japanese JIS grade. Use it to match a grade named in one standard to its counterpart in another.
Stainless steel, duplex, nickel alloys and titanium
| Grade | UNS | WNR / EN number | EN / DIN name | JIS |
|---|---|---|---|---|
| SS 304 | S30400 | 1.4301 | X5CrNi18-10 | SUS304 |
| SS 304L | S30403 | 1.4307 | X2CrNi18-9 | SUS304L |
| SS 316 | S31600 | 1.4401 | X5CrNiMo17-12-2 | SUS316 |
| SS 316L | S31603 | 1.4404 | X2CrNiMo17-12-2 | SUS316L |
| SS 316Ti | S31635 | 1.4571 | X6CrNiMoTi17-12-2 | SUS316Ti |
| SS 321 | S32100 | 1.4541 | X6CrNiTi18-10 | SUS321 |
| SS 347 | S34700 | 1.4550 | X6CrNiNb18-10 | SUS347 |
| SS 310S | S31008 | 1.4845 | X8CrNi25-21 | SUS310S |
| SS 904L | N08904 | 1.4539 | X1NiCrMoCu25-20-5 | SUS890L |
| SS 202 | S20200 | 1.4373 | X12CrMnNiN18-9-5 | SUS202 |
| SS 410 | S41000 | 1.4006 | X12Cr13 | SUS410 |
| SS 430 | S43000 | 1.4016 | X6Cr17 | SUS430 |
| Duplex 2205 | S31803 / S32205 | 1.4462 | X2CrNiMoN22-5-3 | SUS329J3L |
| Super duplex 2507 | S32750 | 1.4410 | X2CrNiMoN25-7-4 | – |
| Super duplex (Zeron® 100 type) | S32760 | 1.4501 | X2CrNiMoCuWN25-7-4 | – |
| Inconel 600 | N06600 | 2.4816 | NiCr15Fe | – |
| Inconel 625 | N06625 | 2.4856 | NiCr22Mo9Nb | – |
| Inconel 718 | N07718 | 2.4668 | NiCr19NbMo | – |
| Incoloy 800 | N08800 | 1.4876 | X10NiCrAlTi32-21 | – |
| Incoloy 800H | N08810 | 1.4958 | X5NiCrAlTi31-20 | – |
| Incoloy 825 | N08825 | 2.4858 | NiCr21Mo | – |
| Monel 400 | N04400 | 2.4360 | NiCu30Fe | – |
| Monel K-500 | N05500 | 2.4375 | NiCu30Al | – |
| Hastelloy C276 | N10276 | 2.4819 | NiMo16Cr15W | – |
| Hastelloy C22 | N06022 | 2.4602 | NiCr21Mo14W | – |
| Titanium Grade 2 | R50400 | 3.7035 | – | – |
| Titanium Grade 5 | R56400 | 3.7165 | – | – |
Links lead to each grade page, with composition, properties and products.
Carbon and alloy steel
| ASTM grade | UNS | WNR / EN number | EN name |
|---|---|---|---|
| ASTM A105 (forgings) | K03504 | 1.0460 | P250GH (nearest) |
| ASTM A106 Gr B (pipe) | K03006 | 1.0425 | P265GH (nearest) |
| ASTM A516 Gr 70 (plate) | K02700 | 1.0473 | P355GH (nearest) |
| ASTM A335 P11 | K11597 | 1.7335 | 13CrMo4-5 (nearest) |
| ASTM A335 P22 | K21590 | 1.7380 | 10CrMo9-10 (nearest) |
| ASTM A335 P91 | K91560 | 1.4903 | X10CrMoVNb9-1 (nearest) |
Carbon and alloy steel grades are defined differently in ASTM and EN standards – often with different strength levels, test temperatures and product forms – so these are the nearest grades, not direct substitutes.
Equivalent does not mean identical
Equivalent grades in different systems have similar composition and are used for similar purposes, but their composition limits, mechanical properties and test requirements are not identical. For example, EN 1.4404 and ASTM 316L have slightly different limits on nickel and molybdenum. Material for pressure equipment must be certified to the standard named in the design or purchase specification; dual certification to ASTM and EN is available for many grades. If you need to substitute one grade for another, please check with the designer or the inspection authority.
More grade information is on the materials page and the grade pages for SS 304, SS 316, duplex 2205 and Inconel 625. More charts are on the technical resources page.
Frequently Asked Questions
SS 316L (UNS S31603) corresponds to EN 1.4404, X2CrNiMo17-12-2, and JIS SUS316L.
Duplex 2205 is UNS S31803 or the tighter S32205, both corresponding to EN 1.4462.
Inconel 625 (UNS N06625) corresponds to WNR 2.4856, NiCr22Mo9Nb.
Not automatically. Composition and property limits differ between standards, so material must be certified to the standard in the specification.
The nearest European grade is P265GH (1.0425) to EN 10216-2, though the standards differ.
Inconel®, Incoloy® and Monel® are trademarks of Special Metals Corporation; Hastelloy® of Haynes International; Zeron® 100 of Rolled Alloys.