--- title: "UNS steel grades — 2038 designations — Page 22" description: "Steel grades designated under UNS, with chemical composition, mechanical properties and equivalents in other standards. 2038 designations across…" canonical: https://steelequivalents.com/materials/uns/page/22 language: en robots: index, follow og_type: website type: material-standard language_alternates: en: https://steelequivalents.com/materials/uns/page/22.md cs: https://steelequivalents.com/cs/materiály/uns.md de: https://steelequivalents.com/de/werkstoffe/uns.md es: https://steelequivalents.com/es/materiales/uns.md fr: https://steelequivalents.com/fr/matériaux/uns.md hu: https://steelequivalents.com/hu/anyagok/uns.md it: https://steelequivalents.com/it/materiali/uns.md nl: https://steelequivalents.com/nl/materialen/uns.md pl: https://steelequivalents.com/pl/materiały/uns.md pt: https://steelequivalents.com/pt/materiais/uns.md ru: https://steelequivalents.com/ru/материалы/uns.md tr: https://steelequivalents.com/tr/malzemeler/uns.md zh: https://steelequivalents.com/zh/材料/uns.md ja: https://steelequivalents.com/ja/材料/uns.md ar: https://steelequivalents.com/ar/المواد/uns.md ko: https://steelequivalents.com/ko/재료/uns.md pt-br: https://steelequivalents.com/pt-br/materiais/uns.md hi: https://steelequivalents.com/hi/सामग्री/uns.md content_hash: sha256:854e54f4680db4815d6830414ccc98d40e091ba812c7ec5a4732230bf64485a9 generated: 2026-09-26 --- > **Machine-readable Markdown rendering.** This is a Markdown representation of a web page, > served for AI agents and crawlers as a token-efficient alternative to the full HTML. > Full interactive HTML version: https://steelequivalents.com/materials/uns/page/22 > Canonical URL: https://steelequivalents.com/materials/uns/page/22 > Available languages: en, cs, de, es, fr, hu, it, nl, pl, pt, ru, tr, zh, ja, ar, ko, pt-br, hi > Change detection: `content_hash` is the SHA-256 of this document's Markdown body — everything > below this block, whitespace-trimmed, excluding the front-matter. Compare it to detect a real > content change; `generated` moves on every render and is not a change signal. UNS · 2,038 grades # UNS steel grades — 2038 designations — Page 22 Every grade designated under UNS, with the material number it maps to, what kind of steel it is, its carbon window and how many other standards carry it. Open a grade for its full composition, properties and its designations in other standards. Unless marked, every name here is an indicative cross-reference, not an asserted identity — the grades are close, not interchangeable. 8 of 50 rows differ and carry a “This grade’s own name” mark. ## Also known as 2038 designations | Grade | Material no. | Category | C% by weight | Also in other standards | |---|---|---|---|---| | [K12143](/materials/uns/k12143 "K12143") This grade’s own name | [1.7332](/materials/material-no/1.7332 "1.7332") | Heat-resistant structural steels | ≤ 0.21 | 1 | | [K12147](/materials/uns/k12147 "K12147") This grade’s own name | [1.6523](/materials/material-no/1.6523 "1.6523") | Case hardening steels | 0.17–0.23 | 18 | | [K12202](/materials/uns/k12202 "K12202") | [1.8836](/materials/material-no/1.8836 "1.8836") | Fine-grain structural steels | ≤ 0.16 | 3 | | [K12202](/materials/uns/k12202 "K12202") | [1.8902](/materials/material-no/1.8902 "1.8902") | Fine-grain structural steels | ≤ 0.2 | 19 | | [K12202](/materials/uns/k12202 "K12202") | [1.8905](/materials/material-no/1.8905 "1.8905") | Fine-grain structural steels | ≤ 0.2 | 14 | | [K12202](/materials/uns/k12202 "K12202") | [1.8912](/materials/material-no/1.8912 "1.8912") | Fine-grain structural steels | ≤ 0.2 | 5 | | [K12202](/materials/uns/k12202 "K12202") | [1.8915](/materials/material-no/1.8915 "1.8915") | Fine-grain structural steels | ≤ 0.2 | 2 | | [K12202](/materials/uns/k12202 "K12202") | [1.8919](/materials/material-no/1.8919 "1.8919") | Fine-grain structural steels | ≤ 0.21 | 1 | | [K12202](/materials/uns/k12202 "K12202") | [1.8932](/materials/material-no/1.8932 "1.8932") | Fine-grain structural steels | ≤ 0.2 | 1 | | [K12202](/materials/uns/k12202 "K12202") | [1.8935](/materials/material-no/1.8935 "1.8935") | Fine-grain structural steels | ≤ 0.2 | 3 | | [K12211](/materials/uns/k12211 "K12211") | [1.0562](/materials/material-no/1.0562 "1.0562") | Fine-grain structural steels | ≤ 0.18 | 18 | | [K12211](/materials/uns/k12211 "K12211") | [1.8963](/materials/material-no/1.8963 "1.8963") | Weathering steels | ≤ 0.16 | 9 | | [K12320](/materials/uns/k12320 "K12320") This grade’s own name | [1.5415](/materials/material-no/1.5415 "1.5415") | Heat-resistant structural steels | 0.12–0.2 | 15 | | [K12320](/materials/uns/k12320 "K12320") This grade’s own name | [1.5423](/materials/material-no/1.5423 "1.5423") | Heat-resistant structural steels | 0.12–0.2 | 5 | | [K12437](/materials/uns/k12437 "K12437") | [1.0473](/materials/material-no/1.0473 "1.0473") | Heat-resistant structural steels | 0.1–0.22 | 10 | | [K12437](/materials/uns/k12437 "K12437") | [1.0488](/materials/material-no/1.0488 "1.0488") | Fine-grain structural steels | ≤ 0.16 | 4 | | [K12437](/materials/uns/k12437 "K12437") | [1.0539](/materials/material-no/1.0539 "1.0539") | Fine-grain structural steels | ≤ 0.2 | 1 | | [K12437](/materials/uns/k12437 "K12437") | [1.0562](/materials/material-no/1.0562 "1.0562") | Fine-grain structural steels | ≤ 0.18 | 18 | | [K12437](/materials/uns/k12437 "K12437") | [1.0583](/materials/material-no/1.0583 "1.0583") | Others | ≤ 0.18 | 1 | | [K12437](/materials/uns/k12437 "K12437") | [1.0584](/materials/material-no/1.0584 "1.0584") | Others | ≤ 0.18 | 1 | | [K12437](/materials/uns/k12437 "K12437") | [1.0589](/materials/material-no/1.0589 "1.0589") | Others | ≤ 0.18 | 1 | | [K12437](/materials/uns/k12437 "K12437") | [1.1106](/materials/material-no/1.1106 "1.1106") | Fine-grain structural steels | ≤ 0.18 | 2 | | [K12437](/materials/uns/k12437 "K12437") | [1.8864](/materials/material-no/1.8864 "1.8864") | Others | ≤ 0.18 | 1 | | [K12437](/materials/uns/k12437 "K12437") | [1.8902](/materials/material-no/1.8902 "1.8902") | Fine-grain structural steels | ≤ 0.2 | 19 | | [K12437](/materials/uns/k12437 "K12437") | [1.8912](/materials/material-no/1.8912 "1.8912") | Fine-grain structural steels | ≤ 0.2 | 5 | | [K12437](/materials/uns/k12437 "K12437") | [1.8932](/materials/material-no/1.8932 "1.8932") | Fine-grain structural steels | ≤ 0.2 | 1 | | [K12437](/materials/uns/k12437 "K12437") | [1.9533](/materials/material-no/1.9533 "1.9533") | Others | ≤ 0.24 | 1 | | [K12447](/materials/uns/k12447 "K12447") | [1.0436](/materials/material-no/1.0436 "1.0436") | Fine-grain structural steels | 0.15–0.2 | 14 | | [K12447](/materials/uns/k12447 "K12447") | [1.0562](/materials/material-no/1.0562 "1.0562") | Fine-grain structural steels | ≤ 0.18 | 18 | | [K12447](/materials/uns/k12447 "K12447") This grade’s own name | [1.0577](/materials/material-no/1.0577 "1.0577") | Unalloyed structural steels | ≤ 0.2 | 11 | | [K12447](/materials/uns/k12447 "K12447") | [1.8837](/materials/material-no/1.8837 "1.8837") | Others | ≤ 0.16 | 1 | | [K12447](/materials/uns/k12447 "K12447") | [1.8870](/materials/material-no/1.8870 "1.8870") | Fine-grain structural steels | ≤ 0.18 | 1 | | [K12510](/materials/uns/k12510 "K12510") This grade’s own name | [1.1106](/materials/material-no/1.1106 "1.1106") | Fine-grain structural steels | ≤ 0.18 | 2 | | [K12524](/materials/uns/k12524 "K12524") This grade’s own name | [1.8815](/materials/material-no/1.8815 "1.8815") | Others | ≤ 0.2 | 1 | | [K12524](/materials/uns/k12524 "K12524") | [1.8905](/materials/material-no/1.8905 "1.8905") | Fine-grain structural steels | ≤ 0.2 | 14 | | [K12524](/materials/uns/k12524 "K12524") | [1.8907](/materials/material-no/1.8907 "1.8907") | Fine-grain structural steels | ≤ 0.21 | 1 | | [K12524](/materials/uns/k12524 "K12524") | [1.8917](/materials/material-no/1.8917 "1.8917") | Fine-grain structural steels | ≤ 0.21 | 1 | | [K12524](/materials/uns/k12524 "K12524") | [1.8937](/materials/material-no/1.8937 "1.8937") | Fine-grain structural steels | ≤ 0.21 | 1 | | [K12529](/materials/uns/k12529 "K12529") | [1.5403](/materials/material-no/1.5403 "1.5403") | Heat-resistant structural steels | ≤ 0.19 | 1 | | [K12529](/materials/uns/k12529 "K12529") | [1.6310](/materials/material-no/1.6310 "1.6310") | Heat-resistant structural steels | 0.17–0.23 | 1 | | [K12529](/materials/uns/k12529 "K12529") | [1.6311](/materials/material-no/1.6311 "1.6311") | Heat-resistant structural steels | 0.15–0.23 | 1 | | [K12529](/materials/uns/k12529 "K12529") | [1.6368](/materials/material-no/1.6368 "1.6368") | Heat-resistant structural steels | ≤ 0.17 | 4 | | [K12539](/materials/uns/k12539 "K12539") | [1.5403](/materials/material-no/1.5403 "1.5403") | Heat-resistant structural steels | ≤ 0.19 | 1 | | [K12539](/materials/uns/k12539 "K12539") | [1.6310](/materials/material-no/1.6310 "1.6310") | Heat-resistant structural steels | 0.17–0.23 | 1 | | [K12539](/materials/uns/k12539 "K12539") | [1.6311](/materials/material-no/1.6311 "1.6311") | Heat-resistant structural steels | 0.15–0.23 | 1 | | [K12539](/materials/uns/k12539 "K12539") | [1.6368](/materials/material-no/1.6368 "1.6368") | Heat-resistant structural steels | ≤ 0.17 | 4 | | [K12542](/materials/uns/k12542 "K12542") This grade’s own name | [1.8812](/materials/material-no/1.8812 "1.8812") | Heat-resistant structural steels | ≤ 0.2 | 1 | | [K12554](/materials/uns/k12554 "K12554") | [1.5403](/materials/material-no/1.5403 "1.5403") | Heat-resistant structural steels | ≤ 0.19 | 1 | | [K12554](/materials/uns/k12554 "K12554") | [1.6310](/materials/material-no/1.6310 "1.6310") | Heat-resistant structural steels | 0.17–0.23 | 1 | | [K12554](/materials/uns/k12554 "K12554") | [1.6311](/materials/material-no/1.6311 "1.6311") | Heat-resistant structural steels | 0.15–0.23 | 1 | **This grade’s own name** — recorded in our sources as this grade’s own designation under that standard. **Indicative** — taken from a published cross-reference table; a close match, not a guarantee of interchangeability. Verify against the mill certificate before ordering. **Withdrawn** — designation no longer current — a separate column from the two above, so a name can be same grade and withdrawn at once. [Previous](/materials/uns/page/21 "Previous") Page 22 of 41[Next](/materials/uns/page/23 "Next")