--- title: "K12037 — 8 equivalent grades, compared" description: "The designation K12037 is carried by 8 different grades. Compare them on the elements that actually differ, then open the one your print means." canonical: https://steelequivalents.com/materials/uns/k12037 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/uns/k12037.md cs: https://steelequivalents.com/cs/materiály/uns/k12037.md de: https://steelequivalents.com/de/werkstoffe/uns/k12037.md es: https://steelequivalents.com/es/materiales/uns/k12037.md fr: https://steelequivalents.com/fr/matériaux/uns/k12037.md hu: https://steelequivalents.com/hu/anyagok/uns/k12037.md it: https://steelequivalents.com/it/materiali/uns/k12037.md nl: https://steelequivalents.com/nl/materialen/uns/k12037.md pl: https://steelequivalents.com/pl/materiały/uns/k12037.md pt: https://steelequivalents.com/pt/materiais/uns/k12037.md ru: https://steelequivalents.com/ru/материалы/uns/k12037.md tr: https://steelequivalents.com/tr/malzemeler/uns/k12037.md zh: https://steelequivalents.com/zh/材料/uns/k12037.md ja: https://steelequivalents.com/ja/材料/uns/k12037.md ar: https://steelequivalents.com/ar/المواد/uns/k12037.md ko: https://steelequivalents.com/ko/재료/uns/k12037.md pt-br: https://steelequivalents.com/pt-br/materiais/uns/k12037.md hi: https://steelequivalents.com/hi/सामग्री/uns/k12037.md content_hash: sha256:cd03bc7c4da2f1f94377af9c0ef3f45a8fdafc90252c4c5bb2bdf96597e5a4eb generated: 2026-09-22 --- > **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/k12037 > Canonical URL: https://steelequivalents.com/materials/uns/k12037 > 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 · United States · 8 grades # K12037 The designation K12037 is carried by 8 different grades. Compare them on the elements that actually differ, then open the one your print means. - *Matching grades* **8** - [*Category* **Fine-grain structural steels · 50 grades**](/categories/fine-grain-structural-steels "Category: Fine-grain structural steels · 50 grades") - [*Category* **Others · 1754 grades**](/categories/others "Category: Others · 1754 grades") - [*Category* **Unalloyed structural steels · 452 grades**](/categories/unalloyed-structural-steels "Category: Unalloyed structural steels · 452 grades") [Search](/search "Steel grade search")[Inquiry](/inquiry "Inquiry") ## Which of the 8 do you want? This name is carried by several grades. The elements shown are the ones whose values actually differ across the set — the ones that decide the question. Values are the source text verbatim; an em dash means no value on file for that element on that grade, not zero. | Grade | Material no. | Category | Designations | N% | S% | C% | P% | Mn% | Cu% | |---|---|---|---|---|---|---|---|---|---| | [A633Gr.D](/materials/din-en/a633gr-d "A633Gr.D") | [1.0546](/materials/material-no/1.0546 "1.0546") 1.0 | [Fine-grain structural steels](/categories/fine-grain-structural-steels "Fine-grain structural steels") | 15 | 0,015 | 0,02 | ≤0,18 | 0,025 | 0,90-1,65 | ≤0,55 | | [S355J0H](/materials/din-en/s355j0h "S355J0H") | [1.0547](/materials/material-no/1.0547 "1.0547") 1.0 | [Others](/categories/others "Others") | 7 | 0,009 | 0,035 | ≤0,22 | 0,035 | ≤1,60 | — | | [S355NLH](/materials/din-en/s355nlh "S355NLH") | [1.0549](/materials/material-no/1.0549 "1.0549") 1.0 | [Others](/categories/others "Others") | 3 | 0,02 | 0,025 | ≤0,18 | 0,03 | 0,90-1,65 | ≤0,35 | | [1.0562](/materials/material-no/1.0562 "1.0562") | [1.0562](/materials/material-no/1.0562 "1.0562") 1.0 | [Fine-grain structural steels](/categories/fine-grain-structural-steels "Fine-grain structural steels") | 74 | 0,012 | 0,015 | ≤0,18 | 0,025 | 1,10-1,70 | ≤0,30 | | [P355NH](/materials/din-en/p355nh "P355NH") | [1.0565](/materials/material-no/1.0565 "1.0565") 1.0 | [Fine-grain structural steels](/categories/fine-grain-structural-steels "Fine-grain structural steels") | 18 | 0,012 | 0,015 | ≤0,18 | 0,025 | 1,10-1,70 | ≤0,30 | | [1.0566](/materials/material-no/1.0566 "1.0566") | [1.0566](/materials/material-no/1.0566 "1.0566") 1.0 | [Fine-grain structural steels](/categories/fine-grain-structural-steels "Fine-grain structural steels") | 29 | 0,012 | 0,015 | ≤0,18 | 0,025 | 1,10-1,70 | ≤0,30 | | [1.0570](/materials/material-no/1.0570 "1.0570") | [1.0570](/materials/material-no/1.0570 "1.0570") 1.0 | [Unalloyed structural steels](/categories/unalloyed-structural-steels "Unalloyed structural steels") | 112 | — | 0,035 | ≤0,20 | 0,035 | ≤1,60 | — | | [1.0570](/materials/material-no/1.0570 "1.0570") | [1.0570](/materials/material-no/1.0570 "1.0570") 1.0 | [Unalloyed structural steels](/categories/unalloyed-structural-steels "Unalloyed structural steels") | 101 | — | 0,025 | ≤0,20 | 0,03 | ≤1,60 | — | ## Not sure which one your print means? Search the catalogue by designation, material number or composition — every name on this page is itself a way in. [Search](/search "Steel grade search")[Inquiry](/inquiry "Inquiry")