--- title: "K12437 — 13 equivalent grades, compared" description: "The designation K12437 is carried by 13 different grades. Compare them on the elements that actually differ, then open the one your print means." canonical: https://steelequivalents.com/materials/uns/k12437 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/uns/k12437.md cs: https://steelequivalents.com/cs/materiály/uns/k12437.md de: https://steelequivalents.com/de/werkstoffe/uns/k12437.md es: https://steelequivalents.com/es/materiales/uns/k12437.md fr: https://steelequivalents.com/fr/matériaux/uns/k12437.md hu: https://steelequivalents.com/hu/anyagok/uns/k12437.md it: https://steelequivalents.com/it/materiali/uns/k12437.md nl: https://steelequivalents.com/nl/materialen/uns/k12437.md pl: https://steelequivalents.com/pl/materiały/uns/k12437.md pt: https://steelequivalents.com/pt/materiais/uns/k12437.md ru: https://steelequivalents.com/ru/материалы/uns/k12437.md tr: https://steelequivalents.com/tr/malzemeler/uns/k12437.md zh: https://steelequivalents.com/zh/材料/uns/k12437.md ja: https://steelequivalents.com/ja/材料/uns/k12437.md ar: https://steelequivalents.com/ar/المواد/uns/k12437.md ko: https://steelequivalents.com/ko/재료/uns/k12437.md pt-br: https://steelequivalents.com/pt-br/materiais/uns/k12437.md hi: https://steelequivalents.com/hi/सामग्री/uns/k12437.md content_hash: sha256:bc48839178c79c359269d09f5f6b941ad8fbe87feffb978ffe9175fcce784e28 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/k12437 > Canonical URL: https://steelequivalents.com/materials/uns/k12437 > 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 · 13 grades # K12437 The designation K12437 is carried by 13 different grades. Compare them on the elements that actually differ, then open the one your print means. - *Matching grades* **13** - [*Category* **Heat-resistant structural steels · 62 grades**](/categories/heat-resistant-structural-steels "Category: Heat-resistant structural steels · 62 grades") - [*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") [Search](/search "Steel grade search")[Inquiry](/inquiry "Inquiry") ## Which of the 13 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 | S% | V% | Mn% | Ni% | C% | Si% | |---|---|---|---|---|---|---|---|---|---| | [19Mn6](/materials/din-en/19mn6 "19Mn6") | [1.0473](/materials/material-no/1.0473 "1.0473") 1.0 | [Heat-resistant structural steels](/categories/heat-resistant-structural-steels "Heat-resistant structural steels") | 26 | 0,01 | ≤0,02 | 1,00-1,70 | ≤0,30 | 0,10-0,22 | ≤0,60 | | [A662Gr.A](/materials/din-en/a662gr-a "A662Gr.A") | [1.0488](/materials/material-no/1.0488 "1.0488") 1.0 | [Fine-grain structural steels](/categories/fine-grain-structural-steels "Fine-grain structural steels") | 18 | 0,015 | ≤0,05 | 0,60-1,50 | ≤0,50 | ≤0,16 | ≤0,40 | | [S355NH](/materials/din-en/s355nh "S355NH") | [1.0539](/materials/material-no/1.0539 "1.0539") 1.0 | [Fine-grain structural steels](/categories/fine-grain-structural-steels "Fine-grain structural steels") | 7 | 0,03 | ≤0,12 | 0,90-1,65 | ≤0,50 | ≤0,20 | ≤0,50 | | [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 | 0,015 | ≤0,10 | 1,10-1,70 | ≤0,50 | ≤0,18 | ≤0,50 | | [GL-A 36](/materials/din-en/gl-a-36 "GL-A 36") | [1.0583](/materials/material-no/1.0583 "1.0583") 1.0 | [Others](/categories/others "Others") | 5 | 0,035 | 0,05-0,10 | 0,90-1,60 | ≤0,40 | ≤0,18 | ≤0,50 | | [GL-D 36](/materials/din-en/gl-d-36 "GL-D 36") | [1.0584](/materials/material-no/1.0584 "1.0584") 1.0 | [Others](/categories/others "Others") | 5 | 0,035 | 0,05-0,10 | 0,90-1,60 | ≤0,40 | ≤0,18 | ≤0,50 | | [GL-E 36](/materials/din-en/gl-e-36 "GL-E 36") | [1.0589](/materials/material-no/1.0589 "1.0589") 1.0 | [Others](/categories/others "Others") | 5 | 0,035 | 0,05-0,10 | 0,90-1,60 | ≤0,40 | ≤0,18 | ≤0,50 | | [EStE 355](/materials/din-en/este-355 "EStE 355") | [1.1106](/materials/material-no/1.1106 "1.1106") 1.1 | [Fine-grain structural steels](/categories/fine-grain-structural-steels "Fine-grain structural steels") | 7 | 0,01 | ≤0,10 | 1,10-1,70 | ≤0,50 | ≤0,18 | ≤0,50 | | [P460QL2](/materials/din-en/p460ql2 "P460QL2") | [1.8864](/materials/material-no/1.8864 "1.8864") 1.8 | [Others](/categories/others "Others") | 2 | 0,005 | ≤0,08 | ≤1,70 | 1 | ≤0,18 | ≤0,50 | | [1.8902](/materials/material-no/1.8902 "1.8902") | [1.8902](/materials/material-no/1.8902 "1.8902") 1.8 | [Fine-grain structural steels](/categories/fine-grain-structural-steels "Fine-grain structural steels") | 58 | 0,025 | ≤0,20 | 1,00-1,70 | 0,8 | ≤0,20 | ≤0,60 | | [A738Gr.C](/materials/din-en/a738gr-c "A738Gr.C") | [1.8912](/materials/material-no/1.8912 "1.8912") 1.8 | [Fine-grain structural steels](/categories/fine-grain-structural-steels "Fine-grain structural steels") | 14 | 0,02 | ≤0,20 | 1,00-1,70 | 0,8 | ≤0,20 | ≤0,60 | | [P420NH](/materials/din-en/p420nh "P420NH") | [1.8932](/materials/material-no/1.8932 "1.8932") 1.8 | [Fine-grain structural steels](/categories/fine-grain-structural-steels "Fine-grain structural steels") | 5 | 0,015 | ≤0,20 | 1,00-1,70 | 1 | ≤0,20 | 0,10-0,60 | | [A 537 Class 2](/materials/din-en/a-537-class-2 "A 537 Class 2") | [1.9533](/materials/material-no/1.9533 "1.9533") 1.9 | [Others](/categories/others "Others") | 2 | 0,035 | ≤0,02 | 0,70-1,60 | 0,25 | ≤0,24 | 0,15-0,50 | ## 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")