--- title: "G50501 — Spring steels" description: "G50501 in UNS: material number 1.7138, also listed as 52MnCrB3. It is a material in the category Spring steels. Designations recorded for this grade: 9." canonical: https://steelequivalents.com/materials/uns/g50501 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/uns/g50501.md cs: https://steelequivalents.com/cs/materiály/uns/g50501.md de: https://steelequivalents.com/de/werkstoffe/uns/g50501.md es: https://steelequivalents.com/es/materiales/uns/g50501.md fr: https://steelequivalents.com/fr/matériaux/uns/g50501.md hu: https://steelequivalents.com/hu/anyagok/uns/g50501.md it: https://steelequivalents.com/it/materiali/uns/g50501.md nl: https://steelequivalents.com/nl/materialen/uns/g50501.md pl: https://steelequivalents.com/pl/materiały/uns/g50501.md pt: https://steelequivalents.com/pt/materiais/uns/g50501.md ru: https://steelequivalents.com/ru/материалы/uns/g50501.md tr: https://steelequivalents.com/tr/malzemeler/uns/g50501.md zh: https://steelequivalents.com/zh/材料/uns/g50501.md ja: https://steelequivalents.com/ja/材料/uns/g50501.md ar: https://steelequivalents.com/ar/المواد/uns/g50501.md ko: https://steelequivalents.com/ko/재료/uns/g50501.md pt-br: https://steelequivalents.com/pt-br/materiais/uns/g50501.md hi: https://steelequivalents.com/hi/सामग्री/uns/g50501.md content_hash: sha256:332bc624249cd4e636b238c423b6576cbefd1f1edd6a6d2339e258e8b7f18296 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/g50501 > Canonical URL: https://steelequivalents.com/materials/uns/g50501 > 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 · 9 designations # G50501 G50501 is a designation in UNS for the material held under material number 1.7138, also listed as 52MnCrB3. It is a material in the category Spring steels. We list 9 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, ISO and JIS. - [*Material no.* **1.7138**](/materials/material-no/1.7138 "Material no.: 1.7138") - [*Category* **Spring steels · 52 grades**](/categories/spring-steels "Category: Spring steels · 52 grades") - *Designations* **9** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=1455c274-2eb9-4b54-8af6-f9000a746356&designation=36581796-4021-4a9d-9278-020f0a8fc4cf "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/uns/g50501.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN 52MnCrB3 This grade’s own name](/materials/din-en/52mncrb3 "DIN / EN 52MnCrB3") - [UNS H50501 This grade’s own name](/materials/uns/h50501 "UNS H50501") - [AISI / SAE 50B50 This grade’s own name](/materials/aisi-sae/50b50 "AISI / SAE 50B50") ## About Spring steels Spring steels are alloy steels designed to store and release elastic energy repeatedly without permanent deformation. They are characterised by a combination of strength, hardness and resilience, making them suitable for springs, clips, washers and other components subjected to repeated flexing or shock. This describes the material class as a whole. Always confirm the individual grade against the standard before ordering. ## Also known as 9 designations · 5 standards · nothing hidden 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. DIN / EN Europe · 1 - [52MnCrB3 This grade’s own name](/materials/din-en/52mncrb3 "DIN / EN 52MnCrB3") UNS United States · 3 - **G50501 This grade’s own name** - [G51601 Indicative](/materials/uns/g51601 "UNS G51601") - [H50501 This grade’s own name](/materials/uns/h50501 "UNS H50501") AISI / SAE United States · 3 - [50B50 This grade’s own name](/materials/aisi-sae/50b50 "AISI / SAE 50B50") - [50B50H This grade’s own name](/materials/aisi-sae/50b50h "AISI / SAE 50B50H") - [51B60 Indicative](/materials/aisi-sae/51b60 "AISI / SAE 51B60") ISO International · 1 - [60CrB3 Indicative](/materials/iso/60crb3 "ISO 60CrB3") JIS Japan · 1 - [SUP11A Indicative](/materials/jis/sup11a "JIS SUP11A") Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Chemical composition 7 elements on file · weight % What this alloy is Fe Mn C Cr Iron — the balance, never listed by a standard — 97.8 % Mn — 0.9 % C — 0.5 % Cr — 0.5 % Traces & impurities · 0.3 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.48–0.55 | | Si | 0.15–0.35 | | Mn | 0.75–1 | | P | 0.035 | | S | 0.035 | | Cr | 0.4–0.6 | | B | ≥ 0.0008 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Boron 0.01 % 0.1 % 1 % 10 % 100 % The scale is logarithmic, not the element’s raw share of the alloy — the only honest way to fit 0.01 % and 100 % in one picture, and it means every value here can be compared with every other. | Element | As published source text, verbatim | Min% by weight | Max% by weight | Bound | |---|---|---|---|---| | B | ≥0,0008 | 0.001 | — | Min | | C | 0,48-0,55 | 0.480 | 0.550 | Range | | Si | 0,15-0,35 | 0.150 | 0.350 | Range | | P | 0,035 | 0.035 | 0.035 | Exact | | S | 0,035 | 0.035 | 0.035 | Exact | | Cr | 0,40-0,60 | 0.400 | 0.600 | Range | | Mn | 0,75-1,00 | 0.750 | 1.000 | Range | The published column is the source string byte-for-byte, decimal comma and all; Min and Max are the parsed bounds. Elements not listed have no value on file — they are omitted, never inferred. ## Predicted transformation temperatures Not enough recorded composition to predict a transformation temperature for this grade — missing: Ni, Mo. ## Physical & mechanical properties Density 7,85 g/cm³ Exact An absent property means we hold no value for it — it is left out rather than estimated, interpolated from a neighbouring grade, or filled from a handbook. It does not mean the property is undefined for the material. ## Similar grades — and why Selection rule, stated so you can disagree with it: same number class 1.7, a shared category, and a published range for Mn / Cr that overlaps this grade’s. These are neighbours in composition space — they are not equivalents, and none is claimed to be interchangeable with this grade. [56SiCr7 1.7106 Mn 0,70-1,00 · Cr 0,20-0,45 - ΔMn 0.03 - ΔCr 0.18 - 3 designations](/materials/din-en/56sicr7 "56SiCr7")[61SiCr7 1.7108 Mn 0,70-1,00 · Cr 0,20-0,45 - ΔMn 0.03 - ΔCr 0.18 - 20 designations](/materials/din-en/61sicr7 "61SiCr7")[55SiCr6-3 1.7104 Mn 0,50-0,90 · Cr 0,50-0,80 - ΔMn 0.18 - ΔCr 0.15 - 4 designations](/materials/din-en/55sicr6-3 "55SiCr6-3")[54SiCr6 1.7102 Mn 0,50-0,80 · Cr 0,50-0,80 - ΔMn 0.22 - ΔCr 0.15 - 32 designations](/materials/din-en/54sicr6 "54SiCr6") ## Looking for this grade under another name? 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?material=1455c274-2eb9-4b54-8af6-f9000a746356&designation=36581796-4021-4a9d-9278-020f0a8fc4cf "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/uns/g50501.pdf "Datasheet as PDF")