--- title: "1.3523 — Case hardening steels" description: "1.3523 is the material number of the grade also listed as 19 Mn Cr 5. Category: Case hardening steels. Designations recorded for this grade: 16." canonical: https://steelequivalents.com/materials/material-no/1.3523 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/material-no/1.3523.md cs: https://steelequivalents.com/cs/materiály/číslo-materiálu/1.3523.md de: https://steelequivalents.com/de/werkstoffe/werkstoff-nr/1.3523.md es: https://steelequivalents.com/es/materiales/número-de-material/1.3523.md fr: https://steelequivalents.com/fr/matériaux/numéro-de-matériau/1.3523.md hu: https://steelequivalents.com/hu/anyagok/anyagszám/1.3523.md it: https://steelequivalents.com/it/materiali/numero-materiale/1.3523.md nl: https://steelequivalents.com/nl/materialen/materiaalnummer/1.3523.md pl: https://steelequivalents.com/pl/materiały/numer-materiału/1.3523.md pt: https://steelequivalents.com/pt/materiais/número-do-material/1.3523.md ru: https://steelequivalents.com/ru/материалы/номер-материала/1.3523.md tr: https://steelequivalents.com/tr/malzemeler/malzeme-numarası/1.3523.md zh: https://steelequivalents.com/zh/材料/材料编号/1.3523.md ja: https://steelequivalents.com/ja/材料/材料番号/1.3523.md ar: https://steelequivalents.com/ar/المواد/رقم-المادة/1.3523.md ko: https://steelequivalents.com/ko/재료/재료번호/1.3523.md pt-br: https://steelequivalents.com/pt-br/materiais/número-do-material/1.3523.md hi: https://steelequivalents.com/hi/सामग्री/सामग्री-संख्या/1.3523.md content_hash: sha256:cddf36e1514a38bbe9659d5494ef87b1d254d2a7fa98f3b6cfc0a5df9db3d2a2 generated: 2026-09-24 --- > **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/material-no/1.3523 > Canonical URL: https://steelequivalents.com/materials/material-no/1.3523 > 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. Material number · Europe · 16 designations # 1.3523 1.3523 is the material number of the grade also listed as 19 Mn Cr 5. It is a material in the category Case hardening steels. We list 16 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, ISO, JIS, GB, GOST, ČSN and STN. - ***Material no.* **1.3523**** - [*Category* **Case hardening steels · 60 grades**](/categories/case-hardening-steels "Category: Case hardening steels · 60 grades") - [*Category* **Others · 1754 grades**](/categories/others "Category: Others · 1754 grades") - *Designations* **16** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=11c1d0f8-d9a3-44a7-b6e1-502491e46636 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/material-no/1.3523.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN 19 Mn Cr 5 This grade’s own name](/materials/din-en/19mncr5 "DIN / EN 19 Mn Cr 5") - [UNS G51200 This grade’s own name · 7 grades on that route](/materials/uns/g51200 "UNS G51200") - [AISI / SAE 5120 This grade’s own name · 5 grades on that route](/materials/aisi-sae/5120 "AISI / SAE 5120") ## About Case hardening steels Case hardening steels are steels designed to develop a hard, wear-resistant surface while retaining a tough and ductile core. They are used for components such as gears, shafts and other machine parts exposed to contact wear and cyclic loading. This describes the material class as a whole. Always confirm the individual grade against the standard before ordering. ## Also known as 16 designations · 9 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 · 2 - [19 Mn Cr 5 This grade’s own name](/materials/din-en/19mncr5 "DIN / EN 19 Mn Cr 5") - [19MnCr5 This grade’s own name](/materials/din-en/19mncr5 "DIN / EN 19MnCr5") UNS United States · 2 - [G51200 This grade’s own name](/materials/uns/g51200 "UNS G51200") - [H51200 This grade’s own name](/materials/uns/h51200 "UNS H51200") AISI / SAE United States · 2 - [5120 This grade’s own name](/materials/aisi-sae/5120 "AISI / SAE 5120") - [5120H This grade’s own name](/materials/aisi-sae/5120h "AISI / SAE 5120H") ISO International · 3 - [20Cr4 Indicative](/materials/din-en/20cr4 "ISO 20Cr4") - [20Cr4H Indicative](/materials/iso/20cr4h "ISO 20Cr4H") - [20CrS4 Indicative](/materials/din-en/20crs4 "ISO 20CrS4") JIS Japan · 2 - [SCr420 Indicative](/materials/jis/scr420 "JIS SCr420") - [SCr420H Indicative](/materials/jis/scr420h "JIS SCr420H") GB China · 1 - [20CrH Indicative](/materials/gb/20crh "GB 20CrH") GOST Russia / CIS · 2 - [20X Indicative](/materials/gost/20x "GOST 20X") - [ст.20X Indicative](/materials/gost/st-20x "GOST ст.20X") ČSN Czechia · 1 - [14221 Indicative](/materials/csn/14221 "ČSN 14221") STN Slovakia · 1 - [14 221 Indicative](/materials/csn/14221 "STN 14 221") Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Chemical composition 9 elements on file · weight % What this alloy is Fe Mn Cr Si Iron — the balance, never listed by a standard — 96.6 % Mn — 1.3 % Cr — 1.2 % Si — 0.4 % Traces & impurities · 0.6 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.17–0.22 | | Si | ≤ 0.4 | | Mn | 1.1–1.4 | | P | 0.025 | | S | 0.015 | | Cr | 1.1–1.3 | | Cu | ≤ 0.3 | | Al | ≤ 0.05 | | O | ≤ 0.002 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Copper Aluminium Oxygen 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 | |---|---|---|---|---| | C | 0,17-0,22 | 0.170 | 0.220 | Range | | O | ≤0,0020 | — | 0.002 | Max | | Al | ≤0,050 | — | 0.050 | Max | | Si | ≤0,40 | — | 0.400 | Max | | P | 0,025 | 0.025 | 0.025 | Exact | | S | 0,015 | 0.015 | 0.015 | Exact | | Cr | 1,10-1,30 | 1.100 | 1.300 | Range | | Mn | 1,10-1,40 | 1.100 | 1.400 | Range | | Cu | ≤0,30 | — | 0.300 | Max | 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 1.3, 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. [100CrMnSi4-4 1.3518 Mn 0,90-1,20 · Cr 0,90-1,20 - ΔMn 0.20 - ΔCr 0.15 - 2 designations](/materials/din-en/100crmnsi4-4 "100CrMnSi4-4")[17MnCr5 1.3521 Mn 1,00-1,30 · Cr 0,80-1,10 - ΔMn 0.10 - ΔCr 0.25 - 3 designations](/materials/din-en/17mncr5 "17MnCr5")[15NiMoCrB4-5 1.3421 Mn 0,60-1,30 · Cr 0,40-1,10 - ΔMn 0.30 - ΔCr 0.45 - 1 designations](/materials/din-en/15nimocrb4-5 "15NiMoCrB4-5") ## 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=11c1d0f8-d9a3-44a7-b6e1-502491e46636 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/material-no/1.3523.pdf "Datasheet as PDF")