--- title: "C15Pb — Case hardening steels" description: "C15Pb in DIN / EN: material number 1.0403, also listed as C15GPb. Category: Case hardening steels. Designations recorded for this grade: 2." canonical: https://steelequivalents.com/materials/din-en/c15pb language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/din-en/c15pb.md cs: https://steelequivalents.com/cs/materiály/din-en/c15pb.md de: https://steelequivalents.com/de/werkstoffe/din-en/c15pb.md es: https://steelequivalents.com/es/materiales/din-en/c15pb.md fr: https://steelequivalents.com/fr/matériaux/din-en/c15pb.md hu: https://steelequivalents.com/hu/anyagok/din-en/c15pb.md it: https://steelequivalents.com/it/materiali/din-en/c15pb.md nl: https://steelequivalents.com/nl/materialen/din-en/c15pb.md pl: https://steelequivalents.com/pl/materiały/din-en/c15pb.md pt: https://steelequivalents.com/pt/materiais/din-en/c15pb.md ru: https://steelequivalents.com/ru/материалы/din-en/c15pb.md tr: https://steelequivalents.com/tr/malzemeler/din-en/c15pb.md zh: https://steelequivalents.com/zh/材料/din-en/c15pb.md ja: https://steelequivalents.com/ja/材料/din-en/c15pb.md ar: https://steelequivalents.com/ar/المواد/din-en/c15pb.md ko: https://steelequivalents.com/ko/재료/din-en/c15pb.md pt-br: https://steelequivalents.com/pt-br/materiais/din-en/c15pb.md hi: https://steelequivalents.com/hi/सामग्री/din-en/c15pb.md content_hash: sha256:8ee1c79cfa111b8f4485bab472f5624e970d7829081d8d037a22d2584ee25e19 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/din-en/c15pb > Canonical URL: https://steelequivalents.com/materials/din-en/c15pb > 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. DIN / EN · Europe · 2 designations # C15Pb C15Pb is a designation in DIN / EN for the material held under material number 1.0403, also listed as C15GPb. It is a material in the category Case hardening steels. We list 2 designations recorded for this grade, in the standards DIN / EN. - [*Material no.* **1.0403**](/materials/material-no/1.0403 "Material no.: 1.0403") - [*Category* **Case hardening steels · 60 grades**](/categories/case-hardening-steels "Category: Case hardening steels · 60 grades") - *Designations* **2** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=ec17a608-aa5b-4b22-b74a-1eac7714fd48&designation=3f0bcc95-529b-42b3-965d-ad0e53b276e7 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/c15pb.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN C15GPb This grade’s own name](/materials/din-en/c15gpb "DIN / EN C15GPb") ## 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 2 designations · 1 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 - [C15GPb This grade’s own name](/materials/din-en/c15gpb "DIN / EN C15GPb") - **C15Pb This grade’s own name** Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Chemical composition 6 elements on file · weight % What this alloy is Fe Mn Si Pb Iron — the balance, never listed by a standard — 98.6 % Mn — 0.6 % Si — 0.4 % Pb — 0.3 % Traces & impurities · 0.2 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.12–0.18 | | Si | ≤ 0.4 | | Mn | 0.3–0.8 | | P | 0.045 | | S | 0.045 | | Pb | 0.15–0.35 | Carbon Silicon Manganese Phosphorus Sulfur Lead 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 | 0,12-0,18 | 0.120 | 0.180 | Range | | Si | ≤0,40 | — | 0.400 | Max | | P | 0,045 | 0.045 | 0.045 | Exact | | S | 0,045 | 0.045 | 0.045 | Exact | | Mn | 0,30-0,80 | 0.300 | 0.800 | Range | | Pb | 0,15-0,35 | 0.150 | 0.350 | 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, Cr, 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 1.0, a shared category, and a published range for Mn / Pb 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. [C10GPb 1.0302 Mn 0,30-0,60 · Pb 0,15-0,35 - ΔMn 0.10 - ΔPb 0.00 - 2 designations](/materials/din-en/c10gpb "C10GPb") ## 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=ec17a608-aa5b-4b22-b74a-1eac7714fd48&designation=3f0bcc95-529b-42b3-965d-ad0e53b276e7 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/c15pb.pdf "Datasheet as PDF")