--- title: "44 SMnPb 28 — Free cutting steels" description: "44 SMnPb 28: 1 equivalent designations across 1 standards, with the recorded chemical composition shown next to the source text." canonical: https://steelequivalents.com/materials/din-en/44-smnpb-28 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/din-en/44-smnpb-28.md cs: https://steelequivalents.com/cs/materiály/din-en/44-smnpb-28.md de: https://steelequivalents.com/de/werkstoffe/din-en/44-smnpb-28.md es: https://steelequivalents.com/es/materiales/din-en/44-smnpb-28.md fr: https://steelequivalents.com/fr/matériaux/din-en/44-smnpb-28.md hu: https://steelequivalents.com/hu/anyagok/din-en/44-smnpb-28.md it: https://steelequivalents.com/it/materiali/din-en/44-smnpb-28.md nl: https://steelequivalents.com/nl/materialen/din-en/44-smnpb-28.md pl: https://steelequivalents.com/pl/materiały/din-en/44-smnpb-28.md pt: https://steelequivalents.com/pt/materiais/din-en/44-smnpb-28.md ru: https://steelequivalents.com/ru/материалы/din-en/44-smnpb-28.md tr: https://steelequivalents.com/tr/malzemeler/din-en/44-smnpb-28.md zh: https://steelequivalents.com/zh/材料/din-en/44-smnpb-28.md ja: https://steelequivalents.com/ja/材料/din-en/44-smnpb-28.md ar: https://steelequivalents.com/ar/المواد/din-en/44-smnpb-28.md ko: https://steelequivalents.com/ko/재료/din-en/44-smnpb-28.md pt-br: https://steelequivalents.com/pt-br/materiais/din-en/44-smnpb-28.md hi: https://steelequivalents.com/hi/सामग्री/din-en/44-smnpb-28.md content_hash: sha256:50d91fb9018a9d1df0a7eccd3f3dc07b1ba4f750ecf8c935c12cea5b5c9c4ad4 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/44-smnpb-28 > Canonical URL: https://steelequivalents.com/materials/din-en/44-smnpb-28 > 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 · 1 designation # 44 SMnPb 28 44 SMnPb 28 is a material in the category [Free cutting steels](/categories/free-cutting-steels "Free cutting steels"), held under material number 1.0763. Its recorded composition includes C 0.4–0.48%, Si ≤ 0.4%, S 0.24–0.33%, Mn 1.3–1.7% and Pb 0.15–0.35%. No cross-standard equivalents are recorded for this grade yet. Recorded mechanical properties include Rm 630–1030 N/mm², A 5–7% and HB 181–242; these figures vary with the delivery condition and dimension. Its recorded density is 7.85 g/cm³. - [*Material no.* **1.0763**](/materials/material-no/1.0763 "Material no.: 1.0763") - [*Category* **Free cutting steels · 49 grades**](/categories/free-cutting-steels "Category: Free cutting steels · 49 grades") - *Designations* **1** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=6184c148-17d4-4d3d-9e7b-8893efb15496&designation=564176b8-bb63-460a-8205-a63ddb600d35 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/44-smnpb-28.pdf "Datasheet as PDF") ## About Free cutting steels Free-cutting steels are steels formulated to machine readily and produce manageable chips during cutting. Their machinability makes them suitable for turned, drilled and threaded components produced in high volumes, including small precision parts and fasteners. This describes the material class as a whole. Always confirm the individual grade against the standard before ordering. ## Chemical composition 6 elements on file · weight % What this alloy is Fe Mn C Si Iron — the balance, never listed by a standard — 97.1 % Mn — 1.5 % C — 0.4 % 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 | 0.4–0.48 | | Si | ≤ 0.4 | | Mn | 1.3–1.7 | | P | 0.06 | | S | 0.24–0.33 | | 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 | 0,40-0,48 | 0.400 | 0.480 | Range | | Si | ≤0,40 | — | 0.400 | Max | | P | 0,06 | 0.060 | 0.060 | Exact | | S | 0,24-0,33 | 0.240 | 0.330 | Range | | Mn | 1,30-1,70 | 1.300 | 1.700 | 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. ## Properties by condition 2 conditions · 11 values By thickness**Cold drawn / hard** source `steelnumber` | Thickness mm | Rm N/mm² | A% | |---|---|---| | 5 – 10 | 760 – 1030 | 5 | | 10 – 16 | 710 – 980 | 5 | | 16 – 40 | 660 – 900 | 6 | | 40 – 63 | 650 – 870 | 7 | | 63 – 100 | 630 – 840 | 7 | By delivery state**As rolled and turned** source `steelnumber` | Delivery state | HB | |---|---| | As rolled and turned | 181 – 242 | Every figure holds only for the condition on its own row. Values are never merged across conditions or across sources, never averaged, and never interpolated between two rows. An em dash means no value on file — never zero. Figures are converted to the unit in the column header; the source’s own wording is kept and shown where the two differ. ## 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. [36 SMnPb 14 1.0765 Mn 1,30-1,70 · Pb 0,15-0,35 - ΔMn 0.00 - ΔPb 0.00 - 3 designations](/materials/din-en/36-smnpb-14 "36 SMnPb 14")[38 SMnPb 28 1.0761 Mn 1,20-1,50 · Pb 0,15-0,35 - ΔMn 0.15 - ΔPb 0.00 - 1 designations](/materials/din-en/38-smnpb-28 "38 SMnPb 28")[1.0737 1.0737 Mn 1,00-1,50 · Pb 0,20-0,35 - ΔMn 0.25 - ΔPb 0.03 - 13 designations](/materials/material-no/1.0737 "1.0737")[11 SMnPbTe 37 1.0738 Mn 1,00-1,50 · Pb 0,20-0,35 - ΔMn 0.25 - ΔPb 0.03 - 1 designations](/materials/din-en/11-smnpbte-37 "11 SMnPbTe 37")[11 SMnPbBiTe 37 1.0739 Mn 1,00-1,50 · Pb 0,20-0,35 - ΔMn 0.25 - ΔPb 0.03 - 1 designations](/materials/din-en/11-smnpbbite-37 "11 SMnPbBiTe 37")[1.0718 1.0718 Mn 0,90-1,30 · Pb 0,20-0,35 - ΔMn 0.40 - ΔPb 0.03 - 21 designations](/materials/material-no/1.0718 "1.0718") ## 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=6184c148-17d4-4d3d-9e7b-8893efb15496&designation=564176b8-bb63-460a-8205-a63ddb600d35 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/44-smnpb-28.pdf "Datasheet as PDF")