--- title: "1.0108 — Unalloyed structural steels" description: "1.0108 is the material number of the grade also listed as P195TR2. Category: Unalloyed structural steels. Designations recorded for this grade: 1." canonical: https://steelequivalents.com/materials/material-no/1.0108 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/material-no/1.0108.md cs: https://steelequivalents.com/cs/materiály/číslo-materiálu/1.0108.md de: https://steelequivalents.com/de/werkstoffe/werkstoff-nr/1.0108.md es: https://steelequivalents.com/es/materiales/número-de-material/1.0108.md fr: https://steelequivalents.com/fr/matériaux/numéro-de-matériau/1.0108.md hu: https://steelequivalents.com/hu/anyagok/anyagszám/1.0108.md it: https://steelequivalents.com/it/materiali/numero-materiale/1.0108.md nl: https://steelequivalents.com/nl/materialen/materiaalnummer/1.0108.md pl: https://steelequivalents.com/pl/materiały/numer-materiału/1.0108.md pt: https://steelequivalents.com/pt/materiais/número-do-material/1.0108.md ru: https://steelequivalents.com/ru/материалы/номер-материала/1.0108.md tr: https://steelequivalents.com/tr/malzemeler/malzeme-numarası/1.0108.md zh: https://steelequivalents.com/zh/材料/材料编号/1.0108.md ja: https://steelequivalents.com/ja/材料/材料番号/1.0108.md ar: https://steelequivalents.com/ar/المواد/رقم-المادة/1.0108.md ko: https://steelequivalents.com/ko/재료/재료번호/1.0108.md pt-br: https://steelequivalents.com/pt-br/materiais/número-do-material/1.0108.md hi: https://steelequivalents.com/hi/सामग्री/सामग्री-संख्या/1.0108.md content_hash: sha256:395e3a76f0ca175e5b5cc404474dcca7f55ab4f1bb02321f4c9da62b0a87395a 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/1.0108 > Canonical URL: https://steelequivalents.com/materials/material-no/1.0108 > 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 · 1 designation # 1.0108 1.0108 is the material number of the grade also listed as P195TR2. It is a material in the category Unalloyed structural steels. We list 1 designations recorded for this grade, in the standards DIN / EN. - ***Material no.* **1.0108**** - [*Category* **Unalloyed structural steels · 452 grades**](/categories/unalloyed-structural-steels "Category: Unalloyed structural steels · 452 grades") - *Designations* **1** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=72c24851-b459-41bf-98e2-231259b9813e "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/material-no/1.0108.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN P195TR2 This grade’s own name](/materials/din-en/p195tr2 "DIN / EN P195TR2") ## About Unalloyed structural steels Unalloyed structural steels include all low-carbon steels in which the iron companions do not exceed specified minimum values. The yield strength, formability and weldability are the decisive factors for their use. They are soft, pliable, tough and stretchy, but cannot be hardened by heat treatment. This describes the material class as a whole. Always confirm the individual grade against the standard before ordering. ## Also known as 1 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 · 1 - [P195TR2 This grade’s own name](/materials/din-en/p195tr2 "DIN / EN P195TR2") Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Chemical composition 13 elements on file · weight % What this alloy is Fe Mn Si Cr Iron — the balance, never listed by a standard — 97.7 % Mn — 0.7 % Si — 0.4 % Cr — 0.3 % Traces & impurities · 0.9 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | ≤ 0.13 | | Si | ≤ 0.35 | | Mn | ≤ 0.7 | | P | 0.025 | | S | 0.02 | | Cr | ≤ 0.3 | | Mo | ≤ 0.08 | | Ni | ≤ 0.3 | | V | ≤ 0.02 | | Cu | ≤ 0.3 | | Al | ≥ 0.02 | | Ti | ≤ 0.04 | | Nb | ≤ 0.01 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Molybdenum Nickel Vanadium Copper Aluminium Titanium Niobium 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 | ≤0,13 | — | 0.130 | Max | | Al | ≥0,020 | 0.020 | — | Min | | Si | ≤0,35 | — | 0.350 | Max | | P | 0,025 | 0.025 | 0.025 | Exact | | S | 0,02 | 0.020 | 0.020 | Exact | | Ti | ≤0,04 | — | 0.040 | Max | | V | ≤0,02 | — | 0.020 | Max | | Cr | ≤0,30 | — | 0.300 | Max | | Mn | ≤0,70 | — | 0.700 | Max | | Ni | ≤0,30 | — | 0.300 | Max | | Cu | ≤0,30 | — | 0.300 | Max | | Nb | ≤0,010 | — | 0.010 | Max | | Mo | ≤0,08 | — | 0.080 | 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 computed from composition · °C Predicted Ae3 831 °C Predicted Ae1 724 °C Predicted Acm 369 °C Predicted Bs 587 °C These four temperatures are a CALCULATION from this grade's own composition, using the published Li, Niebuhr, Meekisho & Atteridge (1998) model — never a measurement, and computed from the UPPER BOUND of each element's specified range, not a mid-range figure. Where this grade also has a measured transformation point (Ac1, Ac3, Ar1, Ar3) on file, it is shown separately, in Physical & mechanical properties, and is never replaced by the predicted figures here — Ae (predicted, equilibrium) and Ac/Ar (measured, on heating or cooling) are different physical quantities and can differ by tens of degrees; a mismatch between the two is not an error in either. ## 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 1 conditions · 3 values By thickness**no delivery state stated** source `steelnumber` | Thickness mm | ReH N/mm² | |---|---| | ≤ 16 | 195 | | 16 – 40 | 185 | | 40 – 60 | 175 | 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 / Si 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. [E190 1.0031 Mn ≤0,70 · Si ≤0,35 - ΔMn 0.00 - ΔSi 0.00 - 1 designations](/materials/din-en/e190 "E190")[E155 1.0033 Mn ≤0,70 · Si ≤0,35 - ΔMn 0.00 - ΔSi 0.00 - 6 designations](/materials/din-en/e155 "E155")[E195 1.0034 Mn ≤0,70 · Si ≤0,35 - ΔMn 0.00 - ΔSi 0.00 - 32 designations](/materials/din-en/e195 "E195")[P195TR1 1.0107 Mn ≤0,70 · Si ≤0,35 - ΔMn 0.00 - ΔSi 0.00 - 1 designations](/materials/din-en/p195tr1 "P195TR1")[E220 1.0215 Mn ≤0,70 · Si ≤0,35 - ΔMn 0.00 - ΔSi 0.00 - 3 designations](/materials/din-en/e220 "E220")[RSt 42-2 1.0042 Mn 0,20-0,50 · Si 0,03-0,30 - ΔMn 0.00 - ΔSi 0.01 - 6 designations](/materials/din-en/rst42-2 "RSt 42-2") ## 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=72c24851-b459-41bf-98e2-231259b9813e "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/material-no/1.0108.pdf "Datasheet as PDF")