--- title: "R 1200 — R 350 G 1 HT, 4 equivalent designations" description: "R 1200 in ASTM: material number 1.0631, also listed as R 350 G 1 HT. It is a material in the category Others. Designations recorded for this grade: 4." canonical: https://steelequivalents.com/materials/astm/r-1200 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/astm/r-1200.md cs: https://steelequivalents.com/cs/materiály/astm/r-1200.md de: https://steelequivalents.com/de/werkstoffe/astm/r-1200.md es: https://steelequivalents.com/es/materiales/astm/r-1200.md fr: https://steelequivalents.com/fr/matériaux/astm/r-1200.md hu: https://steelequivalents.com/hu/anyagok/astm/r-1200.md it: https://steelequivalents.com/it/materiali/astm/r-1200.md nl: https://steelequivalents.com/nl/materialen/astm/r-1200.md pl: https://steelequivalents.com/pl/materiały/astm/r-1200.md pt: https://steelequivalents.com/pt/materiais/astm/r-1200.md ru: https://steelequivalents.com/ru/материалы/astm/r-1200.md tr: https://steelequivalents.com/tr/malzemeler/astm/r-1200.md zh: https://steelequivalents.com/zh/材料/astm/r-1200.md ja: https://steelequivalents.com/ja/材料/astm/r-1200.md ar: https://steelequivalents.com/ar/المواد/astm/r-1200.md ko: https://steelequivalents.com/ko/재료/astm/r-1200.md pt-br: https://steelequivalents.com/pt-br/materiais/astm/r-1200.md hi: https://steelequivalents.com/hi/सामग्री/astm/r-1200.md content_hash: sha256:9ff93adad7800a94892acb47969a3ade97e386cf1b0e7fdbc429b5fd9eb220b0 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/astm/r-1200 > Canonical URL: https://steelequivalents.com/materials/astm/r-1200 > 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. ASTM · United States · 4 designations # R 1200 R 1200 is a designation in ASTM for the material held under material number 1.0631, also listed as R 350 G 1 HT. It is a material in the category Others. We list 4 designations recorded for this grade, in the standards DIN / EN and ASTM. - [*Material no.* **1.0631**](/materials/material-no/1.0631 "Material no.: 1.0631") - [*Category* **Others · 1754 grades**](/categories/others "Category: Others · 1754 grades") - *Designations* **4** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=69c26b46-7d35-46e7-90de-81e422fc48cc&designation=2c8e87ba-45e5-43c5-98a7-97de292fc8a3 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/astm/r-1200.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN R 350 G 1 HT This grade’s own name](/materials/din-en/r-350-g-1-ht "DIN / EN R 350 G 1 HT") ## About Others These are miscellaneous metallic alloys that do not fit a more specific material family and may be based on iron, nickel, cobalt, copper or other alloy systems. They are selected for applications requiring particular combinations of strength, hardness, toughness, wear resistance or resistance to demanding service conditions. This describes the material class as a whole. Always confirm the individual grade against the standard before ordering. ## Also known as 4 designations · 2 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 · 3 - [R 350 G 1 HT This grade’s own name](/materials/din-en/r-350-g-1-ht "DIN / EN R 350 G 1 HT") - [R 350 HAT This grade’s own name](/materials/din-en/r-350-hat "DIN / EN R 350 HAT") - [StSch 1200 This grade’s own name](/materials/din-en/stsch-1200 "DIN / EN StSch 1200") ASTM United States · 1 - **R 1200 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 14 elements on file · weight % What this alloy is Fe Mn C Si Iron — the balance, never listed by a standard — 97.4 % Mn — 1 % C — 0.8 % 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 | 0.72–0.8 | | Si | 0.15–0.58 | | Mn | 0.7–1.2 | | P | 0.02 | | S | 0.025 | | Cr | ≤ 0.15 | | Mo | ≤ 0.02 | | Ni | ≤ 0.1 | | V | ≤ 0.03 | | Cu | ≤ 0.15 | | Al | ≤ 0.004 | | Ti | ≤ 0.025 | | Nb | ≤ 0.04 | | N | 0.009 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Molybdenum Nickel Vanadium Copper Aluminium Titanium Niobium Nitrogen 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 | 0,72-0,80 | 0.720 | 0.800 | Range | | N | 0,009 | 0.009 | 0.009 | Exact | | Al | ≤0,004 | — | 0.004 | Max | | Si | 0,15-0,58 | 0.150 | 0.580 | Range | | P | 0,02 | 0.020 | 0.020 | Exact | | S | 0,025 | 0.025 | 0.025 | Exact | | Ti | ≤0,025 | — | 0.025 | Max | | V | ≤0,030 | — | 0.030 | Max | | Cr | ≤0,15 | — | 0.150 | Max | | Mn | 0,70-1,20 | 0.700 | 1.200 | Range | | Ni | ≤0,10 | — | 0.100 | Max | | Cu | ≤0,15 | — | 0.150 | Max | | Nb | ≤0,04 | — | 0.040 | Max | | Mo | ≤0,02 | — | 0.020 | 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 This grade's composition falls outside the published model's validated range (a low-alloy composition window), so no transformation temperature is predicted here. ## 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 / 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. [R 0700 1.0521 Mn 0,70-1,20 · Si 0,15-0,58 - ΔMn 0.00 - ΔSi 0.00 - 3 designations](/materials/din-en/r-0700 "R 0700")[R 0900 1.0623 Mn 0,70-1,20 · Si 0,15-0,58 - ΔMn 0.00 - ΔSi 0.00 - 3 designations](/materials/din-en/r-0900 "R 0900")[R 350 G 2 HT 1.0632 Mn 0,70-1,20 · Si 0,15-0,58 - ΔMn 0.00 - ΔSi 0.00 - 2 designations](/materials/din-en/r-350-g-2-ht "R 350 G 2 HT")[R260GHT 1.0636 Mn 0,70-1,20 · Si 0,15-0,58 - ΔMn 0.00 - ΔSi 0.00 - 1 designations](/materials/din-en/r260ght "R260GHT")[R 340 GHT 1.0638 Mn 0,70-1,20 · Si 0,15-0,58 - ΔMn 0.00 - ΔSi 0.00 - 1 designations](/materials/din-en/r-340-ght "R 340 GHT")[31Mn4 1.0520 Mn 0,80-1,10 · Si 0,20-0,50 - ΔMn 0.00 - ΔSi 0.02 - 1 designations](/materials/din-en/31mn4 "31Mn4") ## 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=69c26b46-7d35-46e7-90de-81e422fc48cc&designation=2c8e87ba-45e5-43c5-98a7-97de292fc8a3 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/astm/r-1200.pdf "Datasheet as PDF")