--- title: "422 630 — C18D, 34 equivalent designations" description: "422 630 in ČSN: material number 1.0416, also listed as C18D. It is a material in the category Others. Designations recorded for this grade: 34." canonical: https://steelequivalents.com/materials/csn/422-630 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/csn/422-630.md cs: https://steelequivalents.com/cs/materiály/csn/422-630.md de: https://steelequivalents.com/de/werkstoffe/csn/422-630.md es: https://steelequivalents.com/es/materiales/csn/422-630.md fr: https://steelequivalents.com/fr/matériaux/csn/422-630.md hu: https://steelequivalents.com/hu/anyagok/csn/422-630.md it: https://steelequivalents.com/it/materiali/csn/422-630.md nl: https://steelequivalents.com/nl/materialen/csn/422-630.md pl: https://steelequivalents.com/pl/materiały/csn/422-630.md pt: https://steelequivalents.com/pt/materiais/csn/422-630.md ru: https://steelequivalents.com/ru/материалы/csn/422-630.md tr: https://steelequivalents.com/tr/malzemeler/csn/422-630.md zh: https://steelequivalents.com/zh/材料/csn/422-630.md ja: https://steelequivalents.com/ja/材料/csn/422-630.md ar: https://steelequivalents.com/ar/المواد/csn/422-630.md ko: https://steelequivalents.com/ko/재료/csn/422-630.md pt-br: https://steelequivalents.com/pt-br/materiais/csn/422-630.md hi: https://steelequivalents.com/hi/सामग्री/csn/422-630.md content_hash: sha256:3424399b24611f08cfb50c7dc5aed3f16c6d1e841965c8399d0a8baf67d5b30a generated: 2026-09-22 --- > **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/csn/422-630 > Canonical URL: https://steelequivalents.com/materials/csn/422-630 > 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. ČSN · Czechia · 34 designations # 422 630 422 630 is a designation in ČSN for the material held under material number 1.0416, also listed as C18D. It is a material in the category Others. We list 34 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, BS, AFNOR, ISO, JIS, GB, GOST, UNI, SS, ČSN, PN, MSZ, STAS, BDS, ÖNORM and CNS. - [*Material no.* **1.0416**](/materials/material-no/1.0416 "Material no.: 1.0416") - [*Category* **Others · 1754 grades**](/categories/others "Category: Others · 1754 grades") - *Designations* **34** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=5b097473-076a-475a-a977-ec5e7071d1ab&designation=cbfc0baf-7636-4f71-b7d8-52438d843e8f "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/csn/422-630.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN C18D This grade’s own name](/materials/din-en/c18d "DIN / EN C18D") - [UNS G10170 This grade’s own name · 4 grades on that route](/materials/uns/g10170 "UNS G10170") - [AISI / SAE 1017 This grade’s own name · 5 grades on that route](/materials/aisi-sae/1017 "AISI / SAE 1017") ## 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 34 designations · 18 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 - [C18D This grade’s own name](/materials/din-en/c18d "DIN / EN C18D") - [GS38 Indicative](/materials/din-en/gs-38 "DIN / EN GS38") UNS United States · 1 - [G10170 This grade’s own name](/materials/uns/g10170 "UNS G10170") AISI / SAE United States · 3 - [1017 This grade’s own name](/materials/aisi-sae/1017 "AISI / SAE 1017") - [Gr.N1 Indicative](/materials/aisi-sae/gr-n1 "AISI / SAE Gr.N1") - [J01700 Indicative](/materials/aisi-sae/j01700 "AISI / SAE J01700") BS United Kingdom · 3 - [AM1 Indicative](/materials/bs/am1 "BS AM1") - [AW1 Indicative](/materials/bs/aw1 "BS AW1") - [CLA9 Indicative](/materials/bs/cla9 "BS CLA9") AFNOR France · 2 - [20-40M Indicative](/materials/afnor/20-40m "AFNOR 20-40M") - [E20-40M Indicative](/materials/afnor/e20-40m "AFNOR E20-40M") ISO International · 2 - [20-40 Indicative](/materials/iso/20-40 "ISO 20-40") - [200-400 Indicative](/materials/iso/200-400 "ISO 200-400") JIS Japan · 3 - [S17C Indicative](/materials/jis/s17c "JIS S17C") - [SC360 Indicative](/materials/jis/sc360 "JIS SC360") - [SC37 Indicative](/materials/jis/sc37 "JIS SC37") GB China · 2 - [15 Indicative](/materials/gb/15 "GB 15") - [ZG200-400 Indicative](/materials/gb/zg200-400 "GB ZG200-400") GOST Russia / CIS · 1 - [15L Indicative](/materials/gost/15l "GOST 15L") UNI Italy · 2 - [FeG400 Indicative](/materials/uni/feg400 "UNI FeG400") - [FeG42 Indicative](/materials/uni/feg42 "UNI FeG42") SS Sweden · 1 - [1035 Indicative](/materials/aisi-sae/1035 "SS 1035") ČSN Czechia · 2 - **422 630 Indicative** - [422 633 Indicative](/materials/csn/422-633 "ČSN 422 633") PN Poland · 2 - [L400 Indicative](/materials/pn/l400 "PN L400") - [LII400 Indicative](/materials/pn/lii400 "PN LII400") MSZ Hungary · 2 - [Ao400 Indicative](/materials/msz/ao400 "MSZ Ao400") - [Ao400FK Indicative](/materials/msz/ao400fk "MSZ Ao400FK") STAS Romania · 2 - [OT400-1 Indicative](/materials/stas/ot400-1 "STAS OT400-1") - [OT400-3 Indicative](/materials/stas/ot400-3 "STAS OT400-3") BDS Bulgaria · 2 - [15LI Indicative](/materials/bds/15li "BDS 15LI") - [15LII Indicative](/materials/bds/15lii "BDS 15LII") ÖNORM Austria · 1 - [GS38 Indicative](/materials/din-en/gs-38 "ÖNORM GS38") CNS Taiwan · 1 - [SC(37)C Indicative](/materials/cns/sc-37-c "CNS SC(37)C") Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Chemical composition 10 elements on file · weight % What this alloy is Fe Mn Si Cu Iron — the balance, never listed by a standard — 98.2 % Mn — 0.4 % Si — 0.3 % Cu — 0.3 % Traces & impurities · 0.8 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.15–0.2 | | Si | ≤ 0.3 | | Mn | 0.3–0.6 | | P | 0.035 | | S | 0.035 | | Cr | ≤ 0.2 | | Mo | ≤ 0.05 | | Ni | ≤ 0.25 | | Cu | ≤ 0.3 | | Al | ≤ 0.01 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Molybdenum Nickel Copper Aluminium 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 | 0,15-0,20 | 0.150 | 0.200 | Range | | Al | ≤0,01 | — | 0.010 | Max | | Si | ≤0,30 | — | 0.300 | Max | | P | 0,035 | 0.035 | 0.035 | Exact | | S | 0,035 | 0.035 | 0.035 | Exact | | Cr | ≤0,20 | — | 0.200 | Max | | Mn | 0,30-0,60 | 0.300 | 0.600 | Range | | Ni | ≤0,25 | — | 0.250 | Max | | Cu | ≤0,30 | — | 0.300 | Max | | Mo | ≤0,05 | — | 0.050 | 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 819 °C Predicted Ae1 722 °C Predicted Acm 423 °C Predicted Bs 592 °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 Transformation point Ac1 735 °C Exact Transformation point Ac3 863 °C Exact · Ac3(Acm) Transformation point Ar3 840 °C Exact · Ar3(Arcm) Transformation point Ar1 685 °C Exact Weldability readily weldable As published: without limitations. Flake sensitivity not susceptible As published: not predisposed Temper brittleness not susceptible As published: not predisposed 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 · 18 values By dimension**Normalizing 910 - 930°C,Drawing 670 - 690°C** source `splav` | Dimension mm | Rm N/mm² | Re N/mm² | A5% | Z% | KCU kJ/m² | |---|---|---|---|---|---| | to 100 | 392 | 196 | 24 | 35 | 491 | At temperature**no delivery state stated** source `splav` | Temperature °C | Density g/cm³ | Thermal expansion coefficient 10^-6/K | Thermal conductivity W/(m·K) | Specific heat capacity J/(kg·K) | |---|---|---|---|---| | 20 | 7.82 | — | — | — | | 100 | — | 11.9 | 78 | 470 | | 200 | — | 12.5 | 67 | 479 | | 400 | — | 13.6 | 48 | 517 | | 500 | — | 14.2 | 41 | — | | 600 | — | — | — | 571 | 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. [C15D 1.0413 Mn 0,30-0,60 · Si ≤0,30 - ΔMn 0.00 - ΔSi 0.00 - 4 designations](/materials/din-en/c15d "C15D")[C22GPb 1.0404 Mn 0,30-0,60 · Si ≤0,40 - ΔMn 0.00 - ΔSi 0.05 - 2 designations](/materials/din-en/c22gpb "C22GPb")[1.0961 1.0598 Mn ≤1,00 · Si ≤0,40 - ΔMn 0.05 - ΔSi 0.05 - 2 designations](/materials/material-no/1.0961 "1.0961")[C10Wsi 1.0351 Mn 0,38-0,57 · Si ≤0,12 - ΔMn 0.03 - ΔSi 0.09 - 2 designations](/materials/din-en/c10wsi "C10Wsi")[P195GH 1.0348 Mn ≤0,70 · Si ≤0,35 - ΔMn 0.10 - ΔSi 0.02 - 2 designations](/materials/din-en/p195gh "P195GH")[C46 1.0526 Mn ≤1,00 · Si 0,03-0,50 - ΔMn 0.05 - ΔSi 0.12 - 1 designations](/materials/din-en/c46 "C46") ## 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=5b097473-076a-475a-a977-ec5e7071d1ab&designation=cbfc0baf-7636-4f71-b7d8-52438d843e8f "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/csn/422-630.pdf "Datasheet as PDF")