--- title: "Č.4770.1 — Stainless steels" description: "Č.4770.1 in SRPS: material number 1.4105, also listed as X4CrMoS18. Category: Stainless steels. Designations recorded for this grade: 25." canonical: https://steelequivalents.com/materials/srps/c-4770-1 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/srps/c-4770-1.md cs: https://steelequivalents.com/cs/materiály/srps/c-4770-1.md de: https://steelequivalents.com/de/werkstoffe/srps/c-4770-1.md es: https://steelequivalents.com/es/materiales/srps/c-4770-1.md fr: https://steelequivalents.com/fr/matériaux/srps/c-4770-1.md hu: https://steelequivalents.com/hu/anyagok/srps/c-4770-1.md it: https://steelequivalents.com/it/materiali/srps/c-4770-1.md nl: https://steelequivalents.com/nl/materialen/srps/c-4770-1.md pl: https://steelequivalents.com/pl/materiały/srps/c-4770-1.md pt: https://steelequivalents.com/pt/materiais/srps/c-4770-1.md ru: https://steelequivalents.com/ru/материалы/srps/c-4770-1.md tr: https://steelequivalents.com/tr/malzemeler/srps/c-4770-1.md zh: https://steelequivalents.com/zh/材料/srps/c-4770-1.md ja: https://steelequivalents.com/ja/材料/srps/c-4770-1.md ar: https://steelequivalents.com/ar/المواد/srps/c-4770-1.md ko: https://steelequivalents.com/ko/재료/srps/c-4770-1.md pt-br: https://steelequivalents.com/pt-br/materiais/srps/c-4770-1.md hi: https://steelequivalents.com/hi/सामग्री/srps/c-4770-1.md content_hash: sha256:bec6e7e78c0fdff7e1249bccd8203bb8daba484ade520829f194b90e1c6a8c65 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/srps/c-4770-1 > Canonical URL: https://steelequivalents.com/materials/srps/c-4770-1 > 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. SRPS · Serbia · 25 designations # Č.4770.1 Č.4770.1 is a designation in SRPS for the material held under material number 1.4105, also listed as X4CrMoS18. It is a material in the category Stainless steels. We list 25 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, ASTM, AFNOR, UNE, JIS, GB, UNI, SRPS and JUS. - [*Material no.* **1.4105**](/materials/material-no/1.4105 "Material no.: 1.4105") - [*Category* **Stainless steels · 468 grades**](/categories/stainless-steels "Category: Stainless steels · 468 grades") - *Designations* **25** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=fc8ae578-a010-4fd0-af77-db55419385dc&designation=03d452b3-4488-4a7a-ae3f-7170540efd1d "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/srps/c-4770-1.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN X6CrMoS17 This grade’s own name](/materials/din-en/x6crmos17 "DIN / EN X6CrMoS17") ## About Stainless steels Stainless steels are corrosion-resistant alloy steels whose chromium content promotes a protective passive surface film. They are used for equipment, structures and components exposed to moisture, chemicals or hygienic service, with different alloy compositions selected for corrosion resistance, strength, formability or weldability. This describes the material class as a whole. Always confirm the individual grade against the standard before ordering. ## Also known as 25 designations · 11 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 - [X4CrMoS18 This grade’s own name Withdrawn](/materials/din-en/x4crmos18 "DIN / EN X4CrMoS18") - [X6CrMoS17 This grade’s own name](/materials/din-en/x6crmos17 "DIN / EN X6CrMoS17") UNS United States · 1 - [S43020 Indicative](/materials/uns/s43020 "UNS S43020") AISI / SAE United States · 3 - [430F Indicative](/materials/aisi-sae/430f "AISI / SAE 430F") - [51430F Indicative](/materials/aisi-sae/51430f "AISI / SAE 51430F") - [S43020 Indicative](/materials/uns/s43020 "AISI / SAE S43020") ASTM United States · 11 - [A314 Indicative](/materials/astm/a314 "ASTM A314") - [A473 Indicative](/materials/astm/a473 "ASTM A473") - [A581 Indicative](/materials/astm/a581 "ASTM A581") - [A582 Indicative](/materials/astm/a582 "ASTM A582") - [A895 Indicative](/materials/astm/a895 "ASTM A895") - [F2281 Indicative](/materials/astm/f2281 "ASTM F2281") - [F593 Indicative](/materials/astm/f593 "ASTM F593") - [F594 Indicative](/materials/astm/f594 "ASTM F594") - [F738 Indicative](/materials/astm/f738 "ASTM F738") - [F836 Indicative](/materials/astm/f836 "ASTM F836") - [F899 Indicative](/materials/astm/f899 "ASTM F899") AFNOR France · 2 - [Z13CF17 Indicative](/materials/afnor/z13cf17 "AFNOR Z13CF17") - [Z8CF17 Indicative](/materials/afnor/z8cf17 "AFNOR Z8CF17") UNE Spain · 1 - [F.3114 Indicative](/materials/une/f-3114 "UNE F.3114") JIS Japan · 1 - [SUS 430F Indicative](/materials/jis/sus430f "JIS SUS 430F") GB China · 1 - [Y1Cr17 Indicative](/materials/gb/y1cr17 "GB Y1Cr17") UNI Italy · 1 - [X10CrS17 Indicative](/materials/uni/x10crs17 "UNI X10CrS17") SRPS Serbia · 1 - **Č.4770.1 Indicative** JUS former Yugoslavia · 1 - **Č.47701 Indicative** Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Chemical composition 7 elements on file · weight % What this alloy is Fe Cr Si Mn Iron — the balance, never listed by a standard — 79.2 % Cr — 17 % Si — 1.5 % Mn — 1.5 % Traces & impurities · 0.8 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | ≤ 0.08 | | Si | ≤ 1.5 | | Mn | ≤ 1.5 | | P | 0.04 | | S | 0.15–0.35 — Unusual | | Cr | 16–18 | | Mo | 0.2–0.6 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Molybdenum 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 | ≤0,08 | — | 0.080 | Max | | Si | ≤1,50 | — | 1.500 | Max | | P | 0,04 | 0.040 | 0.040 | Exact | | S | 0,15-0,35 | 0.150 | 0.350 | Range | | Cr | 16,0-18,0 | 16.000 | 18.000 | Range | | Mn | ≤1,50 | — | 1.500 | Max | | Mo | 0,20-0,60 | 0.200 | 0.600 | 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. ## Physical & mechanical properties Density 7,7 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 · 1 values By delivery state**Soft annealed** source `steelnumber` | Delivery state | HB | |---|---| | Soft annealed | 200 | 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 1.4, a shared category, and a published range for Cr / 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. [1.4016 1.4016 Cr 16,0-18,0 · Si ≤1,00 - ΔCr 0.00 - ΔSi 0.25 - 68 designations](/materials/material-no/1.4016 "1.4016")[X85Cr17 1.4041 Cr 16,0-18,0 · Si ≤1,00 - ΔCr 0.00 - ΔSi 0.25 - 15 designations](/materials/din-en/x85cr17 "X85Cr17")[1.4113 1.4113 Cr 16,0-18,0 · Si ≤1,00 - ΔCr 0.00 - ΔSi 0.25 - 15 designations](/materials/material-no/1.4113 "1.4113")[X105CrMo17 1.4125 Cr 16,0-18,0 · Si ≤1,00 - ΔCr 0.00 - ΔSi 0.25 - 50 designations](/materials/din-en/x105crmo17 "X105CrMo17")[X5CrNi17-7 1.4319 Cr 16,0-18,0 · Si ≤1,00 - ΔCr 0.00 - ΔSi 0.25 - 23 designations](/materials/din-en/x5crni17-7 "X5CrNi17-7")[X3CrTi17 1.4510 Cr 16,0-18,0 · Si ≤1,00 - ΔCr 0.00 - ΔSi 0.25 - 42 designations](/materials/din-en/x3crti17 "X3CrTi17") ## 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=fc8ae578-a010-4fd0-af77-db55419385dc&designation=03d452b3-4488-4a7a-ae3f-7170540efd1d "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/srps/c-4770-1.pdf "Datasheet as PDF")