--- title: "30KhL — Quenched and tempered steels" description: "30KhL in GOST: material number 1.0528, also listed as C30. Category: Quenched and tempered steels. Designations recorded for this grade: 54." canonical: https://steelequivalents.com/materials/gost/30khl language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/gost/30khl.md cs: https://steelequivalents.com/cs/materiály/gost/30khl.md de: https://steelequivalents.com/de/werkstoffe/gost/30khl.md es: https://steelequivalents.com/es/materiales/gost/30khl.md fr: https://steelequivalents.com/fr/matériaux/gost/30khl.md hu: https://steelequivalents.com/hu/anyagok/gost/30khl.md it: https://steelequivalents.com/it/materiali/gost/30khl.md nl: https://steelequivalents.com/nl/materialen/gost/30khl.md pl: https://steelequivalents.com/pl/materiały/gost/30khl.md pt: https://steelequivalents.com/pt/materiais/gost/30khl.md ru: https://steelequivalents.com/ru/материалы/gost/30khl.md tr: https://steelequivalents.com/tr/malzemeler/gost/30khl.md zh: https://steelequivalents.com/zh/材料/gost/30khl.md ja: https://steelequivalents.com/ja/材料/gost/30khl.md ar: https://steelequivalents.com/ar/المواد/gost/30khl.md ko: https://steelequivalents.com/ko/재료/gost/30khl.md pt-br: https://steelequivalents.com/pt-br/materiais/gost/30khl.md hi: https://steelequivalents.com/hi/सामग्री/gost/30khl.md content_hash: sha256:48baa6dec2a444e278c6d5935233d3665a485e70cc0c391ade6b095b9b029f6b 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/gost/30khl > Canonical URL: https://steelequivalents.com/materials/gost/30khl > 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. GOST · Russia / CIS · 54 designations # 30KhL 30KhL is a designation in GOST for the material held under material number 1.0528, also listed as C30. It is a material in the category Quenched and tempered steels. We list 54 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, BS, AFNOR, ISO, JIS, GB, GOST, UNI, ČSN, STN, PN, STAS and BDS. - [*Material no.* **1.0528**](/materials/material-no/1.0528 "Material no.: 1.0528") - [*Category* **Quenched and tempered steels · 133 grades**](/categories/quenched-and-tempered-steels "Category: Quenched and tempered steels · 133 grades") - *Designations* **54** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=03d23a9c-40c5-4e74-8470-d2f2f296bc33&designation=715e3690-7111-48c2-ae9c-b2b5855efa67 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/gost/30khl.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN C30 This grade’s own name](/materials/din-en/c30 "DIN / EN C30") - [UNS G10300 This grade’s own name · 6 grades on that route](/materials/uns/g10300 "UNS G10300") - [AISI / SAE 1030 This grade’s own name · 7 grades on that route](/materials/aisi-sae/1030 "AISI / SAE 1030") ## About Quenched and tempered steels Quenched and tempered steels are heat-treated steels designed to combine high strength with useful toughness and ductility. They are used for heavily loaded components such as shafts, gears, fasteners and structural machine parts where resistance to mechanical stress is required. This describes the material class as a whole. Always confirm the individual grade against the standard before ordering. ## Also known as 54 designations · 15 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 - [1.0528 Indicative](/materials/material-no/1.0528 "DIN / EN 1.0528") - [C30 This grade’s own name](/materials/din-en/c30 "DIN / EN C30") - [Ck30 Indicative](/materials/din-en/ck30 "DIN / EN Ck30") UNS United States · 1 - [G10300 This grade’s own name](/materials/uns/g10300 "UNS G10300") AISI / SAE United States · 4 - [1030 This grade’s own name](/materials/aisi-sae/1030 "AISI / SAE 1030") - [G10300 Indicative](/materials/uns/g10300 "AISI / SAE G10300") - [M1031 Indicative](/materials/aisi-sae/m1031 "AISI / SAE M1031") - [SAE1030 Indicative](/materials/din-en/sae1030 "AISI / SAE SAE1030") BS United Kingdom · 5 - [060A30 Indicative](/materials/bs/060a30 "BS 060A30") - [080A32 Indicative](/materials/bs/080a32 "BS 080A32") - [080M32 Indicative](/materials/bs/080m32 "BS 080M32") - [C30 C30E C30R Indicative](/materials/bs/c30-c30e-c30r "BS C30 C30E C30R") - [En5 Indicative](/materials/bs/en5 "BS En5") AFNOR France · 4 - [AF50C30 Indicative](/materials/afnor/af50c30 "AFNOR AF50C30") - [C30E Indicative](/materials/din-en/c30e "AFNOR C30E") - [FR32 Indicative](/materials/afnor/fr32 "AFNOR FR32") - [XC32 Indicative](/materials/afnor/xc32 "AFNOR XC32") ISO International · 4 - [C30 Indicative](/materials/din-en/c30 "ISO C30") - [C30 C30E4 C30M2 Indicative](/materials/iso/c30-c30e4-c30m2 "ISO C30 C30E4 C30M2") - [C30E Indicative](/materials/din-en/c30e "ISO C30E") - [C30E4 Indicative](/materials/iso/c30e4 "ISO C30E4") JIS Japan · 5 - [S28C Indicative](/materials/jis/s28c "JIS S28C") - [S30C Indicative](/materials/jis/s30c "JIS S30C") - [S33C Indicative](/materials/jis/s33c "JIS S33C") - [SWRCH30K Indicative](/materials/jis/swrch30k "JIS SWRCH30K") - [SWRCH33K Indicative](/materials/jis/swrch33k "JIS SWRCH33K") GB China · 3 - [30 Indicative](/materials/pn/30 "GB 30") - [ML25Mn Indicative](/materials/gb/ml25mn "GB ML25Mn") - [ML30 Indicative](/materials/gb/ml30 "GB ML30") GOST Russia / CIS · 15 - [30 Indicative](/materials/pn/30 "GOST 30") - [30GL Indicative](/materials/gost/30gl "GOST 30GL") - [30KHGFRL Indicative](/materials/gost/30khgfrl "GOST 30KHGFRL") - [30KHGS Indicative](/materials/gost/30khgs "GOST 30KHGS") - [30KHGSFL Indicative](/materials/gost/30khgsfl "GOST 30KHGSFL") - [30KhGSNMA Indicative](/materials/gost/30khgsnma "GOST 30KhGSNMA") - [30KHGT Indicative](/materials/gost/30khgt "GOST 30KHGT") - **30KhL Indicative** - [30KhML Indicative](/materials/gost/30khml "GOST 30KhML") - [30KHRА Indicative](/materials/gost/30khra "GOST 30KHRА") - [CHVG30 Indicative](/materials/gost/chvg30 "GOST CHVG30") - [CHYU30 Indicative](/materials/gost/chyu30 "GOST CHYU30") - [PKh30 Indicative](/materials/gost/pkh30 "GOST PKh30") - [АS30KHM Indicative](/materials/gost/as30khm "GOST АS30KHM") - [АSTS30KHM Indicative](/materials/gost/asts30khm "GOST АSTS30KHM") UNI Italy · 3 - [C30 Indicative](/materials/din-en/c30 "UNI C30") - [C30E Indicative](/materials/din-en/c30e "UNI C30E") - [C30R Indicative](/materials/din-en/c30r "UNI C30R") ČSN Czechia · 1 - [12031 Indicative](/materials/csn/12031 "ČSN 12031") STN Slovakia · 1 - [12 031 Indicative](/materials/csn/12031 "STN 12 031") PN Poland · 3 - [30 Indicative](/materials/pn/30 "PN 30") - [30A Indicative](/materials/pn/30a "PN 30A") - [30rs Indicative](/materials/pn/30rs "PN 30rs") STAS Romania · 1 - [OLC30 Indicative](/materials/stas/olc30 "STAS OLC30") BDS Bulgaria · 1 - [30 Indicative](/materials/pn/30 "BDS 30") Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Chemical composition 8 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 — 0.4 % Traces & impurities · 0.9 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.27–0.34 | | Si | ≤ 0.4 | | Mn | 0.5–0.8 | | P | 0.045 | | S | 0.045 | | Cr | ≤ 0.4 | | Mo | ≤ 0.1 | | Ni | ≤ 0.4 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Molybdenum Nickel 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 | 0,27-0,34 | 0.270 | 0.340 | Range | | Si | ≤0,40 | — | 0.400 | Max | | P | 0,045 | 0.045 | 0.045 | Exact | | S | 0,045 | 0.045 | 0.045 | Exact | | Cr | ≤0,40 | — | 0.400 | Max | | Mn | 0,50-0,80 | 0.500 | 0.800 | Range | | Ni | ≤0,40 | — | 0.400 | Max | | Mo | ≤0,10 | — | 0.100 | Max | - (Cr + Mo + Ni) ≤ 0,63 - (Cr + Mo + Ni) ≤ 0,63 - (Cr + Mo + Ni) ≤ 0,63 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 792 °C Predicted Ae1 724 °C Predicted Acm 539 °C Predicted Bs 566 °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 730 °C Exact Transformation point Ac3 820 °C Exact · Ac3(Acm) Transformation point Ar3 796 °C Exact · Ar3(Arcm) Transformation point Ar1 680 °C Exact Weldability weldable with restrictions As published: limited weldability. 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 5 conditions · 47 values By delivery state**no delivery state stated** source `splav` | Delivery state | Rm N/mm² | A5% | Z% | HB | |---|---|---|---|---| | Rolled stock cold-worked , GOST 1050-88 | 560 | 7 | 35 | — | | Rolled stock annealed , GOST 1050-88 | 440 | 17 | 45 | — | | Band annealed , GOST 2284-79 | 390 – 640 | 16 | — | — | | Band cold-worked , GOST 2284-79 | 640 – 930 | — | — | — | | Sheet GOST 4041-71 | — | — | — | 149 | | Rolled stock GOST 1050-88 | — | — | — | 229 | By thickness**Normalized** source `steelnumber` | Thickness mm | Rm N/mm² | A% | |---|---|---| | ≤ 100 | 480 | 21 | | 100 – 250 | 460 | 21 | By dimension**no delivery state stated** source `splav` | Dimension mm | Rm N/mm² | A5% | |---|---|---| | 4 - 14 | 430 – 590 | 24 | By dimension**Normalizing** source `splav` | Dimension mm | Rm N/mm² | Re N/mm² | A5% | Z% | |---|---|---|---|---| | to 80 | 490 | 295 | 21 | 50 | At temperature**no delivery state stated** source `splav` | Temperature °C | Density g/cm³ | Elastic modulus GPa | Thermal expansion coefficient 10^-6/K | Thermal conductivity W/(m·K) | Specific heat capacity J/(kg·K) | |---|---|---|---|---|---| | 20 | 7.85 | 200 | — | 52 | — | | 100 | — | 196 | 12.1 | 51 | 470 | | 200 | — | 191 | 12.9 | 49 | 483 | | 300 | — | 185 | 13.6 | 46 | 546 | | 400 | — | — | 14.2 | 43 | 563 | | 500 | — | — | 14.7 | 39 | 764 | | 600 | — | 164 | 15 | 36 | — | | 700 | — | — | 15.2 | 32 | — | 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. ## Heat treatment Supply condition - Annealing Conditions the standard permits on delivery. No temperature or medium is published for these, so no order and no alternation is implied. Source: [www.caishuku.com](https://www.caishuku.com/detail/azhlNWIxMjMxOA__ "Source: www.caishuku.com") ## 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. [C26D 1.0415 Mn 0,50-0,80 · Si 0,10-0,30 - ΔMn 0.00 - ΔSi 0.00 - 8 designations](/materials/din-en/c26d "C26D")[1.0501 1.0501 Mn 0,50-0,80 · Si ≤0,40 - ΔMn 0.00 - ΔSi 0.00 - 123 designations](/materials/material-no/1.0501 "1.0501")[C35GPb 1.0502 Mn 0,50-0,80 · Si ≤0,40 - ΔMn 0.00 - ΔSi 0.00 - 2 designations](/materials/din-en/c35gpb "C35GPb")[1.0503 1.0503 Mn 0,50-0,80 · Si ≤0,40 - ΔMn 0.00 - ΔSi 0.00 - 93 designations](/materials/material-no/1.0503 "1.0503")[1.0511 1.0511 Mn 0,50-0,80 · Si ≤0,40 - ΔMn 0.00 - ΔSi 0.00 - 63 designations](/materials/material-no/1.0511 "1.0511")[C42D 1.0541 Mn 0,50-0,80 · Si 0,10-0,30 - ΔMn 0.00 - ΔSi 0.00 - 5 designations](/materials/din-en/c42d "C42D") ## 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=03d23a9c-40c5-4e74-8470-d2f2f296bc33&designation=715e3690-7111-48c2-ae9c-b2b5855efa67 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/gost/30khl.pdf "Datasheet as PDF")