--- title: "KL3 — Fine-grain structural steels" description: "KL3 in MSZ: material number 1.0436, also listed as P305GH. Category: Fine-grain structural steels. 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Compare it to detect a real > content change; `generated` moves on every render and is not a change signal. MSZ · Hungary · 38 designations # KL3 KL3 is a designation in MSZ for the material held under material number 1.0436, also listed as P305GH. It is a material in the category Fine-grain structural steels. We list 38 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, BS, AFNOR, JIS, GOST, UNI, SS, ČSN, PN, MSZ, AS / NZS, BDS and ÖNORM. - [*Material no.* **1.0436**](/materials/material-no/1.0436 "Material no.: 1.0436") - [*Category* **Fine-grain structural steels · 50 grades**](/categories/fine-grain-structural-steels "Category: Fine-grain structural steels · 50 grades") - *Designations* **38** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=ab2d7b93-3aee-4d2f-9465-556137237fd0&designation=25e39716-242f-48aa-812f-2932ffbdd991 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/msz/kl3.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN P305GH This grade’s own name](/materials/din-en/p305gh "DIN / EN P305GH") - [UNS K02007 This grade’s own name · 4 grades on that route](/materials/uns/k02007 "UNS K02007") ## About Fine-grain structural steels Fine-grain structural steel is a name for structural steels whose properties are particularly suitable for welding. They have a higher yield strength than comparable steels. Due to the negative influence of carbon on the weldability of a material, the maximum carbon content in fine-grained structural steels is less than 0.2%. These properties are achieved in steelmaking by the addition of oxygen and nitrogen-binding elements. The fine grain in the metallurgical structure is achieved by alloying elements whose nitrides and carbides only dissolve at higher temperatures. With the same composition, they are stronger and tougher than coarse-grained steels. Fine-grained structural steels are used above all in reinforced concrete structures such as bridges, in the construction of cranes, hydraulic cylinders or other welded structures due to their special welding suitability and in the offshore area. This describes the material class as a whole. Always confirm the individual grade against the standard before ordering. ## Also known as 38 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 · 1 - [P305GH This grade’s own name](/materials/din-en/p305gh "DIN / EN P305GH") UNS United States · 4 - [K02007 This grade’s own name](/materials/uns/k02007 "UNS K02007") - [K02403 This grade’s own name](/materials/uns/k02403 "UNS K02403") - [K03006 This grade’s own name](/materials/uns/k03006 "UNS K03006") - [K12447 Indicative](/materials/uns/k12447 "UNS K12447") AISI / SAE United States · 6 - [K02100 Indicative](/materials/uns/k02100 "AISI / SAE K02100") - [K02704 Indicative](/materials/uns/k02704 "AISI / SAE K02704") - [K02707 Indicative](/materials/uns/k02707 "AISI / SAE K02707") - [K02800 Indicative](/materials/uns/k02800 "AISI / SAE K02800") - [K03006 Indicative](/materials/uns/k03006 "AISI / SAE K03006") - [X46 Indicative](/materials/aisi-sae/x46 "AISI / SAE X46") BS United Kingdom · 4 - [151-430 Indicative](/materials/bs/151-430 "BS 151-430") - [161-430 Indicative](/materials/bs/161-430 "BS 161-430") - [223-460 Indicative](/materials/bs/223-460 "BS 223-460") - [430LT Indicative](/materials/bs/430lt "BS 430LT") AFNOR France · 2 - [A48AP Indicative](/materials/afnor/a48ap "AFNOR A48AP") - [A48FP Indicative](/materials/afnor/a48fp "AFNOR A48FP") JIS Japan · 4 - [SG325 Indicative](/materials/jis/sg325 "JIS SG325") - [SPV315 Indicative](/materials/jis/spv315 "JIS SPV315") - [STB410 Indicative](/materials/jis/stb410 "JIS STB410") - [STPT480 Indicative](/materials/jis/stpt480 "JIS STPT480") GOST Russia / CIS · 2 - [18k Indicative](/materials/bds/18k "GOST 18k") - [18К Indicative](/materials/bds/18k "GOST 18К") UNI Italy · 3 - [C18 Indicative](/materials/uni/c18 "UNI C18") - [Fe510-1KG Indicative](/materials/uni/fe510-1kg "UNI Fe510-1KG") - [Fe510-1KW Indicative](/materials/uni/fe510-1kw "UNI Fe510-1KW") SS Sweden · 1 - [2103 Indicative](/materials/ss/2103 "SS 2103") ČSN Czechia · 4 - [11 481 Indicative](/materials/csn/11481 "ČSN 11 481") - [11444 Indicative](/materials/csn/11444 "ČSN 11444") - [11478 Indicative](/materials/csn/11478 "ČSN 11478") - [12022 Indicative](/materials/csn/12022 "ČSN 12022") PN Poland · 2 - [K18 Indicative](/materials/pn/k18 "PN K18") - [St44K Indicative](/materials/pn/st44k "PN St44K") MSZ Hungary · 2 - [A45.47 Indicative](/materials/msz/a45-47 "MSZ A45.47") - **KL3 Indicative** AS / NZS Australia / New Zealand · 1 - [7-430R Indicative](/materials/as-nzs/7-430r "AS / NZS 7-430R") BDS Bulgaria · 1 - [18K Indicative](/materials/bds/18k "BDS 18K") ÖNORM Austria · 1 - [17Mn4KW Indicative](/materials/onorm/17mn4kw "ÖNORM 17Mn4KW") Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Chemical composition 11 elements on file · weight % What this alloy is Fe Mn Si Cr Iron — the balance, never listed by a standard — 97.1 % Mn — 1.3 % 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 | 0.15–0.2 | | Si | ≤ 0.4 | | Mn | 0.9–1.6 | | P | 0.025 | | S | 0.015 | | Cr | ≤ 0.3 | | Mo | ≤ 0.08 | | Ni | ≤ 0.3 | | V | ≤ 0.02 | | Cu | ≤ 0.3 | | Nb | ≤ 0.01 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Molybdenum Nickel Vanadium Copper 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 | 0,15-0,20 | 0.150 | 0.200 | Range | | Si | ≤0,40 | — | 0.400 | Max | | P | 0,025 | 0.025 | 0.025 | Exact | | S | 0,015 | 0.015 | 0.015 | Exact | | V | ≤0,02 | — | 0.020 | Max | | Cr | ≤0,30 | — | 0.300 | Max | | Mn | 0,90-1,60 | 0.900 | 1.600 | Range | | Ni | ≤0,30 | — | 0.300 | Max | | Cu | ≤0,30 | — | 0.300 | Max | | Nb | ≤0,01 | — | 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 808 °C Predicted Ae1 712 °C Predicted Acm 436 °C Predicted Bs 551 °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. ## 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. [S355NH 1.0539 Mn 0,90-1,65 · Si ≤0,50 - ΔMn 0.02 - ΔSi 0.05 - 7 designations](/materials/din-en/s355nh "S355NH")[S355NH 1.0545 Mn 0,90-1,65 · Si ≤0,50 - ΔMn 0.02 - ΔSi 0.05 - 16 designations](/materials/din-en/s355nh "S355NH")[A633Gr.D 1.0546 Mn 0,90-1,65 · Si ≤0,50 - ΔMn 0.02 - ΔSi 0.05 - 15 designations](/materials/din-en/a633gr-d "A633Gr.D")[1.0486 1.0486 Mn 0,80-1,50 · Si ≤0,40 - ΔMn 0.10 - ΔSi 0.00 - 18 designations](/materials/material-no/1.0486 "1.0486")[P275NH 1.0487 Mn 0,80-1,50 · Si ≤0,40 - ΔMn 0.10 - ΔSi 0.00 - 10 designations](/materials/din-en/p275nh "P275NH")[P315N 1.0505 Mn 0,70-1,50 · Si ≤0,45 - ΔMn 0.15 - ΔSi 0.02 - 7 designations](/materials/din-en/p315n "P315N") ## 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=ab2d7b93-3aee-4d2f-9465-556137237fd0&designation=25e39716-242f-48aa-812f-2932ffbdd991 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/msz/kl3.pdf "Datasheet as PDF")