--- title: "SK105 — Unalloyed tool steels / carbon steels" description: "SK105 in JIS: material number 1.1545, also listed as C105U. Category: Unalloyed tool steels / carbon steels. 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Compare it to detect a real > content change; `generated` moves on every render and is not a change signal. JIS · Japan · 67 designations # SK105 SK105 is a designation in JIS for the material held under material number 1.1545, also listed as C105U. It is a material in the category Unalloyed tool steels / carbon steels. We list 67 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, BS, AFNOR, UNE, ISO, JIS, GB, GOST, UNI, SS, ČSN, STN, SRPS, PN, MSZ, STAS, BDS and ÖNORM. - [*Material no.* **1.1545**](/materials/material-no/1.1545 "Material no.: 1.1545") - [*Category* **Unalloyed tool steels / carbon steels · 35 grades**](/categories/unalloyed-tool-steels-carbon-steels "Category: Unalloyed tool steels / carbon steels · 35 grades") - *Designations* **67** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=d9351706-9240-45fc-90a1-b04ea44df2aa&designation=1b229ab6-3224-43db-8058-95afd4604bbd "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/jis/sk105.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN C105U This grade’s own name](/materials/din-en/c105u "DIN / EN C105U") - [AISI / SAE W110 This grade’s own name · 3 grades on that route](/materials/aisi-sae/w110 "AISI / SAE W110") ## About Unalloyed tool steels / carbon steels Unalloyed tool steels are carbon steels whose working properties are developed primarily through carbon content and heat treatment. They are characterised by high attainable hardness and wear resistance, and are used for cutting tools, punches, dies, gauges and other tooling where edge retention and resistance to deformation are important. This describes the material class as a whole. Always confirm the individual grade against the standard before ordering. ## Also known as 67 designations · 20 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 Withdrawn designation no longer current — a separate column from the two above, so a name can be same grade and withdrawn at once.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 - [1.1545 Indicative](/materials/material-no/1.1545 "DIN / EN 1.1545") - [C105U This grade’s own name](/materials/din-en/c105u "DIN / EN C105U") - [C105W1 This grade’s own name Withdrawn](/materials/din-en/c105w1 "DIN / EN C105W1") UNS United States · 2 - [T72301 Indicative](/materials/uns/t72301 "UNS T72301") - [W110 Indicative](/materials/aisi-sae/w110 "UNS W110") AISI / SAE United States · 9 - [G51320 Indicative](/materials/uns/g51320 "AISI / SAE G51320") - [T72301 Indicative](/materials/uns/t72301 "AISI / SAE T72301") - [T72305 Indicative](/materials/aisi-sae/t72305 "AISI / SAE T72305") - [W1 Indicative](/materials/aisi-sae/w1 "AISI / SAE W1") - [W110 This grade’s own name](/materials/aisi-sae/w110 "AISI / SAE W110") - [W110 przybliż Indicative](/materials/aisi-sae/w110-przybliz "AISI / SAE W110 przybliż") - [W1C 1,00% This grade’s own name](/materials/aisi-sae/w1c-1-00 "AISI / SAE W1C 1,00%") - [W210 Indicative](/materials/aisi-sae/w210 "AISI / SAE W210") - [W5 Indicative](/materials/aisi-sae/w5 "AISI / SAE W5") BS United Kingdom · 4 - [060A96 Indicative](/materials/bs/060a96 "BS 060A96") - [BW1A Indicative](/materials/bs/bw1a "BS BW1A") - [BW1B Indicative](/materials/bs/bw1b "BS BW1B") - [BW2 Indicative](/materials/bs/bw2 "BS BW2") AFNOR France · 5 - [C105E2U Indicative](/materials/afnor/c105e2u "AFNOR C105E2U") - [XC100 Indicative](/materials/afnor/xc100 "AFNOR XC100") - [Y1-105 Indicative](/materials/afnor/y1-105 "AFNOR Y1-105") - [Y105 Indicative](/materials/afnor/y105 "AFNOR Y105") - [Y120 Indicative](/materials/afnor/y120 "AFNOR Y120") UNE Spain · 4 - [C102 Indicative](/materials/une/c102 "UNE C102") - [F.5118 Indicative](/materials/une/f-5118 "UNE F.5118") - [F.515 Indicative](/materials/une/f-515 "UNE F.515") - [F.516 Indicative](/materials/une/f-516 "UNE F.516") ISO International · 2 - [C105U Indicative](/materials/din-en/c105u "ISO C105U") - [CT105 Indicative](/materials/iso/ct105 "ISO CT105") JIS Japan · 5 - **SK105 Indicative** - [SK3 Indicative](/materials/jis/sk3 "JIS SK3") - [SK3 / SK4 przybliż. Indicative](/materials/jis/sk3-sk4-przybliz "JIS SK3 / SK4 przybliż.") - [SK4 Indicative](/materials/jis/sk4 "JIS SK4") - [SUP4 Indicative](/materials/jis/sup4 "JIS SUP4") GB China · 2 - [T10 Indicative](/materials/gb/t10 "GB T10") - [T10A Indicative](/materials/gb/t10a "GB T10A") GOST Russia / CIS · 6 - [U10A Indicative](/materials/bds/u10a "GOST U10A") - [U10А Indicative](/materials/bds/u10a "GOST U10А") - [U11 Indicative](/materials/gost/u11 "GOST U11") - [U11А Indicative](/materials/gost/u11a "GOST U11А") - [У10А Indicative](/materials/bds/u10a "GOST У10А") - [У11 Indicative](/materials/gost/u11 "GOST У11") UNI Italy · 3 - [C100KU Indicative](/materials/uni/c100ku "UNI C100KU") - [C120KU Indicative](/materials/uni/c120ku "UNI C120KU") - [C36KU Indicative](/materials/uni/c36ku "UNI C36KU") SS Sweden · 2 - [1880 Indicative](/materials/ss/1880 "SS 1880") - [2900 Indicative](/materials/ss/2900 "SS 2900") ČSN Czechia · 1 - [19191 Indicative](/materials/csn/19191 "ČSN 19191") STN Slovakia · 1 - [19 191 Indicative](/materials/csn/19191 "STN 19 191") SRPS Serbia · 1 - [Č.1940 Indicative](/materials/srps/c-1940 "SRPS Č.1940") PN Poland · 5 - [N10 Indicative](/materials/pn/n10 "PN N10") - [N10E Indicative](/materials/pn/n10e "PN N10E") - [N11 Indicative](/materials/pn/n11 "PN N11") - [N11E Indicative](/materials/pn/n11e "PN N11E") - [stal węglowa Indicative](/materials/pn/stal-weglowa "PN stal węglowa") MSZ Hungary · 4 - [S101 Indicative](/materials/msz/s101 "MSZ S101") - [S102 Indicative](/materials/msz/s102 "MSZ S102") - [S111 Indicative](/materials/msz/s111 "MSZ S111") - [S112 Indicative](/materials/msz/s112 "MSZ S112") STAS Romania · 2 - [OSC10 Indicative](/materials/stas/osc10 "STAS OSC10") - [OSC11 Indicative](/materials/stas/osc11 "STAS OSC11") BDS Bulgaria · 4 - [C105U Indicative](/materials/din-en/c105u "BDS C105U") - [U10A Indicative](/materials/bds/u10a "BDS U10A") - [U11 Indicative](/materials/gost/u11 "BDS U11") - [U11A Indicative](/materials/gost/u11a "BDS U11A") ÖNORM Austria · 2 - [BOHLERK990 Indicative](/materials/onorm/bohlerk990 "ÖNORM BOHLERK990") - [K990 Indicative](/materials/onorm/k990 "ÖNORM K990") Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Chemical composition 5 elements on file · weight % What this alloy is Fe C Mn Si Iron — the balance, never listed by a standard — 98.4 % C — 1.1 % Mn — 0.3 % Si — 0.2 % Traces & impurities · 0.1 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 1–1.1 | | Si | 0.1–0.3 | | Mn | 0.1–0.4 | | P | 0.03 | | S | 0.03 | Carbon Silicon Manganese Phosphorus Sulfur 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 | 1,00-1,10 | 1.000 | 1.100 | Range | | Si | 0,10-0,30 | 0.100 | 0.300 | Range | | P | 0,03 | 0.030 | 0.030 | Exact | | S | 0,03 | 0.030 | 0.030 | Exact | | Mn | 0,10-0,40 | 0.100 | 0.400 | 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, Cr, Mo. ## Physical & mechanical properties Density 7,85 g/cm³ Exact 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 3 conditions · 10 values By delivery state**no delivery state stated** source `splav` | Delivery state | Rm N/mm² | Re N/mm² | A5% | Z% | HB | |---|---|---|---|---|---| | Rolled stock hotrolled, GOST 1414-75 | 410 | — | 22 | 34 | — | | Rolled stock, GOST 1414-75 | 490 | 390 | 10 | — | — | | Rolled stock GOST 1414-75 | — | — | — | — | 207 | By delivery state**no delivery state stated** source `steeljis` | Delivery state | HB | HRC | |---|---|---| | ( SK3 ) Annealed | 212 | — | | ( SK3 ) Quenched and tempered | — | 61 | By delivery state**Soft annealed** source `steelnumber` | Delivery state | HB | |---|---| | Soft annealed | 212 | 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 1.1, 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. [1.1620 1.1520 Mn 0,10-0,40 · Si 0,10-0,30 - ΔMn 0.00 - ΔSi 0.00 - 21 designations](/materials/material-no/1.1620 "1.1620")[C80U 1.1525 Mn 0,10-0,40 · Si 0,10-0,30 - ΔMn 0.00 - ΔSi 0.00 - 44 designations](/materials/din-en/c80u "C80U")[C105W2 1.1535 Mn 0,10-0,40 · Si 0,10-0,30 - ΔMn 0.00 - ΔSi 0.00 - 26 designations](/materials/din-en/c105w2 "C105W2")[C110W1 1.1555 Mn 0,10-0,40 · Si 0,10-0,30 - ΔMn 0.00 - ΔSi 0.00 - 31 designations](/materials/din-en/c110w1 "C110W1")[C110U 1.1554 Mn 0,10-0,35 · Si 0,10-0,30 - ΔMn 0.03 - ΔSi 0.00 - 9 designations](/materials/din-en/c110u "C110U")[C125U 1.1563 Mn 0,10-0,35 · Si 0,10-0,30 - ΔMn 0.03 - ΔSi 0.00 - 32 designations](/materials/din-en/c125u "C125U") ## 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=d9351706-9240-45fc-90a1-b04ea44df2aa&designation=1b229ab6-3224-43db-8058-95afd4604bbd "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/jis/sk105.pdf "Datasheet as PDF")