--- title: "14 151 PH — Quenched and tempered steels" description: "14 151 PH in ČSN: material number 1.7035, also listed as 41Cr4. Category: Quenched and tempered steels. Designations recorded for this grade: 67." canonical: https://steelequivalents.com/materials/csn/14-151-ph language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/csn/14-151-ph.md cs: https://steelequivalents.com/cs/materiály/csn/14-151-ph.md de: https://steelequivalents.com/de/werkstoffe/csn/14-151-ph.md es: https://steelequivalents.com/es/materiales/csn/14-151-ph.md fr: https://steelequivalents.com/fr/matériaux/csn/14-151-ph.md hu: https://steelequivalents.com/hu/anyagok/csn/14-151-ph.md it: https://steelequivalents.com/it/materiali/csn/14-151-ph.md nl: https://steelequivalents.com/nl/materialen/csn/14-151-ph.md pl: https://steelequivalents.com/pl/materiały/csn/14-151-ph.md pt: https://steelequivalents.com/pt/materiais/csn/14-151-ph.md ru: https://steelequivalents.com/ru/материалы/csn/14-151-ph.md tr: https://steelequivalents.com/tr/malzemeler/csn/14-151-ph.md zh: https://steelequivalents.com/zh/材料/csn/14-151-ph.md ja: https://steelequivalents.com/ja/材料/csn/14-151-ph.md ar: https://steelequivalents.com/ar/المواد/csn/14-151-ph.md ko: https://steelequivalents.com/ko/재료/csn/14-151-ph.md pt-br: https://steelequivalents.com/pt-br/materiais/csn/14-151-ph.md hi: https://steelequivalents.com/hi/सामग्री/csn/14-151-ph.md content_hash: sha256:9309e790bd24def72464bb1a5f95ac9966f62b059fecb22e43197a8949d14ec6 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/14-151-ph > Canonical URL: https://steelequivalents.com/materials/csn/14-151-ph > 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 · 67 designations # 14 151 PH 14 151 PH is a designation in ČSN for the material held under material number 1.7035, also listed as 41Cr4. It is a material in the category Quenched and tempered 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, PN, COPANT, SRPS, MKE, MSZ and BDS. - [*Material no.* **1.7035**](/materials/material-no/1.7035 "Material no.: 1.7035") - [*Category* **Quenched and tempered steels · 133 grades**](/categories/quenched-and-tempered-steels "Category: Quenched and tempered steels · 133 grades") - *Designations* **67** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=14c984ef-df84-4826-908d-c19120a246e2&designation=9dd51ff1-5ada-46a1-8077-0b0500ff3428 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/csn/14-151-ph.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN 41Cr4 This grade’s own name](/materials/din-en/41cr4 "DIN / EN 41Cr4") - [UNS H51400 This grade’s own name · 2 grades on that route](/materials/uns/h51400 "UNS H51400") - [AISI / SAE 5140H This grade’s own name · 3 grades on that route](/materials/aisi-sae/5140h "AISI / SAE 5140H") - [BS EN18 This grade’s own name · 2 grades on that route](/materials/bs/en18 "BS EN18") - [GOST 40CH This grade’s own name · 3 grades on that route](/materials/gost/40ch "GOST 40CH") ## 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 67 designations · 19 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 - [1.7035 Indicative](/materials/material-no/1.7035 "DIN / EN 1.7035") - [41Cr4 This grade’s own name](/materials/din-en/41cr4 "DIN / EN 41Cr4") UNS United States · 2 - [G51400 Indicative](/materials/uns/g51400 "UNS G51400") - [H51400 This grade’s own name](/materials/uns/h51400 "UNS H51400") AISI / SAE United States · 7 - [5140 Indicative](/materials/aisi-sae/5140 "AISI / SAE 5140") - [5140H This grade’s own name](/materials/aisi-sae/5140h "AISI / SAE 5140H") - [5140RH This grade’s own name](/materials/aisi-sae/5140rh "AISI / SAE 5140RH") - [5145 Indicative](/materials/astm/5145 "AISI / SAE 5145") - [5145H Indicative](/materials/aisi-sae/5145h "AISI / SAE 5145H") - [G51450 Indicative](/materials/aisi-sae/g51450 "AISI / SAE G51450") - [H51450 Indicative](/materials/aisi-sae/h51450 "AISI / SAE H51450") BS United Kingdom · 4 - [520M40 Indicative](/materials/bs/520m40 "BS 520M40") - [530A40 Indicative](/materials/bs/530a40 "BS 530A40") - [530M40 Indicative](/materials/bs/530m40 "BS 530M40") - [EN18 This grade’s own name](/materials/bs/en18 "BS EN18") AFNOR France · 4 - [41Cr4 Indicative](/materials/din-en/41cr4 "AFNOR 41Cr4") - [42C4 Indicative](/materials/afnor/42c4 "AFNOR 42C4") - [42C4FF Indicative](/materials/afnor/42c4ff "AFNOR 42C4FF") - [45C4 Indicative](/materials/afnor/45c4 "AFNOR 45C4") UNE Spain · 3 - [42Cr4 Indicative](/materials/din-en/42cr4 "UNE 42Cr4") - [F.1202-42O4 Indicative](/materials/une/f-1202-42o4 "UNE F.1202-42O4") - [F1202 Indicative](/materials/une/f1202 "UNE F1202") ISO International · 4 - [37Cr4 Indicative](/materials/din-en/37cr4 "ISO 37Cr4") - [37CrS4 Indicative](/materials/din-en/37crs4 "ISO 37CrS4") - [41Cr4 Indicative](/materials/din-en/41cr4 "ISO 41Cr4") - [41CrS4 Indicative](/materials/din-en/41crs4 "ISO 41CrS4") JIS Japan · 5 - [S Gr 440 Indicative](/materials/jis/s-gr-440 "JIS S Gr 440") - [SCr 4 H Indicative](/materials/jis/scr-4-h "JIS SCr 4 H") - [SCr440 Indicative](/materials/ks/scr440 "JIS SCr440") - [SCr440H Indicative](/materials/ks/scr440h "JIS SCr440H") - [SCr445 Indicative](/materials/jis/scr445 "JIS SCr445") GB China · 2 - [40Cr Indicative](/materials/gb/40cr "GB 40Cr") - [40CrH Indicative](/materials/gb/40crh "GB 40CrH") GOST Russia / CIS · 17 - [38ChA Indicative](/materials/bds/38cha "GOST 38ChA") - [38KhA Indicative](/materials/gost/38kha "GOST 38KhA") - [40CH This grade’s own name](/materials/gost/40ch "GOST 40CH") - [40KH Indicative](/materials/gost/40kh "GOST 40KH") - [40X Indicative](/materials/gost/40x "GOST 40X") - [45KH Indicative](/materials/gost/45kh "GOST 45KH") - [45Х Indicative](/materials/gost/45kh "GOST 45Х") - [50 Indicative](/materials/bds/50 "GOST 50") - [50A Indicative](/materials/csa/50a "GOST 50A") - [50G Indicative](/materials/gost/50g "GOST 50G") - [50KH Indicative](/materials/gost/50kh "GOST 50KH") - [50KhGL Indicative](/materials/gost/50khgl "GOST 50KhGL") - [50KHN Indicative](/materials/gost/50khn "GOST 50KHN") - [50KhNM Indicative](/materials/gost/50khnm "GOST 50KhNM") - [50KHSА Indicative](/materials/gost/50khsa "GOST 50KHSА") - [N50 Indicative](/materials/gost/n50 "GOST N50") - [ст.40X Indicative](/materials/gost/st-40x "GOST ст.40X") UNI Italy · 1 - [41Cr4 Indicative](/materials/din-en/41cr4 "UNI 41Cr4") SS Sweden · 2 - [2245 Indicative](/materials/ss/2245 "SS 2245") - [SIS 2245 This grade’s own name](/materials/ss/sis-2245 "SS SIS 2245") ČSN Czechia · 5 - [14 151 Indicative](/materials/csn/14-151 "ČSN 14 151") - **14 151 PH Indicative** - [14140 Indicative](/materials/csn/14140 "ČSN 14140") - [14141 Indicative](/materials/csn/14141 "ČSN 14141") - [14148VN Indicative](/materials/csn/14148vn "ČSN 14148VN") PN Poland · 4 - [38HA Indicative](/materials/pn/38ha "PN 38HA") - [40H Indicative](/materials/pn/40h "PN 40H") - [40HA Indicative](/materials/pn/40ha "PN 40HA") - [45H Indicative](/materials/pn/45h "PN 45H") COPANT Latin America · 1 - [5140 Indicative](/materials/aisi-sae/5140 "COPANT 5140") SRPS Serbia · 1 - [Č.4131 Indicative](/materials/srps/c-4131 "SRPS Č.4131") MKE Türkiye · 1 - [Ç 5140 Indicative](/materials/mke/c-5140 "MKE Ç 5140") MSZ Hungary · 1 - [Cr 3 Indicative](/materials/is/cr3 "MSZ Cr 3") BDS Bulgaria · 1 - [45Ch Indicative](/materials/bds/45ch "BDS 45Ch") Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Chemical composition 6 elements on file · weight % What this alloy is Fe Cr Mn C Iron — the balance, never listed by a standard — 97.3 % Cr — 1.1 % Mn — 0.8 % C — 0.4 % Traces & impurities · 0.5 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.38–0.45 | | Si | ≤ 0.4 | | Mn | 0.6–0.9 | | P | 0.035 | | S | 0.035 | | Cr | 0.9–1.2 | Carbon Silicon Manganese Phosphorus Sulfur Chromium 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 | 0,38-0,45 | 0.380 | 0.450 | Range | | Si | ≤0,40 | — | 0.400 | Max | | P | 0,035 | 0.035 | 0.035 | Exact | | S | 0,035 | 0.035 | 0.035 | Exact | | Cr | 0,90-1,20 | 0.900 | 1.200 | Range | | Mn | 0,60-0,90 | 0.600 | 0.900 | 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, Mo. ## Physical & mechanical properties Density 7,72 g/cm³ Exact Transformation point Ac1 723 °C Exact Transformation point Ac3 760 °C Exact · Ac3(Acm) Transformation point Ar3 740 °C Exact · Ar3(Arcm) Transformation point Ar1 680 °C Exact Weldability difficult to weld As published: hard weldability. Flake sensitivity susceptible As published: predisposed Temper brittleness susceptible As published: 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 7 conditions · 54 values By delivery state**no delivery state stated** source `splav` | Delivery state | Rm N/mm² | A5% | HB | |---|---|---|---| | Band annealed , GOST 2283-79 | 640 – 740 | 10 – 15 | — | | Band cold-worked , GOST 2283-79 | 740 – 1180 | — | — | | (annealing) , GOST 4543-71 | — | — | 229 | | (normalize) , Sheet trick GOST 1577-93 | — | — | 255 | | (annealing) , Sheet trick GOST 1577-93 | — | — | 217 | By thickness**Quenched and tempered** source `steelnumber` | Thickness mm | Rm N/mm² | |---|---| | ≤ 8 | 1000 | | 8 – 20 | 900 | | 20 – 50 | 800 | By thickness**Quenched and tempered · round products** source `steelnumber` | Thickness mm | A% · Lo = 5,65 √So | |---|---| | ≤ 16 | 11 | | 16 – 40 | 12 | | 40 – 100 | 14 | By delivery state**Treated to improve shearability** source `steelnumber` | Delivery state | HB | |---|---| | Treated to improve shearability | 255 | By delivery state**Soft annealed** source `steelnumber` | Delivery state | HB | |---|---| | Soft annealed | 241 | By dimension**Quenching and drawing** source `splav` | Dimension mm | Rm N/mm² | Re N/mm² | A5% | Z% | KCU kJ/m² | |---|---|---|---|---|---| | Ø 25 | 650 | 390 | 13 | 40 | 390 | 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 | 7.81 | 216 | — | 43 | — | | 100 | — | 213 | 11.8 | 42 | 487 | | 200 | — | 208 | 12.5 | 41 | 500 | | 300 | — | 199 | 13.2 | 38 | 517 | | 400 | — | 185 | 13.8 | 36 | 533 | | 500 | — | 174 | 14.3 | 34 | 559 | | 600 | — | 160 | 14.8 | 31 | 584 | | 700 | — | 142 | 15.1 | 29 | 609 | | 800 | — | 130 | 12.3 | 28 | 676 | 6 further values are held for this grade under a condition the source did not name — a bound with no quantity attached. They are withheld rather than shown against a guessed condition. 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 1.7, a shared category, and a published range for Cr / Mn 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. [28Cr4 1.7030 Cr 0,90-1,20 · Mn 0,60-0,90 - ΔCr 0.00 - ΔMn 0.00 - 28 designations](/materials/din-en/28cr4 "28Cr4")[1.7033 1.7033 Cr 0,90-1,20 · Mn 0,60-0,90 - ΔCr 0.00 - ΔMn 0.00 - 56 designations](/materials/material-no/1.7033 "1.7033")[37Cr4 1.7034 Cr 0,90-1,20 · Mn 0,60-0,90 - ΔCr 0.00 - ΔMn 0.00 - 104 designations](/materials/din-en/37cr4 "37Cr4")[34CrS4 1.7037 Cr 0,90-1,20 · Mn 0,60-0,90 - ΔCr 0.00 - ΔMn 0.00 - 13 designations](/materials/din-en/34crs4 "34CrS4")[37CrS4 1.7038 Cr 0,90-1,20 · Mn 0,60-0,90 - ΔCr 0.00 - ΔMn 0.00 - 10 designations](/materials/din-en/37crs4 "37CrS4")[41CrS4 1.7039 Cr 0,90-1,20 · Mn 0,60-0,90 - ΔCr 0.00 - ΔMn 0.00 - 20 designations](/materials/din-en/41crs4 "41CrS4") ## 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=14c984ef-df84-4826-908d-c19120a246e2&designation=9dd51ff1-5ada-46a1-8077-0b0500ff3428 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/csn/14-151-ph.pdf "Datasheet as PDF")