--- title: "ст.15HM — Case hardening steels" description: "ст.15HM in GOST: material number 1.7016, also listed as 17Cr3. Category: Case hardening steels. Designations recorded for this grade: 36." canonical: https://steelequivalents.com/materials/gost/st-15hm language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/gost/st-15hm.md cs: https://steelequivalents.com/cs/materiály/gost/st-15hm.md de: https://steelequivalents.com/de/werkstoffe/gost/st-15hm.md es: https://steelequivalents.com/es/materiales/gost/st-15hm.md fr: https://steelequivalents.com/fr/matériaux/gost/st-15hm.md hu: https://steelequivalents.com/hu/anyagok/gost/st-15hm.md it: https://steelequivalents.com/it/materiali/gost/st-15hm.md nl: https://steelequivalents.com/nl/materialen/gost/st-15hm.md pl: https://steelequivalents.com/pl/materiały/gost/st-15hm.md pt: https://steelequivalents.com/pt/materiais/gost/st-15hm.md ru: https://steelequivalents.com/ru/материалы/gost/ст.15hm.md tr: https://steelequivalents.com/tr/malzemeler/gost/st-15hm.md zh: https://steelequivalents.com/zh/材料/gost/st-15hm.md ja: https://steelequivalents.com/ja/材料/gost/st-15hm.md ar: https://steelequivalents.com/ar/المواد/gost/st-15hm.md ko: https://steelequivalents.com/ko/재료/gost/st-15hm.md pt-br: https://steelequivalents.com/pt-br/materiais/gost/st-15hm.md hi: https://steelequivalents.com/hi/सामग्री/gost/st-15hm.md content_hash: sha256:04ebb6d962ce01e2cb0211afa3e17df3d8a0fb3ba82cff5c44f01142bc86774e 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/st-15hm > Canonical URL: https://steelequivalents.com/materials/gost/st-15hm > 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 · 36 designations # ст.15HM ст.15HM is a designation in GOST for the material held under material number 1.7016, also listed as 17Cr3. It is a material in the category Case hardening steels. We list 36 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, BS, AFNOR, UNE, JIS, GOST, ČSN, STN, PN and SRPS. - [*Material no.* **1.7016**](/materials/material-no/1.7016 "Material no.: 1.7016") - [*Category* **Case hardening steels · 60 grades**](/categories/case-hardening-steels "Category: Case hardening steels · 60 grades") - *Designations* **36** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=add8f21e-075b-46fe-ab9f-153b47d50f3e&designation=8062fa03-10e1-4b82-8e5d-e048cd240cbe "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/gost/st-15hm.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN 17Cr3 This grade’s own name](/materials/din-en/17cr3 "DIN / EN 17Cr3") - [UNS G46150 This grade’s own name](/materials/uns/g46150 "UNS G46150") - [AISI / SAE 4615 This grade’s own name](/materials/aisi-sae/4615 "AISI / SAE 4615") ## About Case hardening steels Case hardening steels are steels designed to develop a hard, wear-resistant surface while retaining a tough and ductile core. They are used for components such as gears, shafts and other machine parts exposed to contact wear and cyclic loading. This describes the material class as a whole. Always confirm the individual grade against the standard before ordering. ## Also known as 36 designations · 12 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 - [17Cr3 This grade’s own name](/materials/din-en/17cr3 "DIN / EN 17Cr3") UNS United States · 6 - [G46150 This grade’s own name](/materials/uns/g46150 "UNS G46150") - [G50150 This grade’s own name](/materials/uns/g50150 "UNS G50150") - [G51150 This grade’s own name](/materials/uns/g51150 "UNS G51150") - [G51170 This grade’s own name](/materials/uns/g51170 "UNS G51170") - [G61180 This grade’s own name](/materials/uns/g61180 "UNS G61180") - [H61180 This grade’s own name](/materials/uns/h61180 "UNS H61180") AISI / SAE United States · 5 - [4615 This grade’s own name](/materials/aisi-sae/4615 "AISI / SAE 4615") - [5015 This grade’s own name](/materials/aisi-sae/5015 "AISI / SAE 5015") - [5117 This grade’s own name](/materials/aisi-sae/5117 "AISI / SAE 5117") - [6118 This grade’s own name](/materials/aisi-sae/6118 "AISI / SAE 6118") - [6118H This grade’s own name](/materials/aisi-sae/6118h "AISI / SAE 6118H") BS United Kingdom · 2 - [17CrS3 Indicative](/materials/din-en/17crs3 "BS 17CrS3") - [527M17 Indicative](/materials/bs/527m17 "BS 527M17") AFNOR France · 1 - [12C3 Indicative](/materials/afnor/12c3 "AFNOR 12C3") UNE Spain · 1 - [F-1516 Indicative](/materials/une/f-1516 "UNE F-1516") JIS Japan · 2 - [SCr415 Indicative](/materials/ks/scr415 "JIS SCr415") - [SCr415H Indicative](/materials/ks/scr415h "JIS SCr415H") GOST Russia / CIS · 14 - [15Ch Indicative](/materials/bds/15ch "GOST 15Ch") - [15G2SF Indicative](/materials/gost/15g2sf "GOST 15G2SF") - [15G2SFD Indicative](/materials/gost/15g2sfd "GOST 15G2SFD") - [15G2АFD Indicative](/materials/gost/15g2afd "GOST 15G2АFD") - [15G2АFDps Indicative](/materials/gost/15g2afdps "GOST 15G2АFDps") - [15HM Indicative](/materials/pn/15hm "GOST 15HM") - [15KH Indicative](/materials/gost/15kh "GOST 15KH") - [15KHGN2TА Indicative](/materials/gost/15khgn2ta "GOST 15KHGN2TА") - [15N2M Indicative](/materials/gost/15n2m "GOST 15N2M") - [15Н2М Indicative](/materials/gost/15n2m "GOST 15Н2М") - [15НМ Indicative](/materials/gost/15nm "GOST 15НМ") - [15ХГНТА Indicative](/materials/gost/15khgnta "GOST 15ХГНТА") - **ст.15HM Indicative** - [ст.15Н2М Indicative](/materials/gost/st-15n2m "GOST ст.15Н2М") ČSN Czechia · 1 - [14120 Indicative](/materials/csn/14120 "ČSN 14120") STN Slovakia · 1 - [14 120 Indicative](/materials/csn/14120 "STN 14 120") PN Poland · 1 - [15H Indicative](/materials/pn/15h "PN 15H") SRPS Serbia · 1 - [Č.4120 Indicative](/materials/srps/c-4120 "SRPS Č.4120") 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 Si Iron — the balance, never listed by a standard — 97.8 % Cr — 0.9 % Mn — 0.8 % Si — 0.4 % Traces & impurities · 0.2 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.14–0.2 | | Si | ≤ 0.4 | | Mn | 0.6–0.9 | | P | 0.025 | | S | 0.035 | | Cr | 0.7–1 | 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 | 0,14-0,20 | 0.140 | 0.200 | Range | | Si | ≤0,40 | — | 0.400 | Max | | P | 0,025 | 0.025 | 0.025 | Exact | | S | 0,035 | 0.035 | 0.035 | Exact | | Cr | 0,70-1,00 | 0.700 | 1.000 | 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 7,85 g/cm³ Exact Transformation point Ac1 720 °C Exact Transformation point Ac3 850 °C Exact · Ac3(Acm) Weldability readily weldable As published: without limitations. 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 · 13 values By delivery state**Soft annealed** source `steelnumber` | Delivery state | HB | HRB | HV | |---|---|---|---| | Soft annealed | 174 | 84 | 170 | By dimension**no delivery state stated** source `splav` | Dimension mm | Rm N/mm² | Re N/mm² | A5% | |---|---|---|---| | 5 - 9 | 560 | 400 | 18 | By delivery state**Treated to ferrite-pearlite structure and hardness range** source `steelnumber` | Delivery state | HB | |---|---| | Treated to ferrite-pearlite structure and hardness range | 140 – 187 | By dimension**no delivery state stated** source `splav` | Dimension mm | Rm N/mm² | Re N/mm² | A5% | |---|---|---|---| | to 50 | 510 | 390 | 19 | By dimension**no delivery state stated** source `splav` | Dimension mm | Rm N/mm² | Re N/mm² | A5% | |---|---|---|---| | to 50 | 530 | 390 | 18 | 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. [17CrS3 1.7014 Cr 0,70-1,00 · Mn 0,60-0,90 - ΔCr 0.00 - ΔMn 0.00 - 2 designations](/materials/din-en/17crs3 "17CrS3")[23CrMoB3-3 1.7271 Cr 0,70-0,90 · Mn 0,70-0,90 - ΔCr 0.05 - ΔMn 0.05 - 1 designations](/materials/din-en/23crmob3-3 "23CrMoB3-3")[22CrMoS3-5 1.7333 Cr 0,70-1,00 · Mn 0,70-1,00 - ΔCr 0.00 - ΔMn 0.10 - 1 designations](/materials/din-en/22crmos3-5 "22CrMoS3-5")[22CrV3 1.7511 Cr 0,65-0,80 · Mn 0,60-0,75 - ΔCr 0.12 - ΔMn 0.07 - 5 designations](/materials/din-en/22crv3 "22CrV3")[20Cr4 1.7027 Cr 0,90-1,20 · Mn 0,60-0,90 - ΔCr 0.20 - ΔMn 0.00 - 25 designations](/materials/din-en/20cr4 "20Cr4")[20CrS4 1.7028 Cr 0,90-1,20 · Mn 0,60-0,90 - ΔCr 0.20 - ΔMn 0.00 - 1 designations](/materials/din-en/20crs4 "20CrS4") ## 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=add8f21e-075b-46fe-ab9f-153b47d50f3e&designation=8062fa03-10e1-4b82-8e5d-e048cd240cbe "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/gost/st-15hm.pdf "Datasheet as PDF")