GOST · Russia / CIS · 4 designations

55Х6В3СМФ

6KH6V3MFS is a grade designated under GOST. Its recorded composition includes C 0.5–0.6%, Si 0.6–0.9%, Cr 5.5–6.5%, Mo 0.6–0.9% and W 2.5–3.2%. We list 3 designations recorded for this grade, in the standards GOST. Recorded mechanical properties include Re 1800–2000 N/mm² and HB 255. Recorded transformation points: Ac1 875 °C, Ac3 905 °C and Ar1 755 °C.

Designations 4

Search Inquiry Datasheet as PDFPrint-ready A4 documentGenerating …Download startedTry again

If you came for one of these

The most-used names for this grade.

GOST6KH6V3MFSThis grade’s own name

Also known as

4 designations · 1 standards · nothing hidden

This grade’s own namerecorded in our sources as this grade’s own designation under that standard.

Indicativetaken from a published cross-reference table; a close match, not a guarantee of interchangeability. Verify against the mill certificate before ordering.

Withdrawndesignation no longer current — a separate column from the two above, so a name can be same grade and withdrawn at once.

GOSTRussia / CIS · 4

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

Iron — the balance, never listed by a standard — 87.4 %Cr — 6 %W — 2.9 %Si — 0.8 %Traces & impurities · 3 %

Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade.

Element	% by weight
	0.5–0.6
	0.6–0.9
	0.15–0.45
	≤ 0.03
	≤ 0.03
	5.5–6.5
	0.6–0.9
	≤ 0.4
	0.5–0.8
	2.5–3.2
	≤ 0.3

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 publishedsource text, verbatim	Min% by weight	Max% by weight	Bound
C	0.5 - 0.6	0.500	0.600	Range
Si	0.6 - 0.9	0.600	0.900	Range
P	max 0.03	—	0.030	Max
S	max 0.03	—	0.030	Max
V	0.5 - 0.8	0.500	0.800	Range
Cr	5.5 - 6.5	5.500	6.500	Range
Mn	0.15 - 0.45	0.150	0.450	Range
Ni	max 0.4	—	0.400	Max
Cu	max 0.3	—	0.300	Max
Mo	0.6 - 0.9	0.600	0.900	Range
W	2.5 - 3.2	2.500	3.200	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

This grade's composition falls outside the published model's validated range (a low-alloy composition window), so no transformation temperature is predicted here.

Physical & mechanical properties

Transformation point Ac1875°CExact

Transformation point Ac3905°CExact · Ac3(Acm)

Transformation point Ar1755°CExact

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

2 conditions · 2 values

By heat-treated conditionno delivery state statedsource splav

Heat-treated condition	ReN/mm²
Quenching and drawing	1800 – 2000

By delivery stateno delivery state statedsource splav

Delivery state	HB
6KH6V3MFS ( 6Х6В3МФС ) (annealing) , GOST 5950-2000	255

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.

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 Inquiry Datasheet as PDFPrint-ready A4 documentGenerating …Download startedTry again