BS · United Kingdom · 5 designations

BM3

BM3 is a designation in BS for the grade also listed as S6-5-3. We list 5 designations recorded for this grade, in the standards DIN / EN, ASTM, BS, ISO and GB.

Designations 5

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If you came for one of these

The most-used names for this grade.

GBW6Mo5Cr4V3This grade’s own name

Also known as

5 designations · 5 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Withdrawndesignation no longer current — a separate column from the two above, so a name can be same grade and withdrawn at once.

DIN / ENEurope · 1

S6-5-3Indicative

ASTMUnited States · 1

M3-1Indicative

BSUnited Kingdom · 1

BM3Indicative

ISOInternational · 1

HS6-5-3Indicative

GBChina · 1

W6Mo5Cr4V3This grade’s own name

Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here.

Chemical composition

9 elements on file · weight %

What this alloy is

Iron — the balance, never listed by a standard — 79.8 %W — 6.3 %Mo — 5 %Cr — 4.2 %Traces & impurities · 4.8 %

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

Element	% by weight
	1.15–1.25 —
	0.2–0.45
	0.15–0.4
	≤ 0.03
	≤ 0.02
	3.8–4.5
	4.7–5.2
	2.7–3.2 —
	5.9–6.7

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	1.15-1.25	1.150	1.250	Range
Si	0.2-0.45	0.200	0.450	Range
P	≤0.03	—	0.030	Max
S	≤0.02	—	0.020	Max
V	2.7-3.2	2.700	3.200	Range
Cr	3.8-4.5	3.800	4.500	Range
Mn	0.15-0.4	0.150	0.400	Range
Mo	4.7-5.2	4.700	5.200	Range
W	5.9-6.7	5.900	6.700	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.

Physical & mechanical properties

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

0 conditions · 0 values

3 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.

Heat treatment

GB /T 9943-2025

In this orderTest specimen

Preheating800–900 °C
Quenching1190–1210 °C
Quenchant Oil, Salt bath or Nitrogen
Tempering550 °C

Supply condition

AnnealingSupply condition
AnnealingSupply condition
Quenching and TemperingTest specimen

Conditions the standard permits on delivery. No temperature or medium is published for these, so no order and no alternation is implied.

Source: www.caishuku.com

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.

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