MSZ · Hungary · 13 designations

NCMo4

NCMo4 is a designation in MSZ for the material held under material number 1.6510, also listed as 39NiCrMo3. It is a material in the category Others. We list 13 designations recorded for this grade, in the standards DIN / EN, BS, AFNOR, UNE, GOST, UNI, PN and MSZ.

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If you came for one of these

The most-used names for this grade.

DIN / EN39NiCrMo3This grade’s own name

About Others

These are miscellaneous metallic alloys that do not fit a more specific material family and may be based on iron, nickel, cobalt, copper or other alloy systems. They are selected for applications requiring particular combinations of strength, hardness, toughness, wear resistance or resistance to demanding service conditions.

This describes the material class as a whole. Always confirm the individual grade against the standard before ordering.

Also known as

13 designations · 8 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Withdrawndesignation no longer current — a separate column from the two above, so a name can be same grade and withdrawn at once.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

39NiCrMo3This grade’s own name

BSUnited Kingdom · 1

816M40Indicative

AFNORFrance · 1

40NCD3Indicative

UNESpain · 2

GOSTRussia / CIS · 3

UNIItaly · 3

PNPoland · 1

38HNMIndicative

MSZHungary · 1

NCMo4Indicative

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

Chemical composition

8 elements on file · weight %

What this alloy is

Iron — the balance, never listed by a standard — 96.7 %Ni — 0.9 %Cr — 0.8 %Mn — 0.7 %Traces & impurities · 1.1 %

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

Element	% by weight
	0.35–0.43
	≤ 0.4
	0.5–0.8
	0.025
	0.035
	0.6–1
	0.15–0.25
	0.7–1

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	0,35-0,43	0.350	0.430	Range
Si	≤0,40	—	0.400	Max
P	0,025	0.025	0.025	Exact
S	0,035	0.035	0.035	Exact
Cr	0,60-1,00	0.600	1.000	Range
Mn	0,50-0,80	0.500	0.800	Range
Ni	0,70-1,00	0.700	1.000	Range
Mo	0,15-0,25	0.150	0.250	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

computed from composition · °C

Predicted Ae3765°C

Predicted Ae1729°C

Predicted Acm620°C

Predicted Bs525°C

These four temperatures are a CALCULATION from this grade's own composition, using the published Li, Niebuhr, Meekisho & Atteridge (1998) model — never a measurement, and computed from the UPPER BOUND of each element's specified range, not a mid-range figure. Where this grade also has a measured transformation point (Ac1, Ac3, Ar1, Ar3) on file, it is shown separately, in Physical & mechanical properties, and is never replaced by the predicted figures here — Ae (predicted, equilibrium) and Ac/Ar (measured, on heating or cooling) are different physical quantities and can differ by tens of degrees; a mismatch between the two is not an error in either.

Physical & mechanical properties

Density7,85g/cm³Exact

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 · 6 values

By thicknessQuenched and tempered · round productssource steelnumber

Thicknessmm	A% · Lo = 5,65 √So
≤ 16	11
16 – 40	11
40 – 100	12
100 – 160	12
160 – 250	13

By delivery stateSoft annealedsource steelnumber

Delivery state	HB
Soft annealed	240

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 1.6, a shared category, and a published range for Ni / Cr 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.

G18NiMoCr3-61.6759

Ni 0,60-1,00 · Cr 0,40-0,90