ČSN · Czechia · 2 designations

16223PH

16223PH is a designation in ČSN for the grade also listed as 12ChN3A. We list 2 designations recorded for this grade, in the standards GOST and ČSN.

Designations 2

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If you came for one of these

The most-used names for this grade.

GOST12ChN3AThis grade’s own name · 3 grades on that route

Also known as

2 designations · 2 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Withdrawndesignation no longer current — a separate column from the two above, so a name can be same grade and withdrawn at once.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 · 1

12ChN3AThis grade’s own name

ČSNCzechia · 1

16223PHIndicative

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

Chemical composition

12 elements on file · weight %

What this alloy is

Iron — the balance, never listed by a standard — 94.7 %Ni — 3 %Cr — 0.8 %Mn — 0.4 %Traces & impurities · 1.2 %

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

Element	% by weight
	0.09–0.16
	0.17–0.37
	0.3–0.6
	≤ 0.025
	≤ 0.025
	0.6–0.9
	≤ 0.15
	2.75–3.15
	≤ 0.05
	≤ 0.2
	≤ 0.3
	≤ 0.03

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	0.09 - 0.16	0.090	0.160	Range
Si	0.17 - 0.37	0.170	0.370	Range
P	<0.025	—	0.025	Max
S	<0.025	—	0.025	Max
Ti	<0.03	—	0.030	Max
V	<0.05	—	0.050	Max
Cr	0.6 - 0.9	0.600	0.900	Range
Mn	0.3 - 0.6	0.300	0.600	Range
Ni	2.75 - 3.15	2.750	3.150	Range
Cu	<0.30	—	0.300	Max
Mo	<0.15	—	0.150	Max
W	<0.20	—	0.200	Max

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 Ae3776°C

Predicted Ae1698°C

Predicted Acm403°C

Predicted Bs523°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

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.

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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