GB · China · 1 designation

4Cr2Mn1MoS

4Cr2Mn1MoS is a grade designated under GB. Its recorded composition includes C 0.35–0.45%, Si 0.3–0.5%, Cr 1.8–2%, Mn 1.4–1.6% and Cu ≤ 0.25%. No cross-standard equivalents are recorded for this grade yet. Recorded mechanical properties include HB ≤ 235.

Designations 1

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Chemical composition

8 elements on file · weight %

What this alloy is

Iron — the balance, never listed by a standard — 95.2 %Cr — 1.9 %Mn — 1.5 %C — 0.4 %Traces & impurities · 1 %

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

Element	% by weight
	0.35–0.45
	0.3–0.5
	1.4–1.6
	≤ 0.03
	0.05–0.1 —
	1.8–2
	0.15–0.25
	≤ 0.25

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	0.35-0.45	0.350	0.450	Range
Si	0.3-0.5	0.300	0.500	Range
P	≤0.03	—	0.030	Max
S	0.05-0.1	0.050	0.100	Range
Cr	1.8-2	1.800	2.000	Range
Mn	1.4-1.6	1.400	1.600	Range
Cu	≤0.25	—	0.250	Max
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

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

1 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 1299-2025

Single operationTest specimen

Quenching830–870 °C
Cooling Oil

Supply condition

AnnealingSupply condition

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

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