ASTM · United States · 3 designations

5145

ML45Cr is a grade designated under GB. Its recorded composition includes C 0.43–0.48%, Si 0.1–0.3%, P ≤ 0.025%, Cr 0.9–1.2% and Mn 0.6–0.9%. We list 2 designations recorded for this grade, in the standards ASTM and JIS.

Designations 3

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If you came for one of these

The most-used names for this grade.

GBML45CrThis grade’s own name

Also known as

3 designations · 3 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Withdrawndesignation no longer current — a separate column from the two above, so a name can be same grade and withdrawn at once.

ASTMUnited States · 1

5145Indicative

JISJapan · 1

SCr445Indicative

GBChina · 1

ML45CrThis 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

6 elements on file · weight %

What this alloy is

Iron — the balance, never listed by a standard — 97.5 %Cr — 1.1 %Mn — 0.8 %C — 0.5 %Traces & impurities · 0.3 %

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

Element	% by weight
	0.43–0.48
	0.1–0.3
	0.6–0.9
	≤ 0.025
	≤ 0.025
	0.9–1.2

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	0.43-0.48	0.430	0.480	Range
Si	0.1-0.3	0.100	0.300	Range
P	≤0.025	—	0.025	Max
S	≤0.025	—	0.025	Max
Cr	0.9-1.2	0.900	1.200	Range
Mn	0.6-0.9	0.600	0.900	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, Mo.

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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