SteelEquivalents.com

Explore

MaterialsSteel materials by standardCategoriesSteel material categoriesSearchSteel grade searchCalculatorsSteel calculatorsServicesCutting, machining and finishing to order
Latest news
Knowledge & SafetySteel WikiGrades, standards and metallurgy explained
Help & SupportContactGet in touch with the teamFAQCommon questions answeredSupport Chat pageFAQs, guides & live chat in one place
Settings

Appearance

Accent

Language

Welcome

Sign in to save favorites and manage your account.

GB · China · 3 designations

ML45CrMo

ML45CrMo is a designation in GB for the grade also listed as 4145. We list 3 designations recorded for this grade, in the standards ASTM, JIS and GB.

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Withdrawndesignation no longer current — a separate column from the two above, so a name can be same grade and withdrawn at once.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
JISJapan · 1
GBChina · 1
  • ML45CrMoThis 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

7 elements on file · weight %

What this alloy is

Iron — the balance, never listed by a standard — 97.3 %Cr — 1.1 %Mn — 0.8 %C — 0.5 %Traces & impurities · 0.5 %

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
0.15–0.3
CarbonSiliconManganesePhosphorusSulfurChromiumMolybdenum
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.

ElementAs publishedsource text, verbatimMin% by weightMax% by weightBound
C0.43-0.480.4300.480Range
Si0.1-0.30.1000.300Range
P≤0.0250.025Max
S≤0.0250.025Max
Cr0.9-1.20.9001.200Range
Mn0.6-0.90.6000.900Range
Mo0.15-0.30.1500.300Range

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.

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.