How to Buy AISI 4140 Steel?
How to Buy AISI 4140 Steel
AISI 4140 STEEL BUYING GUIDE
Are you in the market to buy AISI 4140 steel but you’re not sure of the reasons why you need it? If yes, here now we have prepared a comprehensive guide that will give you an overview of its properties, composition, applications, and much more.
4140 steel is known for its versatility and strength. Read our expert guide to get more insights on AISI 4140 steel. Following are the queries that you might have in your mind regarding the 4140 steel before buying.
By the end of this guide, you’ll not only be skilled to look at and distinguish 4140 steel, you will also have the knowledge in finding the best source for it.
WHAT IS AISI 4140 STEEL GRADE DESIGNATION?
To understand the AISI 4140 steel properties, it is important to understand what the grade numbers in it mean. Following is the AISI 4140 steel grade designation:
4: The first number ‘4’ indicates that the steel is ‘Molybdenum’ steel and Molybdenum is most important alloy element for this steel as compared to other steel series. For example the steel series
1XXX: Carbon steel
5XXX: Chromium steel
1: The second number ‘1’ indicates that this steel has Chromium element as the secondary alloy.For example the steel series as below
40XX: Mo 0.20-0.25%
44XX: Mo 0.40-0.52%
41XX: Cr 0.50-0.95%, Mo 0.12-0.30%
40: The last two numbers ‘40’ indicates the amount of carbon present in the steel. For this grade it has 0.40% carbon compared with AISI 4130 steel which has 0.30% carbon.
WHAT ARE EQUIVALENT GRADES FOR AISI 4140 STEEL？
We can see the international equivalent grades as below.Compared with AISI 4140 Steel,each country adjust chemical composition to meet their actual requirement.It is also a good way to replace the material with similar grade.
| Standard | Grade | C | Si | Mn | P | S | Cr | Mo |
| ASTM A29 | 4140 | 0.38-0.43 | 0.15-0.35 | 0.75-1.00 | ≤ 0.035 | ≤ 0.04 | 0.8-1.1 | 0.15-0.25 |
| EN10083 | 42CrMo4 | 0.38-0.45 | ≤ 0.4 | 0.6-0.90 | ≤ 0.025 | ≤ 0.035 | 0.9-1.2 | 0.15-0.30 |
| 1.7225 | ||||||||
| JIS G4105 | SCM440 | 0.38-0.43 | 0.15-0.35 | 0.6-0.85 | ≤ 0.035 | ≤ 0.04 | 0.9-1.2 | 0.15-0.30 |
| GB 3077 | 42CrMo | 0.38-0.45 | 0.17-0.37 | 0.5-0.80 | ≤ 0.035 | ≤ 0.035 | 0.9-1.2 | 0.15-0.25 |
| BS 970 | EN19 | 0.35-0.45 | 0.15-0.35 | 0.5-0.80 | ≤ 0.035 | ≤ 0.035 | 0.9-1.5 | 0.2-0.40 |
Fushun Special Steel LTD CO
Fushun Metal is a large special steel manufacturer and supplier. We are metal experts and have been providing quality customer service and products since 1998.
At Fushun Metal, we supply a wide range of metals for a variety of applications. Our products/stock includes: stainless steel, alloy steel, spring steel, tool steel, high speed steel, mould steel, nickel alloy.
Our hot rolled and cold rolled steel is available in a wide range of shapes including: bars, tubes, sheets and plates. We can cut metal to your exact specifications.
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