4130 STEEL SHEET .090 X 6 X 12

Part# 03-24600
Part No.
.0906 x 1203-24600


Formerly MIL-S-18729C
This chromium-molybdenum alloy is one of the most widely used aircraft steels because of its combination of weldability, ease of fabrication and mild hardenability. It will respond to heat treatment to high strength levels and yet, in the annealed condition, it has adequate strength for many applications. Used for the manufacture of parts and components.

Tensile strength 75,000-85,000 PSI. Sheared to sheet and strip sizes listed below. Subject to availability of normalized sheet, annealed 4130 sheet may be substituted. Less 10% discount on 6 sheets 18" x 36" or 3 sheets of 18" x 72" per part number.

If Mfg. Test Reports are required, there's a minimum $15.00 charge per order. Please indicate P/N 01-01133 in the Special Instructions Box during the checkout process.

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Exactly what I ordered

Wayne K Verified Purchase

4130 STEEL SHEET .090 X 6 X 12

May 12, 2022

nice sheet, impressive packaging , prompt delivery as usual.

Jay C
April 27, 2021

Exactly what I ordered and delivered quickly!

Don Y
April 23, 2021

good product and fast receiving

Sylvain S
April 15, 2021

As described and arrived on time. So nice to be able to buy specific thicknesses in small quantities.

February 8, 2021

Exactly what I wanted for making lightweight components that I can nitride heat-treat for more strength and reduced flexibility.

Edward G
November 24, 2020

Goods as ordered delivered promptly, with better prices than the on-line metal shops. Thanks!

Arthur M
November 20, 2020

As described and amazing packing.

Chiru C
October 30, 2020

I was able to purchase 3 .125 x 6 x 12 pieces of 4130 CM, and it was shipped USPS saving me a lot in shipping charges.

Mike F
September 2, 2020

Well packed for shipping thank you.

July 1, 2020


Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: Does the 0.050 4130 sheet certification include AN-QQ-S-685

It is not listed on the Cert. Test report reads: AMS6345B Normalized or otherwise Heat Treated(Successor to MIL-S-18729) Chemestry to ASTM A505 & A506

Q: Are these 4130 steel sheets domestic material?

Yes, this is domestic material.

Q: Which dimension quoted does the grain direction run on the 4130 steel sheets?

The grain runs the long dimension.

Q: Is this 4130 sheet annealed or normalized?


Q: The description says that Annealed sheet may be substituted for Normalized. Is there any way for me to know up front if Im going to get annealed, or normalized sheet?

Yes, you can use special instructions in the shopping cart to notate that you need annealed.

Q: Does the grain run length wise on P/N 03-19500-6?

Yes, it does.

Q: Is this 4130 sheet made in USA?

Yes it is.

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