4340 alloy steel plate - Henan Seed Steel Metal Materials Co., Ltd.

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4340 alloy steel plate

Name:4340 alloy steel plate

Material:4340 alloy steel, A4340,ASTM/AISI 4340 steel plate

Standard:AISI ASTM

Thickness:Thickness: 6-80mm, Width: 1360-3000mm, Length: 6000-12000mm


DeliveryTime:15-30 day,depend on quantity

PaymentTerms:100% payment against B/L copy,the original documents will be mailed after payment received


4340 alloy steel plate/sheet

4340 is a low alloy, nickel chromium molybdenum steel capable of being heat treated to high strength levels. The alloy has a good combination of ducility, toughness and strength along with high hardenability.

The Specialty Steel Products are available upon request and all stock is subject to mill availability. SDJS Steel representative will assist all customer requests for these products.

Delivery Condition

AR(As Hot Rolled), N(Normalized), T(Tempered), Q(Quenched), TMCP, Q+T(Quenched and Tempered), UT(Ultrasonic Test:ASTM A435,ASTM A578-C/B/A,EN10160-S0E1,S1E2,S2E3,S3E4), Impact Test, PWHT(Post Weld Heat Treatment), HIC, Z Test(Z15, Z25, Z35)

Chemical Composition of 4340 alloy steel sheet










0.38 - 0.43

0.70 - 0.90

0.65 - 0.85

0.20 - 0.30

1.65 - 2.00

0.04 Max.

0.04 Max.

0.15 - 0.30

Mechanical Properties of 4340 alloy steel plate


  tensile streng Reh -MPa

            Yield Strength




       Section shrinkage


             A4340                  745                      470                 22%                        55%

Steel products delivery guarantee:

1. According to the standard of container shipment.

2. Steel packaging is moistureproof and abrasionproof.

3. The ship is low safety risk, arrives quickly, and delivery in time.

1.DO you have factory?

We act as main distributors of goverment owned mills, and we have our own machining centers for cutting and simple machining jobs.

2.Where is your factory?

Our representative mills located in Henan, Shangdong, Jiangxi, Guangdong provinces,etc.

3.Can you send us the sample?

It should be according to our stock status and samples are available when we have suitable stocks.

4.How about the delivery time?

Normally we can keep 40 days in average with mill run schedule, for stocks within 10 days. All delivery terms are on basis to Chinese loading port.

5.What payment terms can you accept?

T/T or L/C. For special requests about the payment, please indicate us first then we will check the availability.

7, What is your MOQ?

MOQ for mill run should meet 5tons per size in normal condtions, which should follow the schedules of our mills when inquiry time.

8, What is your shipping port?

Tianjin, Shanghai, Qingdao, etc. All loading ports in China are ok for us.

9,Could i visit the factory by myself?

Surely you can, please inform us your plan in advance so we can arrange some people to take you have a look around our mills/ factories.

10.Can you give me the Manufactory Test Certificate?

For sure we can supply some samples for your reference.

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