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We offer steel and steel fabrication services

We are a first-class steel service center with industry-leading technology, offering a wide range of steel and processing services to our customers.

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May Qin： 8618913010472 / [email protected]

4340 alloy steel plate advantage

Our company produces and sells various types of steel products. This website only displays some products. If you have further needs, please fill in the form or contact us via email.

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Product Categories

Steel Plate
Steel Pipe
Steel Coil
Steel Rod
Steel Section
Steel wire

4340 alloy steel plate chemical composition

StandardGradeCMnPSSiNiCrMo
ASTM A2943400.38-0.430.60-0.800.0350.0400.15-0.351.65-2.000.70-0.900.20-0.30
EN 1025036CrNiMo4/1.65110.32-0.400.50-0.800.0350.035≦0.400.90-1.200.90-1.20.15-0.30
BS 970EN24/817M400.36-0.440.45-0.700.0350.0400.1-0.401.3-1.71.00-1.400.20-0.35
JIS G4103SNCM 439/SNCM80.36-0.430.60-0.900.0300.0300.15-0.351.60-2.000.60-1.000.15-0.30

4340 alloy steel plate Mechanical Properties

PropertiesMetricImperial
Thermal expansion co-efficient (20°C/68°F, specimen oil hardened, 600°C (1110°F) temper12.3 µm/m°C6.83 µin/in°F
Thermal conductivity (typical steel)44.5 W/mK309 BTU in/hr.ft².°F

4340 alloy steel plate specification

Product Name

4340 Alloy steel plate

Thickness

8mm-150mm

Length

1m-14m or according to customer's special request

width

1000mm-4000mm

Material grade

AISI 4140, 4130, 5140, 5120，4340

surface

Blackface

Standard

ASTM, GB, AISI

Certificate

MTC

Delivery times

Delivered within 30 days after the receipt of deposit

Package

tied up with steel strips and wrapped with water proof paper

Application Range

Widely used in transportation, construction, decoration, equipment around the base plate, machinery, shipbuilding and other fields

Advantages

1. Reasonable price with excellent quality
2. Abundant stock and prompt delivery
3. Rich supply and export experience, sincere service


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APPLICATION FIELD

Industries We Proudly Serve

Building Construction
Building Construction
Specific requests for on-site construction are generally required and we will work with our clients to meet their needs.
Oil & Gas
Oil & Gas
We supply high strength steel to the oil and gas industry and our equipment is customized to cut advanced high strength steel for the oil and gas industry.
Medica Equipment
Medica Equipment
Loong Stainless Steel supplies hospital beds and related furniture applications that require low micro surface finishes for plating applications.
Spaceflight
Spaceflight
Our high-quality steels and aircraft-grade metals also play an important role in specialty aerospace parts.
Agriculture
Agriculture
Loong Stainless Steel has been a proud supplier of steel to the agriculture and farming industry, and we understand the ups and downs that the industry has experienced.
Heavy Equipment
Heavy Equipment
We also supply several exercise equipment manufacturers with special high surface quality and high strength applications.

FAQ

We are a well known worldwide exporter of 304 Stainless Steel P
Q : What are your payment terms?
A : Our payment terms: 30% T/T deposit and 70% on B/L copy or L/C at sight, before you pay the balance. We will show you product and packaging photos.
Q : How long is your delivery time?
A : Generally, it takes 10-15 working days for stock, and 20-30 working days if there is no stock. According to the order quantity
Q : Can you accept customization?
A : Yes. Can be customized according to customer requirements
Q : How about the MOQ? If my first order is small, will you accept it?
A : We will try our best to support your trial order quantity, so even if it is 1 piece or 1 kg, we can start cooperation; because we are confident to make a second order with the company.
Q : How about your after-sales service?
A : As a professional steel export company, we provide promotion and technical support for all questions and questions.
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Customer Service

To provide you with the most professional assistance.

Loong Stainless Steel has extensive industry experience, an expert staff, and state-of-the-art equipment.

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Have any needs, feel free to contact us, we are happy to help you!

Office: 6F,ShunJing Trade Center,No.855,Industrial Avenue South, Haizhu District, Guangzhou, China(Mainland)

Factory：Pojubian Industrial Road, Zhangcha East, Chancheng District, Foshan, Guangdong

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