Automotive Tube manufacturers

7,895 €
Posted on
22 May 2023
( 7 days ago )
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Automotive Tube manufacturers ASTM A519 seamless tubing covers several grades of carbon and alloy steel seamless tubing. A519 4130 and 4140 tubing are two kinds of alloy steel which are commonly used as raw materials in the automotive industry.
A519 4130 is a kind of low alloy steel which contains molybdenum and chromium as strengthening component. The carbon content of 4130 tubing is between 0.28% to 0.33%, as the carbon content is relatively low, 4130 steel tube is good for fusion weld. This material can be hardened by heat treatment.
AISI 4140 tube is medium carbon alloy steel tube, which is widely used for general purpose applications that require high tensile strength and toughness. The addition of chromium and molybdenum, along with heat treatment contribute to the combined advantage of hardness, ductility, and strength. Typical application in the automotive industry for 4140 mechanical tubing is rotor shaft.
Dingxin has been producing 4130 tubing and 4140 tubing for around 20 years and enjoy premium quality reputation from many international clients.

Product Details

Product nameASTM A519 SAE AISI 4130 4140 QT seamless tubing
StandardASTM A519
MaterialSAE 4130 4140
DimensionOD: 16-245mm, WT1-32mm, Length: 3-6m
Delivery conditionCold worked, Stress Relieved, Normalized, Annealed, Quenched and tempered
CertificateISO 9001, IATF 16949
ApplicationsAutomotive parts
PackagingLong pipe: hexagonal bundles with steel-hooped.
Short cut pipes: wooden box or metal frame

Chemical composition

Steel GradeCMnPSSiCrMo

Mechanical properties

Steel GradeDelivery conditionTensile strength (Mpa)Yield strength (Mpa)Elongation
No less than
4130Stress relieved鈮?24鈮?86鈮?0
4140Stress relieved鈮?55鈮?89鈮?0


鈼?Excellent mechanical properties
鈼?Qualified round bar from leading mills such as Xingcheng special steel, Baosteel, Shijiazhuang steel, etc. which ensures excellent microstructure
鈼?High dimensional accuracy for inner diameter, outer diameter
鈼?Qualified decarburization within clients鈥?requirements
鈼?100% non-destructive eddy current test


1. Q: Are you a trading company or manufacturer?
聽 聽 聽A: Dingxin is a profession steel tube manufacturer locating in Jiaxing City, Zhejiang Province.

2. Q: How long is your delivery time?
聽 聽 聽A: As Dingxin manufacture pipes based on client鈥檚 specific needs, it takes 30-40 days to produce 4130 steel tube and 4140 mechanical tubing after receiving orders from clients.

3. Q: What is your term of payment?
聽 聽 聽A: 30% advance payment, 70% balance against B/L copy or Letter