Sign In | Join Free | My
One-stop Brand Service Provider For Globle Machinery And Petrochemical Enterprise And Special Steel Distributor.
Active Member

6 Years

Home > Cold Rolled Steel Tube >

Hollow Alloy Steel Tube Cold Rolled Steel Pipe Tube 4135 Seamless


Hollow Alloy Steel Tube Cold Rolled Steel Pipe Tube 4135 Seamless

Brand Name : UST

Model Number : OD: 10-150mm; WT: 2-25mm

Certification : ISO 9001

Place of Origin : China

MOQ : MOQ: 2-3 ton

Price : USD 700- 2000/ton

Supply Ability : 3000 ton/month

Delivery Time : Within 15-35 days

Packaging Details : Plastic plugs in both ends, Hexagonal bundles of max 2,000kg with several steel strips, Two tags on each bundle, Wrapped in waterproof paper, PVC sleeve, and sackcloth with several steel strips.

Usage : Automobile

Production Technique : Hot rolled/cold rolled

Quality Standard : DIN 2391, EN10305

Surface : Black, Bright, Smooth

Delivery Condition : BKS, NBK,BK ,BKW, GBK(+A), NBK(+N), BK(+C)

Product name : Alloy steel tube ST52/S355JR

Contact Now

ST52/S355JR high precision cold rolled steel tube for automobile, OD: 10-150mm; WT: 2-25mm


Cold drawn seamless has closer dimensional tolerances, better surface finish and higher mechanical properties than corresponding grades of hot finished seamless.


High Precision Cold Rolled Seamless Steel Tube is used in automotive industry, and in the occasion where the high accuracy, brightness, cleanness of the tube are required.

Quality Standards

DIN 2391 Seamless Precison Steel Tubes

BS6323 Specification for Seamless and Welded Steel Tubes for Automobile, Mechanical and General Engineering Purposes

ASTM A519 Standard Specification for Seamless Carbon and Alloy Steel Mechanical Tubing

Steel Grades

DIN Standard: St35, St52
BS Standard: CFS 4, CFS 5, CFS 10
ASTM Standard: 1020, 1045, 4130

Size Range

Outer Diameter: 10-150 mm

Wall Thickness: 2-25 mm

Length Random Length, Fixed Length, etc.

Dimension Tolerance

I.D tolerance (mm)O.D tolerance (mm)I.D Roughness (µm)Straightness (mm/meter)

Chemical Composition(%)

ST350.17 max0.35 max0.40 max0.025 max0.025 max//
ST420.21 max0.35 max0.40 max0.025 max0.025 max//
ST52 (DIN1.0580)0.22 max0.55 max1.60 max0.025 max0.025 max//

Delivery Conditions

+C (BK) Hard. No final treatment after final cold rolling.
+LC (BKW) Soft. Final heat treatment is followed by a suitable drawing pass (limited reduction of area).
+SR (BKS) Stress Relieved. After final cold rolling, the tubes are stress relieved in a controlled atmosphere.
+A (GBK) Annealed. After final cold rolling, the tubes are annealed in a controlled atmosphere.
+N (NBK) Normalized. After final cold rolling, the tubes are normalized in a controlled atmosphere.

Mechanical Properties( T=20°C if not differently stated )

GradesDelivery ConditionsTensile Strength Rm (Mpa)Yield Strength R2 (Mpa)Elongation in the longitudinal direction Al (%)
St 52+C (BK)640 min/4 min
St 52+LC (BKW)580 min/7 min
St 52+SR (BKS)580 min420 min10 min
St 52+A (GBK)490 min/22 min
St 52+N (NBK)490-630355 min22 min

Our Services

Third Party inspection acceptable. such as SGS, BV etc.

Supplying financial support with usance L/C 180 days after B/L date.

What we can offer?

-We offer a wide range of steel products in a wide variety of dimensions and executions, according to the common international specifications or customize.

-Machining and heat treatment are available.

-Also, we advise you in choosing the right materials.

Quality Assurance

Below inspection will be done in the production.
(1) ray detection---RT;
(2) ultrasonic testing---UT;
(3) Magnetic Particle Testing-MT;
(4) penetration testing-PT;
(5) eddy current flaw detection-ET


In standard export packing and seaworthy material with hexagon shape bundle, covered with tarpaulin, in containers or in bulk, or upon request

Payment & Delivery

1. Both T/T and L/C will be acceptable

2. Trade Terms: FOB, CIF, CFR

3. The delivery will be in 10-15 days if have stock; For customized items, the delivery will be negotiated by both parties

4. Shipping by sea freight from Shanghai Port (PRC) for Bulk orders, by airfreight or express for samples

Company Information

Shanghai Unite Steel Trading Co., Ltd

We are committed to integrate engineering steel resources in china and serve the global engineering steel market. Our company has more than 15 years of experience in steel researching, production, managing and sales. And our team mostly are based on and worked in national famous steel enterprise.

In the aspect of resources and information, we have established cooperative and stronger relationship with nearly hundred enterprises, either state-owned or private owned in china.

What’s more, we have built long, deep and close business relationship with dozens of steel company, Sharing and holding equities with several steel enterprises. Because of the close cooperation with steel companies and our pioneering spirit, which can ensure us stay at the top competition, and ensure our customers get what they really want!


Q: Are you a manufacturer or merely a trader?
A: We are group of companies and owned manufacturer bases and trading company. We specialized in special steel which include alloy structural steel and carbon steel and stainless steel, etc. All material are with high quality and competitive price.

Q: How do you guarantee the quality of your product?
A: Firstly, we can provide the certificates from the third party, such as TUV, CE, if you need. Secondly, we have a complete set of inspection system and every process is checked by QC. Quality is the lifeline of enterprise survival.

Q: Delivery time?
A: We have ready stock for most of material grades in our warehouse. If the material doesn't have stock, the delivery lead time is about 5-30 days after receiving your prepayment or firm order.

Q: What is the payment term?
A: T/T or L/C.

Q: Can we visit your company and factory?
A: Yes, warmly welcome! We can book the hotel for you before you come to China and arrange our driver to our airport to pick you up when you come.

Product Tags:

cold rolled seamless steel pipe


Alloy cold galvanized steel pipe


hollow rolled stainless steel tubing

Cheap Hollow Alloy Steel Tube Cold Rolled Steel Pipe Tube 4135 Seamless for sale

Hollow Alloy Steel Tube Cold Rolled Steel Pipe Tube 4135 Seamless Images

Inquiry Cart 0
Send your message to this supplier
Characters Remaining: (0/3000)