SHANGHAI UNITE STEEL
One-stop Brand Service Provider For Globle Machinery And Petrochemical Enterprise And Special Steel Distributor.
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DIN 2391 Seamless Cold Drawn Steel Tube Alloy steel for Mechanical Parts 4340
Introduction
| Outer diameters: | 10-500mm |
| Wall thickness: | 2-50mm |
| Length : | 1-15m |
| Packaging; | 1. by bundles, each bundle weight under 3 tons, for small outer diameter seamless steel pipe, each bundle with 4 - 8 steel strips. 2. after making by bundle, covered with Polyethylene waterproof cloth. 3. make black paints painting on each pipe, then make bundles |
| Delivery time; | 7days for stock, 15-35 days for new production |
| Port: | Shanghai China |
Applications
Seamless steel pipe for low and medium pressure boiler,high pressure boiler and ship-building, liquid service, petroleum cracking,chemical fertilizer equipment, drawing-oil-equipment and structure purpose.
Chemical Composition and Mechanical Properties
| Steel Grade | C | Mn | Cr | Mo | Ni | Si | P | S | Yield strength | Tensile strength | Elongation% |
| AISI 4340 | 0.38-0.43 | 0.60-0.80 | 0.18 | 0.70-0.90 | 1.65-2.00 | 0.20-0.30 | 0.035 max | 0.040 max | 835 min | 980 min | 12 min |
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
Techniques
Cold Drawn
Delivery Condition
BKS, NBK, BK and BKW
Dimension Tolerance
| I.D tolerance (mm) | O.D tolerance (mm) | I.D Roughness (µm) | Straightness (mm/meter) |
| H7-H9 | -/+0.5% | 0.10-0.80 | 0.2-0.80 |
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
Package
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
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.