GOST 30245 C235 C345 C390 C440 Welded Steel Tube
Introduction
GOST 30245 is a standard that specifies the requirements for welded steel tubes, particularly square and rectangular shapes, used in construction and various structural applications. This article provides an overview of the material specifications, key features, chemical composition, mechanical properties, steel grades, applications, and possible alternative grades.
Material Specification
The GOST 30245 standard outlines specific requirements for the manufacturing and testing of welded steel tubes, ensuring they meet the necessary quality and performance criteria for structural applications.
Key Features
- Welded Construction: Ensures high strength and durability.
- Versatility: Suitable for various applications in construction and engineering.
- Standardization: Compliance with GOST ensures uniformity and reliability.
- Corrosion Resistance: Depending on the grade, some tubes may offer enhanced resistance to environmental factors.
Chemical Composition
| Steel Grade | C (%) | Si (%) | Mn (%) | P (%) | S (%) | Cr (%) | Ni (%) | Mo (%) |
| C235 | 0.12 | 0.15 | 1.40 | 0.045 | 0.045 | 0.30 | 0.30 | 0.10 |
| C345 | 0.14 | 0.20 | 1.50 | 0.045 | 0.045 | 0.30 | 0.30 | 0.10 |
| C390 | 0.16 | 0.25 | 1.60 | 0.045 | 0.045 | 0.30 | 0.30 | 0.10 |
| C440 | 0.18 | 0.30 | 1.70 | 0.045 | 0.045 | 0.30 | 0.30 | 0.10 |
Mechanical Properties
| Steel Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) | Hardness (HB) |
| C235 | 235 | 360-510 | 24 | 120-160 |
| C345 | 345 | 430-580 | 22 | 140-180 |
| C390 | 390 | 450-600 | 20 | 160-200 |
| C440 | 440 | 490-640 | 18 | 180-220 |
Steel Grade
The GOST 30245 standard includes several steel grades, each with specific properties and applications. The most common grades are C235, C345, C390, and C440, which differ in their chemical composition and mechanical properties.
Application
Welded steel tubes conforming to GOST 30245 are widely used in various applications, including:
- Structural frameworks for buildings and bridges
- Manufacturing of machinery and equipment
- Automotive components
- Furniture and fixtures
- Fencing and railings
Possible Alternative Grades
While GOST 30245 specifies certain grades, alternative grades may also be considered based on specific requirements:
- S235: European equivalent with similar properties.
- A500: American standard for cold-formed welded and seamless structural tubing.
- EN 10219: European standard for cold-formed welded and seamless structural hollow sections.
Haiyan Sanxin Steel Pipe Factory is a leading manufacturer of steel pipes in China. Located in a region with excellent geographical advantages, the factory is situated close to the Zhoushan Port and Ningbo Port.
Our factory covers an area of more than 25,000 square meters and has been in the steel pipe manufacturing business for 20 years. Over this period, we have accumulated a wealth of professional experience, which has helped us establish ourselves as a trusted name in the industry.
At our factory, we specialize in the production of various types of steel pipes, including stainless steel pipe, carbon steel pipe, copper pipe, steel pipe,seamless steel pipe and welded pipe. Our expertise in this field is evident from the 12 patents that we hold, which demonstrate our commitment to innovation and excellence.
Q: Are you trading company or manufacturer ?
A: manufacturer,also can do trading.
Q: How long is your delivery time?
A: Generally speaking,it is 10-15 days if the goods are in stock,or it is 30-40 days if the goods are not in stock, it is according to quantity.
Q: Do you provide samples? is it free or extra ?
A: Yes, we could offer the sample for free charge but need pay the cost of freight.
Q: What is your terms of payment ?
A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shippment.
If you have another question, pls feel free to contact with me.
Product Tags:
|
|
GOST 30245 C235 Welded Steel Tube Square And Rectangular Steel Tube For Building Images
|
