Seamless Steel Pipe 12"X0.875" ASTM A355 P91ASTM B36.10 Carbon Alloy Steel Round Pipe

Seamless Steel Pipe 12"X0.875" ASTM A355 P91ASTM B36.10 Carbon Alloy Steel Round Pipe

Introduction

Stainless steel seamless steel pipe is a kind of long steel with hollow section and no joints around. Stainless steel seamless pipe

Features of stainless steel seamless pipe:

First, the thicker the wall thickness of the product is, the more economical and practical it is. The thinner the wall thickness is, the higher the processing cost will be; Secondly, the process of the product determines its limited performance. Generally, the precision of seamless steel pipe is low: uneven wall thickness, low brightness on the inner and outer surfaces of the pipe, high sizing cost, and pockmarks and black spots on the inner and outer surfaces are not easy to remove; Third, its detection and shaping must be handled offline. Therefore, it shows its advantages in high pressure, high strength and mechanical structure materials.

Duplex stainless steel has about half of ferrite phase and half of austenite phase in its solid solution structure. Generally, the content of small phase should reach 30%. With low C content, Cr content is 18%~28% and Ni content is 3%~10%. Some steels also contain alloy elements such as Mo, Cu, Nb, Ti and N.

Classification of duplex stainless steel:

1. Low alloy type

It indicates the grade (23Cr-4Ni-0.1N). There is no molybdenum in the steel. PREN (pitting resistance equivalent) is 24-25. It can replace AISI304 or 316 for stress corrosion.

2. Alloy

Representative grade (22Cr-5Ni-3Mo-0.15N), PREN (pitting resistance equivalent) is AISI 316L and the corrosion resistance between 6% Mo N austenitic stainless steel is 32-33.

3. High alloy type

It generally contains 25% Cr, molybdenum and nitrogen, copper and tungsten. Standard grade (25Cr-6Ni-3Mo-2Cu-0.2N), PREN (pitting equivalent) is 38-39, and the corrosion resistance of this steel is higher than that of duplex stainless steel with 22% Cr.

4. Super duplex stainless steel

The standard grade (25Cr-7Ni-3.7Mo-0.3N) and PREN (pitting resistance equivalent) are greater than 40, which are suitable for demanding medium conditions and have good corrosion resistance and mechanical properties, comparable to super austenitic stainless steel.

A335P91 is a material of high pressure and high temperature resistant steel. P91 bars, plates, pipes, pipe fittings, p91 is generally called A355P91, which is equivalent to the national standard 10Cr9Mo1VNb. It is a material of high pressure and high temperature resistant steel pipes. The American standard is ASME SA-335/SA335M. The tensile strength is ≥ 585 (MPa), the yield strength is ≥ 415 (MPa), and the elongation is ≥ 20 (%). P91 is characterized by the thinning of the pipe wall thickness. In terms of materials, the amount of materials used is reduced by more than 40% compared with other steels, and the cost of materials and installation is saved by more than 30%. As the self weight of P91 pipe is reduced, the load of supports and hangers is also relatively reduced, which is convenient to support and lift, and convenient to design and install.

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