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What are the types of stainless steel elbows?

Aug. 08, 2019

What are the types of stainless steel elbows? What is the difference between stainless steel elbows and carbon steel elbows? Here the Stainless Steel Pipe Fittings supplier would like to share with us.

Stainless steel elbow is different from carbon steel elbow is the main difference in material, its chemical composition will keep elbow surface for a long time will not rust, will not be corroded. Stainless steel is usually on the basis of carbon steel with a high proportion of Cr, Ni and other alloys, the content of more than 20%. The common steel types are: 304,304 L, 321,316,316 L, 1Cr18Ni9Ti,0cr18ni9. The first few steel Numbers expressed by Numbers are Japanese, and the steel Numbers are expressed by methods, while the latter (1Cr18Ni9Ti) is the domestic steel Numbers.

Stainless steel elbow classification:

Austenitic stainless steel

The matrix is mainly austenitic (gamma-phase) with a face centered cube structure, which is non-magnetic and is mainly reinforced (and may cause some magnetism) by cold processing.

Austenitic - ferritic (duplex) stainless steel

The matrix has both austenite and ferrite phases (the content of less phase is generally more than 15%), magnetic, can be strengthened by cold processing of stainless steel.

Iron body stainless steel

The matrix is mainly composed of a body - centered, cubic, crystalline ferrite structure (alpha phase). It is magnetic and generally cannot be hardened by heat treatment, but can be slightly strengthened by cold working.

Stainless steel elbow

Stainless Steel Elbow

Martensite stainless steel

Stainless steel with martensitic matrix and magnetic structure, whose mechanical properties can be adjusted by heat treatment.

Precipitation-hardened stainless steel

Stainless steel whose matrix is austenitic or martensite structure and can be hardened by precipitation hardening (also known as aging hardening).

Stainless steel

1Cr18Ni9Ti 0Cr18Ni9 00Cr19Ni10 0Cr17Ni12Mo2Ti 00Cr17Ni14Mo2 304 304L 316 316L et al

National standard for stainless steel pipe fittings:

Standard number description

GB/ t12459-2005 steel butt welded seamless pipe fitting

GB/ t13401-2005 butt welded pipe fittings made of steel plate

Forged steel socket welded pipe fitting

Forged steel pipe fittings with threaded threads

Gb9112-9131 gasket for steel pipe flange, flange cover and flange

SH 3409 steel plate butt welding fittings

SH 3408 steel butt welded seamless pipe fitting

Butt welded pipe fittings made of steel SY/T 0510

Seamless butt welded pipe fittings for carbon steel and low alloy steel HG/T21635

Japanese standard for pipe fittings:

Standard number description

JIS B2311 universal steel butt welded pipe fitting

JIS B2312 steel butt welded pipe fitting

JIS B2313 steel plate butt welded pipe fitting

JIS B2316 steel socket welded pipe fitting

It can be translated into:

1. Manufacturing standards can be divided into national standards, electrical standards, water standards, American standards, German standards, Japanese standards, Russian standards, etc.

2. Manufacturing methods can be divided into pushing, pressing, forging, casting, etc.

Stainless steel elbow features:

In practical application, often called the weak corrosive medium corrosion resistant steel stainless steel, and called the resistance to chemical corrosion medium steel acid-resistant steel. Due to the chemical composition on the difference between the two, the former is not resistant to chemical corrosion medium, while the latter are generally not rust. The corrosion resistance of stainless steel depends on the steel alloying elements. It contains chromium is the basic element of the stainless steel for corrosion resistance, while about 1.2% chromium content in steel, chromium and oxygen effect of corrosive medium, in the steel surface to form a thin layer of oxide film ( Since the passivation film), but to prevent further corrosion of steel substrate. In addition to the chromium, the commonly used alloying elements and nickel, molybdenum, titanium, niobium, copper, nitrogen, etc, in order to meet the requirements of various applications on the microstructure and mechanical properties of stainless steel. Stainless steel bend strength, toughness index is good in all kinds of steel, its outstanding advantage is corrosion resistant, in chemical corrosion strong occasions such as papermaking using stainless steel, of course, cost is higher!