Marine Environment Erw SS Seamless Pipe 2B 4k HL Mirror Sch5s

Stainless steel grade grouping:

200 series - Chrome-nickel-manganese austenitic stainless steel

300 series - Chrome-nickel austenitic stainless steel

Model 301 -- Good ductility for molding products.It can also be quickly hardened by mechanical processing.Good weldability.The wear resistance and fatigue strength are better than 304 stainless steel.

Model 302 -- Corrosion resistance is the same as 304, with better strength due to relatively high carbon content.

Model 303 - Easier to machined than 304 by adding a small amount of sulfur and phosphorus.

Model 304 - General model;So 18/8 stainless steel.The GB brand is 0Cr18Ni9.

Model 309 -- Better temperature resistance than 304.

Type 316 -- the second most widely used steel after 304, used in the food industry and surgical equipment, has molybdenum added to give it a special structure that is resistant to corrosion.It is also used as "Marine steel" because of its better resistance to chloride corrosion than 304.SS316 is usually used in nuclear fuel reprocessing units.Grade 18/10 stainless steel is also usually qualified for this application class.[1]

Model 321 -- Similar to 304 except that titanium is added to reduce the risk of weld corrosion.

400 series -- ferrite and martensitic stainless steel

Model 408 -- Good heat resistance, weak corrosion resistance, 11% Cr, 8% Ni.

Model 409 -- cheapest model (British and American), usually used as automobile exhaust pipe, made of ferritic stainless steel (chrome).

Model 410 -- Martensite (high strength chromium steel), good wear resistance, poor corrosion resistance.

Model 416 - Sulphur is added to improve the machined properties of the material.

Model 420 -- "blade grade" Martensitic steel, similar to brinell high chromium steel, the earliest stainless steel.Also used for surgical knives, which can be made very bright.

Model 430 -- Ferritic stainless steel, for decorative use, e.g. for automotive accessories.Good formability, but poor temperature and corrosion resistance.

Model 440 -- High strength cutting steel, slightly high in carbon, with proper heat treatment to achieve a high yield strength up to 58HRC, one of the hardest stainless steels.The most common example is the "razor blade".There are three common models: 440A, 440B, 440C, and 440F (easy to process).

Series 500 - Heat resistant chromium alloy steel.

600 series - Martensite precipitation hardened stainless steel.

Model 630 -- The most commonly used precipitation hardened stainless steel model, also commonly called 17-4;4% 17% Cr, Ni.

Stainless steel seamless pipe is a hollow circular steel, has been widely used in petroleum, chemical, medical, food, light industry, mechanical instrumentation and other industrial pipelines and mechanical structural parts.And in the bending, torsional strength of the same material, because the weight is relatively light, so it is widely used in the manufacture of some parts and engineering structures, but also used to produce a variety of conventional weapons, gun barrels, shells and so on.

Specification Sheet