ASTM A312 TP304L Stainless Steel for Petrochemical Application

ASTM A312 TP304L Stainless Steel for Petrochemical Application

TONG CHUANG GROUP deal with Austenitic Stainless Steel， Nickel Alloy Steel(Hastelloy ， Monel， Inconel， Incoloy ) seamless and welded pipe and tube already more than 33 years， every year sell more than 80000 tons of steel pipe and tube. Our client already cover more than 55 countries， Like Italy， UK， Gernmany， USA， Canada， Chile， Colombia， Saudi Arabia， Korea， Singapore， Austrial， Poland， France ， ….And our group branch company and factory have been already approved by :ABS， DNV， GL， BV， PED 97/23/EC， AD2000-WO， GOST9941-81， CCS， TS， CNNC， ISO9001-2008， ISO 14001-2004.
 
Description
 
Grade304 is the standard "18/8" stainless; it is the most versatile and most widely used stainless steel， available in a wider range of products， forms and finishes than any other. It has excellent forming and welding characteristics.. It is an austenitic stainless steel and has chromium content in it. This makes the ASTM A312 Grade Tp304l corrosion resistant. This quality is desired in most applications.
The grade 304L can be used in mild chemicals with less acidity and less oxidation and reduction capacity. Food and beverages industries often deal with mild acids like carbonic acids， citric acid and tartaric acids. These are found in food items and are mild acids that do not corrode the 304L Pipe. The material has 18% chromium and 8% nickel along with other additions but with less carbon than the ordinary SS304 Pipe material.
 
304L is a variant of 304 stainless steel with lower carbon content and is used where welding is required. The lower carbon content minimizes the precipitation of carbides in the heat-affected zone near the weld， and the precipitation of carbides may cause stainless steel to produce intergranular corrosion (welding erosion) in certain environments.
304L stainless steel has poor forging performance and difficult deformation.
Due to work hardening. So that the amount of deformation in the process of mandrel drawing can not be too large. And the heat loss is large. Therefore， it must be formed under many fires. If the high temperature holding stage is not handled well， it will cause coarse crystals.
 
 
Chemical Composition

 
Mechanical Properties
 

 
Physical Properties 
 

 
Equivalent Grade
 

 
Inspection & Tests
 

Visual examination， dimensional inspection， PMI chemical analysis， tensile test， flattening test， bend test， eddy-current test， etching test， radiographic examination (for welded pipes)， intergranular corrosion test (upon request).
 
Apllication
 

The grade 304L steel can be made into plates， sheets， and coils to be used in the following:

• Food processing equipment， particularly in beer brewing， milk processing & wine making
• Kitchen benches， sinks， troughs， equipment and appliances
• Architectural panelling， railings & trim
• Chemical containers， including for transport
• Heat Exchangers
• Woven or welded screens for mining， quarrying & water filtration
• Threaded fasteners
• Springs