1: Brief Introduction Of 321/321H Stainless Steel 
321 (UNS S32100) is titanium stabilized austenitic stainless steel plate with good general corrosion resistance. It has
excellent resistance to intergranular corrosion after exposure to temperatures in the chromium carbide precipitation range
of 800 - 1500°F (427 - 816°C). The alloy resists oxidation to 1500°F (816°C) and has higher creep and stress rupture
properties than alloys 304 and 304L. It also possesses good low temperature toughness.
Alloy 321H (UNS S 32109) stainless steel plate is the higher carbon (0.04 - 0.10) version of the alloy. It was developed
for enhanced creep resistance and for higher strength at temperatures above 1000oF (537°C). In most instances, the
carbon content of the plate enables dual certification.
Alloy 321 stainless steel plate cannot be hardened by heat treatment, only by cold working. It can be easily welded and
processed by standard shop fabrication practices.
Alloy 321 stainless steel plate exhibits good general corrosion resistance that is comparable to 304. It was developed for
use in the chromium carbide precipitation range of 1800 - 1500°F (427 - 816°C) where un-stabilized alloys such as 304
are subject to intergranular attack.
The alloy can be used in most diluted organic acids at moderate temperatures and in pure phosphoric acid at lower
temperatures and up to 10% diluted solutions at elevated temperatures. Alloy 321 resists polythionic acid stress corrosion
cracking in hydrocarbon service. It can also be utilized in chloride or fluoride free caustic solutions at moderate temperatures.
Alloy 321 stainless steel plate does not perform well in chloride solutions, even in small concentrations, or in sulfuric acid service.
Other Grades:
201,202,21-4N,301,302,301L,303,303Se,304,304L,304H,304LN,304N,305,S38400,308,309,309S,310,310s,
316,316L,316H,316Ti,316N,316LN,317,317L,317LMN,317LN,321,321H,347,347H,S3100,S31803,S3205,
S32304,S31200,S31260,S32507,405,409,429,430,430F,434,444,403,410S,410,416,420,420F,431F,440A
440B,440C,440F,610,630,631,632,635,660,Alloy 200,Monel 400 ,Alloy K-500 ,Inconel 600 , Incconel 601,
Inconel 625 , Inconel 718 , Alloy 800 ,Alloy 800H,Alloy 800HT,Inconel 825,Alloy 276, Alloy 20, Alloy 59
2: Chemical Composition 3: Stainless Steel Seamless Pipe Or Welded Pipe Process 

4: Stainless Steel Seamless Or Welded Pipe Package 

5: Company Introduction