cr18ni9ti stainless steel is ordinary stainless steel.
9 1 1 cr18ni9ti is carbon chromium and nickel titanium, 1, 18, 9 represent carbon (‰), chromium (%), the content of nickel (%) is one of China's stainless steel grades.  
Chemical composition
Carbon C: 0.12% or less.   
Si Si: 1.00% or less.   
Manganese Mn: 2.00% or less.   
S: sulfur 0.030% or less.  
P P: 0.035% or less.    
Chromium Cr: 17.00 ~ 19.00%.    
Ni Ni: 8.00 ~ 11.00%.    
Ti Ti: 0.50 ~ 0.80%.  
Industry standard
Heat treatment specification and metallographic organization: heat treatment specification: 1) solid solution 920 ~ 1150 ℃ cold quickly;2) stabilization processing according to buyer's request and heat treatment temperature of 850 ~ 850 ℃, but it must be noted in the contract.Metallographic organization: organizational characteristics of austenite in shape.Delivery status: general with heat treatment state delivery, its heat treatment type specified in the contract;Not specified, the heat treatment state delivery.  
Mechanical properties of
Tensile strength of sigma b (MN/m2) > = 550 yield strength sigma s (MN/m2) > = 200 elongation delta (%) > = 40 bits of shrinkage (%) > = 55 hardness: 187 hb or less;90 HRB or less;200 hv or less
Our 1 cr18ni9ti AISI321 equivalent of the United States, 0 cr18ni9 equivalent of AISI304, 1 302, 0 cr18ni9 Cr17Ni12Mo2 AISI316
1 cr18ni9ti X7CrNiTi18-321 = = China Taiwan international standard 10 = 12 Russian x18h10t SUS321 = = Japan Germany X6CrNi18-10 = the United States ASTM A276 321 when used for the high temperature of 700 ℃, 1 cr18ni9ti should be competent, because it is not only an austenitic stainless steel, and application of a wide range of austenite steel body is strong, but had better not exceed 750 ℃, its heat treatment for solid solution treatment, namely, heated to 1000 ℃ above, heat preservation time after water quenching, again USES the above temperature 60 ~ 100 ℃ for aging.

And the difference between 0 cr18ni9
Both the carbon content of different, 1 cr18ni9ti is high.The content of chromium, nickel, were 18% and 9%, respectively.    
In this case, because the 0 cr18ni9 carbon content is low, low intensity from 1 cr18ni9ti, corrosion resistance is better than 1 cr18ni9ti.But because 1 cr18ni9ti contain grain boundary corrosion resistance of titanium, so you can improve it by heat treatment of the grain boundary corrosion resistance.    
At room temperature under normal can substitute.    
Generally speaking, 1 cr18ni9ti is the backward production technology of stainless steel products.As countries around the world in order to improve the production process of stainless steel, has become obsolete products.In view of China's national conditions, some places still retain, but belongs to the grade of steel is not recommended.Really need to use 1 cr18ni9ti, can also be changed to 0 cr18ni11ti.Use of Ti 0 0 cr18ni9 cr18ni11ti or without Ti, depends on whether the use environment of stainless steel intergranular corrosion environment.0 cr18ni9ti stainless steel pipe introduction 0 cr18ni9ti contain intergranular corrosion resistance of titanium, has good resistance to intercrystalline corrosion resistance and cold stamping performance, the oxidizing acid such as nitric acid has strong corrosion resistance, and most of the organic acid and inorganic acid in alkaline solution also has certain corrosion resistance. 
use
0 cr18ni9ti is dosage the biggest, the most widely stainless steel grades, the production of stainless steel production accounted for about 30% above, used in the manufacture of deep drawing forming parts, acid pipeline, and the acid storage containers, storage tank, also can be used for chromium and chromium nickel stainless steel stainless steel electrode material, non-magnetic missing parts and low temperature environment and acid conveying pipe, containers, etc.  
Chemical composition
0.07 Mn: 0.07 Si: C: ≦ ≦ ≦ 2.00 P: 0.035 S: ≦ ≦ Ni 0.030:8.00-11.00 Cr: 17.00 to 19.00
Physical constants
Melting point: 1398-1454 ℃ density: 7.85 g/cm3 elastic modulus: (20 ℃) heat capacity 199 gpa: 0.5 x 1000 j/(kg. K) thermal conductivity: 0.15 x 100 w/(cm. K) than resistance: the uN.m0.73