0Cr18Ni10Ti stainless steel standards, grades, characteristics and uses

0Cr18Ni10Ti stainless steel standard, grade, characteristics, use
0Cr18Ni10Ti stainless steel is also known as 321 stainless steel, 06Cr18Ni11Ti stainless steel.
0Cr18Ni10Ti stainless steel international name: 321, UNS S32100, TP321, SUS321, 1.4541
implementation standard: ASTM A240/ASME SA-240, ASTM A276, ASTM A182/ASME SA-182, ASTM A312/ASMES A312
main components: carbon (C) ≤ 0.08, manganese (Mn) ≤ 2.0, nickel (Ni) 9.0 ~ 12.0, silicon (Si) ≤ 1.0, chromium (Cr) 17.0 ~ 19.0, sulfur (S) ≤ 0.030, phosphorus (P) ≤ 0.035 ,Titanium (TI) 5C～0.7
Physical properties: 321 stainless steel density: 7.98g/cm3
Mechanical properties: Tensile strength: σb≥520Mpa, yield strength σb≥205Mpa: Elongation: δ≥40%, hardness ≤187 (HB)
Corrosion resistance and main use environment:
0Cr18Ni10Ti stainless steel is Ni-Cr-Mo type austenitic stainless steel, its performance is very similar to 304, but due to the addition of metal titanium, it has better resistance to intergranular corrosion and high temperature strength. Due to the addition of metal titanium, it effectively controls the formation of chromium carbide.
321 austenitic stainless steel has good corrosion resistance in the atmosphere and is widely used in industries such as petrochemicals, electricity, bridges and automobiles. However, the "stainlessness" of stainless steel is not absolute. Due to the special service environment, stainless steel will also corrode. Factors such as medium concentration, pH value, and temperature will have a great impact on the corrosion resistance of stainless steel. For example, if stainless steel is used for a long time in the sensitization temperature range of 450~850℃, intergranular corrosion will occur. The mechanism is that C combines with Cr at the grain boundary to form Cr23C6 and precipitate, which reduces the Cr content at the grain boundary. This is the so-called "chromium depletion". The Cr element is one of the main elements that inhibit intergranular corrosion. When the Cr content at the grain boundary is less than 12%, the probability of intergranular corrosion will increase.
Application areas include: oil and gas industry equipment; offshore platforms, heat exchangers, underwater equipment, fire fighting equipment; chemical processing industry, utensils and pipeline industry; desalination, high-pressure RO equipment and submarine pipelines; energy industry such as power plant desulfurization and denitrification FGD system, industrial scrubbing system, absorption tower; mechanical parts (high strength, corrosion resistance, wear resistance parts).


0Cr18Ni10Ti is a kind of stainless steel. It adds Ti element to 304 steel to prevent intergranular corrosion; it is suitable for use at temperatures of 430℃~900℃. It is used in aircraft, exhaust pipes, boiler drums, etc.
Its properties are as follows:
1. Chemical composition:
Carbon C: ≤0.08
Silicon Si: ≤1.00
Manganese Mn: ≤2.00
Sulfur S: ≤0.030
Phosphorus P: ≤0.035
Chromium Cr: 17.00～19.00
Nickel Ni: 9.00～12.00
Titanium Ti: =5x(c%-0.02)~0.8
2. Mechanical properties
Tensile strength σb (MPa): ≥520Conditional
yield strength σ0.2 (MPa): ≥205
Elongation δ5 (%): ≥40
Sectional shrinkage ψ (%): ≥50
Hardness: ≤187HB; ≤90HRB; ≤200HV
06Cr18Ni11Ti Chemical composition
TP321 The chemical composition of the new and old brands is the same, 06Cr18Ni11Ti and 0Cr18Ni10Ti can replace each other.