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321 stainless steel

Source:Wuxi Xinzheng Special Steel   DateTime:2018-09-18

  Type 321 stainless steel is Ni - Cr - Ti austenitic stainless steel, abrasion resistance, high temperature resistance, creep resistance, etc., used in the manufacture of the lining of wear resistant acid containers and equipment, pipeline, high grain boundary corrosion resistance requirements of the chemical industry, coal, oil field open machine, have difficulty in building materials heat-resistant parts and heat treatment of parts.

  Specification comparison: austenitic stainless steel is equivalent to domestic 1Cr18Ni9Ti

  The American brands are :321, S32100 and TP321 Japanese brand name :SUS321

  British brands :304S12, 321920 German brand :X10CrNiTi189

  Chemical composition

  C:≤ 0.08 Si: ≤1.00 or less Mn: ≤2.00 S: ≤ 0.030

  P: ≤0.045 Cr: 17.00 ~ 19.00 Ni: 9.00 ~ 12.00 Ti: ≥5×C%

  Mechanical properties of

  Tensile strength σb (MPa):≥520

  Conditional yield strength σ0.2 (MPa):≥205

  elongation δ5 (%):≥40

  Reduction of section ψ (%):≥50

  hardness ≤187HB;≤90HRB;≤200HV

  321 stainless steel plate performance

  321 stainless steel plate of Ti as a stabilizing element exists, but it is also a hot steel grade, in high temperature is better than 316 l stainless steel plate. 321 stainless steel plate in different concentration and temperature of organic acid and inorganic acid, especially in oxidizing medium has good abrasion resistance, used in the manufacture of the lining of wear resistant acid containers and equipment and pipelines.

  Type 321 stainless steel plate is Ni - Cr - Mo austenitic stainless steel plate, its performance and 304 stainless steel plate is very similar, but due to join the metal titanium, make its have the better grain boundary corrosion resistance and high temperature strength.The formation of chromium carbide was effectively controlled by the addition of metal titanium.

  The Stress Rupture and mechanical properties of the 321 stainless steel plate are better than that of the 304 stainless steel plate.

  The difference between 321 stainless steel plate and other stainless steel plate

  321 ti

  316 molybdenum

  304 contains neither titanium nor molybdenum

  Mo2Ti contains both molybdenum and titanium. Its performance of 316L is optimal

  Industry application

  1. Oil exhaust combustion pipeline

  2. Engine exhaust pipe

  3. Boiler shell, heat exchanger and heating furnace components

  4. Silencing parts for diesel engines

  5. Boiler pressure vessel

  6. Chemical truck

  7. Expansion joint

  8. Spiral welded pipe for furnace pipe and dryer

  Heat treatment specification

  Solid solution heat treatment specification: 1) 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.3) solid solution temperature should not exceed 1066 ℃, and more than words, must carry out the stabilization treatment, in order to prevent the precipitation of chromium.