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08kh18n10t - 1.4541 - AISI 321 tube

08kh18n10t - 1.4541 - AISI 321 tube

The basic qualities

Steel AISI 321 refers to a group corrosion resistant steels heat resistant heat resistant resistant to sulfur-containing environments. Temperature recommended when using steel is of the order of 600−800°C, its service life is very long. Steel AISI 321 with welding in environments mildly corrosive is not susceptible to intergranular corrosion. This quality AISI 321 brings in alloy titanium. Welded steel AISI 321 in spite of this, should never be used in highly oxidizing environments.

Application

Steel grade AISI 321 is used in various fields of industry. From it produce welded equipment: retorts, muffles, furnace parts fittings, heat exchangers, pipes, exhaust systems, manifolds, electrodes incendiary spark candles.

The chemical composition of AISI 321. Mass fraction in percent.

  Si (max) Cr P (max) Ni Mn (max) Ti S (max) C (max)
AISI 321 1,0 17,0−19,0 0,045 8,00−11,0 2,0 5*C-0,5 0,015 0,10

Heat treatment: Quenching at 1020 — 1100ºC. Air cooling.

HB 10−1 = 179 MPa — Hardness steel

7900−8200 Kg/m3 is the Density

Welding of steel: no restrictions

Mechanical characteristics of steel AISI 321 at room temperature.

Properties At least Typical
Brinell hardness — HB - 163
Limit durable. m Rp, N/mm2 (tension) 515 580
Fatigue resistance, N/mm2 - 260
The relative elongation A80 to break in % 40 60
The elastic limit. N/mm2 Rp 0,2, (0.2%), (turnover) 205 280

Characteristics of AISI 321 at high temperatures

Elasticity until failure (yielding)

Time Temperature,°C 800 700 650 600 500
h 10 000 MPa Stress 10 50 90 130 240
h 1 000 MPa Stress 30 70 140 180 270
h 100 000 MPa Stress 5 15 50 90 200

The tensile strength at high temperatures

Strength limit N/mm2 (tension), Rp m 390 280 329 230 190 140
Temperature in °C 600 650 700 750 800 850

The minimum value at high temperatures the elastic limit (within a set time warp B1% of set temperatures)

Temperature,°C Time 800 700 650 600 550
plastic deformation Rp1,0 to 1.0% (turnover) in N/mm2 100 000 h 5 25 50 80 120
plastic deformation Rp1,0 to 1.0% (turnover) in N/mm2 10 000 h 10 40 70 100 180

Scale formation at temperatures

Recommended maximum temperature service.

continuous exposure to 900°C

intermittent exposure to 810°C

Welding

Welding steel AISI 321 is good, however, due to impurities of titanium harder than steel 304/ 304L. For welding the electrodes used series 347 (stable — Nb), which has in comparison with steel 308L improved creep resistance in environments with working temperatures above 400 °C.

Treatment of thermal

Rashkovka starts at t°. 1150 — 1250 °C, and ends. at t°.900−925°C. a Period sufficient for uniform heating of the stainless steels longer than carbon-12. Relief (or release) method of autogene without showing deposition of carbide is in a temperature range of 450−800o C. thus, the departure from microlimano possible corrosion. Gradual lowering of the temperature necessary to safeguard the allocation of carbon. The annealing is carried out at t°1050 — 1150 °C cooling and the sharp intake of cool air, providing maximum ductility of the steel.

Rental σв (MPa) Eg. Size σт (MPa) KCU (kJ.m2) ψ?(%) δ5 (%)
Thick sheet 520     210     43
The wire is annealed 1400−1600   ø 8       20
Hot tubes. 510           40
Forgings 490     196   40 35
Rod 490   ø 60 196   55 40
Rod 490   ø 60 196   55 40

Application

Manufacture oil refining equipment, industrial equipment operated at high temperatures in the chemical industry. Steel grade AISI 321 is used in various industries in the manufacture of welded equipment (muffles, furnace parts fittings, heat exchangers, pipes, retorts, in the manufacture of exhaust systems, manifolds, electrodes incendiary spark candles). Steel grade AISI 321 can also be widely used in food industry, textile, pharmaceutical and paper industry.

Buy at best price

The company «AVEK global» sells a range of products from steel AISI 321. The popularity of this type of products due high quality products, great variety and real value. Every our products undergoes strict control throughout the production chain, to guarantee absolute high quality of our steel products. Modern technological capabilities at any stage of production provide the opportunity to carry out individual orders in the absence of a required item in the basic version. The company «AVEK global» is always ready to produce quality products according to individual order.