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.