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AISI 309S, 1.4833 pipe

AISI 309S, 1.4833 pipe

The basic qualities

Heat-resistant and heat-resistant steel AISI 309S has a broad scope, for example, the heating elements of the resistance. This steel is prone to embrittlement due to the formation of oxides at a temperature of 600−800°C, and the start of intensive scaling occurs at t° 1050 °C. At high temperature, high Nickel content with chromium provides high strength and excellent oxidation resistance. AISI 309S has a light weldability — which gives it wide application. The use of steel is recommended for temperatures up to 1000 °C.

Scope

AISI 309 S relevant in the production of various parts operated at high temperatures and lightly condition (furnace conveyors, furnace fittings, boxes for carburizing at temperatures of up to 950°C), metallurgical, mining, chemical, oil and gas. Also steel grade AISI 309 S used in the heating elements of the resistance. It is widely used in all environments at high temperatures, where it is necessary high corrosion resistance, excellent creep resistance and heat resistance.

The percentage 309 S.

counterparts, and brand Ti V Cu N Ni Fe Mo S P Mn C Cr Si
1.4833       <0,11 12,0 — 14,0 Basis   <0,015 <0,045 <2,0 <0,15 22,0 — 24,0 <1,0
20x23н13   <0,2 Of <1.00   12,0 — 15,0 Basis <0,3 <0,025 <0,035 <2,0 <0,20 22,0 — 25,0 <1,0
309S <0,2       12,0 — 15,0 Basis   <0,030 <0,045 <2,0 <0,08 22,0 — 24,0 <1,5

With high temperatures steel

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

Mechanical characteristics at room temperature steel 309S.

Features At least Typical
The elastic limit. N/mm2 Rp 0,2, (0.2%), (turnover) 205 280
Limit durable. m Rp N/mm2(tensile) 515 580
The relative elongation A80 to break in % 40 60
Fatigue resistance, N/mm2 - 260
Brinell hardness — HB - 156

The minimum value of the limit of elasticity at high temperature (strain B1% for a set time at a given temperature).

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

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 maximum temperature of the service. recommended.

the impact of continuous 1150°C

intermittent exposure 1035°C

Code:
-Partial protection is equal to 1. The corrosion rate 100m to 1000 mm/year.

— High degree of protection equal to 0. The corrosion rate of 100 mm/year.

— Non resistant equal to 2. The corrosion rate свыше1000 mm/year.

Treatment of thermal

The range of forging. The beginning of the process t°. — 1150 — 1260 °C, the end of the process. t°.900−925°C. the Period of time estimated to obtain a homogeneous heating of 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°1020 — 1120 °C, cooling and the sharp intake of cool air, providing maximum ductility of the steel.

Treatment cold

Due to its strength, this steel finds a variety of use. Typical operations include bending, forming by stretching, rotating and deep hood. At the time of molding using the same tools as for carbon steels. In this case, it will take much more effort is approximately 1.5−2 times. This makes babout thegreater degree of hardening when forming austenitic steel, but in certain cases may also serve as a negative factor.

Hood Rotogravure

During deep drawing of the workpiece to the press was not subjected to «braking», and give freely to pass in the instruments in practice, however, this happens not so often. For example, always takes place forming with stretching in the manufacture of the cookware. The material, which is subjected to deep drawing must have when forming a low degree of hardening, i.e. to be stable at the maximum, and the rate of Md30 (N) have to be «in the red». For kitchens stainless steel appliances are typically used so-called sub-tests of stainless steel stock as in the production of pots by deep drawing. In flow-forming machine rotary extractor means forming with the turning.

Forming, stretching

In the period of forming, stretching is subjected to a preset «inhibition». Its walls become very thin during forming, to avoid a gap, preferably of steel to provide the characteristics of high strengthening.

Welding

Steel AISI 309S lends itself to easy welding. Heat treatment, usually after welding is not required. But, at the risk of intergranular corrosion at the temperature. 1050−1150°C to produce additional autogenie. Seam welding must be cleaned of chemical and mechanical means from scale, passivated etching paste its end.

Buy at best price

The company «AVEK global» sells a range of products from steel AISI 309 S. 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.