Steel AISI 309 relates to a heat-resistant thermally durable alloys. scale formation starts at t ° 600−650 ° C. A significant percentage of nickel and chromium provides excellent oxidation resistance and thermal stability. This type of steel is used in the production of gas, parts of installations for the conversion of methane, pyrolysis oil and chemical industries. It has good ductility and weldability, which expands the scope of its application. AISI 309 also relevant in the resistance heating elements. At t ° above 600−800 ° C due to the formation of scale is prone to embrittlement. Widely used in the high-temperature environments, where necessary corrosion resistance, heat resistance and excellent creep resistance.
|309||<0.20||<1.0||<2.0||<0.045||<0.030||22.0 — 24.0||12.0 — 15.0||The basis|
Mechanical characteristics of AISI 309 steel at room temperature.
|The elastic limit Rp 0,2, (0.2%), N / mm2 (fluidity)||205||280|
|Tensile strength Rp m, N / mm2 (tensile)||515||580|
|A80 the elongation to break in%||40||60|
|Fatigue strength, N / mm2||-||260|
|Brinell Hardness — HB||-||156|
Characteristics at high temperatures
Tensile strength at elevated temperature
|Tensile strength (tensile), Rp m N / mm2||390329||280||230190||140|
|Temperature, ° C||600650||700||750||800||850|
The minimum value of the elastic limit at high temperatures (the scheduled time for the deformation of 1% at a given temperature)
|Temperature, ° C||Time||800||700||650||600||550|
|Rp1,0 1.0% plastic deformation (flow), N / mm2||10,000 hours||10||40||70||100||180|
|Rp1,0 1.0% plastic deformation (flow), N / mm2||100,000 hours||5||25||50||80||120|
The elastic limit before break (strength)
|Temperature, ° C||Time||800||700||650||600||500|
|Stress MPa||1000 h||thirty||70||140||180||270|
|Stress MPa||10,000 h||10||50||90||130||240|
|Stress MPa||100 000 h||5||15||50||90||200|
The maximum recommended service temperature
-with continuous exposure to 1035 ° C;
-with intermittent exposure to 1150 ° C.
Stress Relief (vacation) at t ° 1050 — 1150 ° C and rapid cooling with cold air ensures complete dissolution of carbon. Annealing at 1050 — 1150 ° C by quenching with cold water or air for maximum workability of steel. The temperature at the start of the forging process: 1150 — 1200 ° C, at the end of the process — 950 ° C. Hot working is accompanied by annealing. The time to achieve uniformity of warming up of stainless steel for longer than about 12 carbon time. To ensure smooth distribution of carbon is necessary to decrease the temperature.
|weldable limited||— Welding is possible in the process of heating to 100−120 ° C temperature. and further heat-treated|
|slozhnosvarivaemaya||— To obtain quality welded connections, additional steps of: during welding heating to a temperature of 200−300 ° C, by heat treatment its end|
|no limits||— Carrying out the welding without preheating and subsequent heat treatment.|
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In stock «Elektrovek-steel» company offers a wide range of metal-roll brand AISI 309. Our offices are located in Russia and Ukraine. Making a purchase is possible, without leaving the office, through the Company’s website. The popularity of products of AISI 309 explains the diverse product mix and low cost. All products have the highest quality. Technological equipment for each production stage gives us an opportunity to carry out individual orders in the event that the basic performance of the product does not satisfy you. We make quality custom orders of non-standard options, the timing of their implementation are minimal. When wholesale purchases discounts.