Grade AISI 314
It refers to the temperature-resistant heat-resistant steel. The recommended use temperature — up to 800 ° C. In the temperature range 600−800 ° C steel due to the formation of scale is prone to embrittlement. Intensive scale formation starts at t ° 1050 ° C. The high content of nickel and chromium provides excellent oxidation resistance and high strength at high temperature. This brand — is very plastic and has good weldability.
Manufacturing plant parts for the conversion of methane, pyrolysis oil and chemical industry, combustion chambers and gas pipelines. AISI 314 also can be used in the heating resistance elements. This type of steel is widely used in all the surrounding high-temperature environments, where necessary corrosion resistance, heat resistance and excellent creep resistance.
The chemical composition, in percent.
|314||<2.0||1.5 — 3.0||<0.25||23.0 — 26.0||<0.030||<0.045||19.0 — 22.0||The basis|
|20×25n20s2||<1.5||2,0 3,0||<0.20||24.0 — 27.0||<0.020||<0.035||18.0 — 21.0||<0.2||<0.3||<0.2||The basis||<0.2||<0.3|
|1.4841||<2.0||1.5 — 2.5||<0.20||24.0 — 26.0||<0.015||<0.045||19.0 — 21.0||<0.11||The basis|
The maximum recommended service temperature
intermittent exposure to 1035 ° C
Continuous exposure to 1150 ° C
Characteristics at high temperatures
Tensile strength at elevated temperature
|Tensile strength (tensile), Rp m N / mm2||390||329||280||230||190||140|
|Temperature, ° C||600||650||700||750||800||850|
Mechanical characteristics of AISI 314 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|
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|
Stress Relief (vacation) at t ° 1050 — 1150 ° C and rapid cooling water ensures complete dissolution of carbon. Annealing at 1010 — 1120 ° C, quenching in water or cool air for maximum workability of steel. The best corrosion resistance is achieved by annealing 1070 ° C and rapid cooling. 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.
This steel is both strong and ductile. Cold treatments include stretching forming, bending, rotary and deep drawing. When cold working is applied are the same tools and techniques, as for a carbon steel. However, applied mechanical forces increase by 1.5−2 times. This is due to hardening of austenitic steel with the molding.
processing technology provides that the workpiece is subjected to during the 'braking' hoods. The walls of the workpiece thinner, so the molding in order to avoid gaps used heat treatable steel.
Rotary and deep drawing
When this deep drawing press on the workpiece does not stretch that does not happen often in practice, the material passes freely between the rollers. For example, when drawing household utensils forming always a stretch. In this alloy for deep drawing, must be different minimum degree of hardening, that is, to be as stable and the rate of Md30 (N) must be «in the red». For the production of stainless steel kitchen appliances typically used so-called Sub-analysis of stainless steel, as in the production of cooking pots by deep drawing. Rotary drawing on metal-spinning machine is forming a turning. are standard objects of use, for example, a bucket or similar symmetrical cone products that usually do not polish.
Steel AISI 314 is easily weldable. Generally, the heat treatment after welding is not required. But, at the risk of intergranular corrosion is performed additional annealing at t ° 1050−1150 ° C. The welding seam must be cleaned chemically and mechanically descaled and then passivated by means of etching paste.
We supply certified products brand AISI 314. The technical documentation includes data on the chemical composition, limiting the percentage of impurities; mechanical properties of products. We can buy in bulk, any semi-finished products for large-scale productions. We also offer optimal conditions for retail customers. High level of service and efficiency of service are the face of our company.
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