Austenitic stainless steel AISI 904L also called «superaustenitic» because characterized by high corrosion resistance in aggressive environments. Relevance in the oil and gas, chemical, pulp and paper industry in the production of welded pieces, heat-exchange valves, reactors, tanks, pipelines, working at t ° to 80 ° C, the equipment for the synthesis of compound fertilizers. This steel is also used for welding electrodes, all kinds of hardware connections: pipe fittings equipment housings, joints and pipes in devices for repairing welded joints equipments operating in radioactive environments. AISI 904L serves as a cladding layer of the hot rolling sheet of two-layer corrosion. It has good resistance to sea water warm. Resistance to stress corrosion cracking provides a high nickel content. Copper confers resistance to sulfuric and others. Acids, especially in very aggressive medium concentration range.
Steel AISI 904L easily welded by any conventional means. Typically, there is no need for preheating and post weld heat treatment.
The percentage of
|904L||≤0,06||≤0,8||≤0,8||≤0,035||≤0,02||22 — 25||26 — 29||2.5 — 3||0.5 — 0.9||2.5 — 3.5||36.885||46.5|
Mechanical characteristics of steel AISI 904L at room temperature.
|The elastic limit Rp 0,2, (0.2%), N / mm2 (fluidity)||220|
|Tensile strength Rp m, N / mm2 (tensile)||490|
|A80 the elongation to break in%||35|
|Fatigue strength, N / mm2||260|
|Brinell Hardness — HB||95|
Characteristics at high temperatures
Tensile strength at elevated temperature
|Tensile strength (tensile), Rp m N / mm2||390||329||280||230||190||140|
|Temperature, ° C||650||600||700||750||800||850|
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 minimum value of the elastic limit at high temperatures (deformation during the interval c1% 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 maximum recommended service temperature
intermittent exposure to 1035 ° C
Continuous exposure to 1150 ° C
1. The annealing temperature 1050 — 1150 ° C by quenching with cold air provides maximum strength steel.
2. Stress Relief (release) is performed by annealing in the range of t ° 450−800 ° C, to avoid the formation of carbide grains, which provokes the corrosion at grain boundaries.
3. forging range. First process temperature 1150 — 1250 ° C, at the end — about 950 ° C.
Time designed to achieve uniformity of warming up of stainless steel for longer than carbon — about 12 times. To ensure smooth distribution of carbon is necessary to decrease the temperature.
ogranicheniy- welding without implementation without further heating and thermal treatment.
Buy at the best price
In stock company «Elektrovek-steel» offers a wide range of stainless steel. Our offices are located in Russia and Ukraine. Making a purchase is possible, without leaving the office, through the Company’s website. Popularity grade AISI 904L is due to a variety of 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.