Melt Extracted Stainless Steel Fiber
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Chemical composition
Steel Grade C Si S P Mn Ni Cr Mo V Cu Ti Co B 446 <0.30 <3.0 <0.03 <0.04 1.0~1.5 0.45 24-27 - - <0.25 - -<0.003
The Specification Of Melt-extraction SSF
Specification Cross-section areas(mm2
) Equivalent diameter(mm) Cross-section size(mm) Length(mm) Configuration & shape 0.5*20 0.2 0.5 0.2*1 20 Straight 0.5*25 25 0.5*35 35Technical Properties And Performance
Alloy 446 Melt temperature range ºC ~ Thermal conductivity @ 540ºC Kcal/m2
· h · ºC 69.8 Modulus of elasticity @ 870ºC × 106
kg/cm ² 0.984 Fiber tensile strength @ 870ºC kg/cm ² 540 Coef. of thermal expansion @870ºC × 10-6
/ºC 13.14 Critical oxidation temperature ºCIncreased flexural strength of 60% alumina
Refractory fired at 870ºC(ºF)for 8hrs 1.3.V% fiber
1.15 Increased energy absorption 60% alumina ref. fired at 870ºC(ºF) for 8 hrs 10-12 Carburization increase in carbon content% in 25 hrs @982ºC(ºF) 0.07 Corrosion rate in Coke oven gas at 982ºC(ºF) Mils/yr 14 Corrosion rate nitriding Mils/yr Oxidation cycling coditions hrs wt % loss @ 982ºC(ºF) 4%
The properties and performance of refractory materials applying to various beating furnaces kilns and coke ovens should be greatly improved if SSF will be mixed with.
Today SSF reinforcement is finding its way into every parts of modern industries. They can be concluded as follow:
1)Metallurgical industry
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blast-heating cupola, iron smelting furnaces, open hearth furnaces, convertors electrical furnaces, spray gun for refining of metal out of furnace, sintering furnaces and kilns. heaters for steel rolling, including lining, furnace-door and wrapping covers around water cycling pipes.
2)Oil oven, and kilns.
3)Furnaces and kilns in ceramic,glass and enamel industries.
4)Rotary and standing kilns in cement industry.
5)Forging heaters and boilers for power plant.
6)Furnaces and kilns in other industries.
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Melt Extract steel fiber reinforce refractory castable against cracking to extend and enhance refractory lifetimes. The steel fibers can be added to all monolithic refractories, from insulating to ultra low cement refractory castable, ramming materials & moldable, precast shapes, gunning and shot creting mixes. Steel fiber reinforced refractories are now commonplace in a wide range of high temperature processing industries.
NR melt extract steel fiber impart increased strength and resistance to thermal cycling, steep thermal gradients and mechanical shock, minimizing damage and delaying failure caused by cracking. By increasing refractory lifetimes, steel fiber refractory reinforcement (SFRR) offers the end user a reduction in downtime and substantial savings in materials and labor costs.
Melt extract steel fiber are spun directly from the melt using the company&#;s advanced melt extraction and melt overflow processes. Rapid cooling of the fiber during manufacture (equivalent to 50, 000 per second) &#;freezes&#; the metallurgical structure, capturing it in an optimum state to resist high temperature corrosion &#; a state which is impossible for conventionally cast steel to match.
The processing maximizes the effective distribution of the primary nickel and/or chromium alloying elements throughout the fiber while simultaneously minimizing grain size. When coupled with sunshine&#;s skill of blending non-standard levels of performance-enhancing key trace elements to the melt, a unique range of dedicated refractory fiber alloys have been produced which provide outstanding oxidation resistance and unmatched performance at elevated temperature.
Mainly used for reinforcement of refractory products in various industries, such as Petrochemical, steel, chemical, power station, cement and rock industries, etc.
Refractory operating conditions :
&#; High thermal cycling or
&#; Continuous fibre soaking temperature up to oC in refractory
&#; Moderate mechanical shock
&#; High temperature oxidation resistance
Our fiber technology helps extend refractory life and offers added benefits such as outstanding spalling resistance, superb fracture toughness, better abrasion resistance, superior thermal and mechanical shock resistance and uniform alloying characteristics. Use of NR fiber substantially improves refractory durability and performance, and reduces refractory installation, maintenance and material.
Except the melt extract steel fiber, refractory steel anchors are used for castable refractory reinforcement, the anchors hold the refractory lining on the shell of industrial furnaces. we have refractory anchors listed below are made with grades like Inconel, nickel chromium steel, SS 310, 316, 304 and any other grades. &#; V &#; waved shapes are designed in order to insure the best anchoring of the castable lining, when this one has dimensional variations due to ambient temperature evolution and mechanical stress as well. Several types are available in respect of their way of fixing and if they anchor a single layer or a multi layer lining. [ V anchors, Y anchors, Corrugated Anchors ]
Wire mesh is also used for the refractory reinforcement for castable or refractory concrete.