Material
We can supply refractory anchors and libra fixing systems to exacting tolerances in a wide range of stainless steel and higher alloys. Standard fixings are available in stainless steel grade (304) and grade (310), & lnconel 601. Other grades of stainless steel, mild steels and alloys are available to suit requirements, including Stainless Steel grade (316).

Standard Stainless Steels provide conosion resistance in a number of aggressive situations. They also provide very good oxidation and scaling resistance at elevated temperatures. In situations where standard steels reach their temperature limits, higher alloy and specially designed stainless steels provide a combination of increased strength and oxidation resistance,extending the useful working range up to higher temperatures around 1200°C.

Refractory fixings are available In a range of stainless steels and higher alloys:

The most widely used stainless steel grade containing typically 18% Chromium and 8% Nickel as the main alloying elements. This grade has excellent welding properties and is easily formed and fabricated.

A heat resisting steel that combines excellent resistance to both corrosion and oxidation at elevated temperatures. It is resistent to moderate thermal shock and shows high strength at high temperatures.

lnconel 601 has an outstanding resistance to corrosion and to high temperature oxidation. The material also has good resistance to aqueous corrosion and high mechanical strength.

Refractory fixings can be supplied inother grades on request, including Stainless Steel grade 1.4401 (316). Please contact AMI for more details.

The resistance to oxidation of stainless steel depends largely on the chromium content. Two other alloying elements, nickel and silicon, can also be instrumental in enhancing the oxidation resistance of the steels. Nickel inthe alloy minimises oxide spalling. Silicon increases oxidation resistance by improving the compaction of the scale formed and thereby allows the steel to be used at higher operating temperatures. Conosion in air or steam occurs relatively slowly due to the formation of acompact adherent chromium oxide basedscale.

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