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Specification for 4 per cent nickel-chromium-molybdenum steel (Air hardening). (1545 MPa- limiting ruling section 63.5mm). Original standard BS 4S 28-1964 + A3-2015 in PDF full version. Additional info + preview on request

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Methods of Test for cryolite - Part 8- Determination of calcium content. Original standard BS 5050-8-1980 (1999) ISO 3391-1976 in PDF full version. Additional info + preview on request

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Methods of Test for sodium fluoride for industrial use - Part 4- Preparation and storage of test samples. Original standard BS 5072-4-1980 (1999) ISO 3428-1976 in PDF full version. Additional info + preview on request

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Methods of test for Sodium fluoride for industrial use - Part 5- Determination of iron content. Original standard BS 5072-5-1980 (1999) ISO 3429-1976 in PDF full version. Additional info + preview on request

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Methods of Test for sodium fluoride for industrial use - Part 6- Determination of silica content. Original standard BS 5072-6-1980 (1999) ISO 3430-1976 in PDF full version. Additional info + preview on request

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Methods of Test for sodium fluoride for industrial use - Part 7- Determination of soluble sulphates content. Original standard BS 5072-7-1980 (1999) ISO 3431-1976 in PDF full version. Additional info + preview on request

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