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Homepage>BS Standards>49 AIRCRAFT AND SPACE VEHICLE ENGINEERING>49.025 Materials for aerospace construction>49.025.10 Steels>BS 5S 99:1994+A1:2015 Specification for 2.5% nickel-chromium-molybdenum (high carbon) steel billets, bars, forgings and parts (1230-1420 MPa: limiting ruling section 150 mm)
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BS 5S 99:1994+A1:2015 Specification for 2.5% nickel-chromium-molybdenum (high carbon) steel billets, bars, forgings and parts (1230-1420 MPa: limiting ruling section 150 mm)

BS 5S 99:1994+A1:2015

Specification for 2.5% nickel-chromium-molybdenum (high carbon) steel billets, bars, forgings and parts (1230-1420 MPa: limiting ruling section 150 mm)

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Standard number:BS 5S 99:1994+A1:2015
Pages:10
Released:2015-04-30
ISBN:978 0 580 87815 2
Status:Standard
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BS 5S 99:1994+A1:2015


This standard BS 5S 99:1994+A1:2015 Specification for 2.5% nickel-chromium-molybdenum (high carbon) steel billets, bars, forgings and parts (1230-1420 MPa: limiting ruling section 150 mm) is classified in these ICS categories:
  • 49.025.10 Steels

This standard specifies characteristics of a nickel-chromium-molybdenum steel supplied in the following forms, and as parts, for general aerospace use:

  1. forging stock, designation S99A;

  2. forgings: softened, designation S99C;

  3. forgings: hardened and tempered, designation S99F;

  4. black bars for machining: softened, designation S99B;

  5. black bars for machining: hardened and tempered, designation S99E;

  6. bright bars for machining: softened, designation S99D;

  7. bright bars for machining: hardened and tempered, designation S99G.