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  BS3100 1991 Cast Steel Chemical Composition

The following standard is the part 1 of the BS3100 1991. Including Grade A1, A2, A3, A4, A5, A6, AL1, AL2, AL3, BL2, AM1, AM2, AW1, AW2, AW3. It is the chemical composition limits for the cast analysis of carbon, carbon manganese and low alloy steel castings. This is a British standard. Our foundry can produce all materials in this standard.

Table 1. Chimical composition limits for the cast analysis of carbon, carbon manganese and low alloy steel castings
steel C Si Mn P S Cr Mo Ni Cu Nb Sn V Total residuals max
  %(m/m) %(m/m) %(m/m) %(m/m) %(m/m) %(m/m) %(m/m) %(m/m) %(m/m) %(m/m) %(m/m) %(m/m) %(m/m)
Carbon and carbon - manganese steels
A1 0.25 0.60 0.90 0.050 0.060 0.30 0.15 0.40 0.80 - - - 0.80
A2 0.35 0.60 1.0 0.050 0.060 - - - - - - - -
A3 0.45 0.60 1.0 0.050 0.060 - - - - - - - -
A4 0.18 to 0.25 0.60 1.2 to 1.6 0.050 0.060 - - - - - - - -
A5 0.25 to 0.33 0.60 1.2 to 1.6 0.050 0.060 - - - - - - - -
A6 0.25 to 0.33 0.60 1.2 to 1.6 0.050 0.060 - - - - - - - -
For use at low temperatures
AL1 0.20 0.60 1.1 0.040 0.040 0.30 0.15 0.40 0.30 - - - 0.80
AL2 0.25 0.60 1.2 0.040 0.040 0.30 0.15 0.40 0.30 - - - 0.80
AL3 0.25 0.60 1.2 0.040 0.040 0.30 0.15 0.40 0.30 - - - 0.80
BL2 0.12 0.60 0.80 0.030 0.030 - - 3.0 to 4.0 - - - - -
High magnetic permeability
AM1 0.15 0.60 0.50 0.050 0.050 0.30 0.15 0.4 0.30 - - - 0.80
AM2 0.25 0.60 0.50 0.050 0.050 0.30 0.15 0.40 0.30 - - - 0.80
For case hardening
AW1 0.10 to0.18 0.60 0.60 to 1.0 0.050 0.050 0.30 0.15 0.40 0.30 - - - 0.80
Resistance to wear and for surface hardening
AW2 0.40 to0.50 0.60 1.0 0.050 0.050 0.30 0.15 0.40 0.30 - - - 0.80
AW3 0.50 to 0.60 0.60 1.0 0.050 0.050 0.30 0.15 0.40 0.30 - - -0.80  

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British Standards