GOST 

Aluminum sheet GOST 21631-76: medium strength alloys

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Below are the GOST requirements 21631-76 mechanical properties of the aluminum sheets of aluminum alloys sredneprochnyh AMg2, AMg3, AB, D12.

D12 aluminum alloy sheets

Annealed:

sheet thickness - from 0,5 to 4,0 mm:

  • tensile strength - at least 155 MPa;
  • yield stress 0,2 - not controlled;
  • elongation δ10 - not less than 14,0 %.

Semi-ready:

sheet thickness - from 0,5 to 4,0 mm:

  • tensile strength - at least 220 MPa;
  • yield stress 0,2 - not controlled;
  • Elongation - at least 3,0 %.

Sheets from aluminum alloy AMg2

Annealed:

1) sheet thickness - from 0,5 to 1,0 mm:

  • tensile strength - at least 165 MPa;
  • yield stress 0,2 - not controlled;
  • elongation δ10 - not less than 16,0 %.

2) sheet thickness - over 1,0 to 10,5 mm:

  • tensile strength - at least 165 MPa;
  • yield stress 0,2 - not less than 100 MPa;
  • elongation δ10 - not less than 18,0 %.

Semi-ready:

1) sheet thickness - from 0,5 to 1,0 mm:

  • time resistance - by 235 to 314 MPa;
  • yield stress 0,2 - not less than 145 MPa;
  • Elongation - at least 5,0 %.

2) sheet thickness - from 1,0 to 4,0 mm:

  • time resistance - by 235 to 314 MPa;
  • yield stress 0,2 - not less than 145 MPa;
  • Elongation - at least 6,0 %.

Cold-worked:

1) sheet thickness - from 0,5 to 1,0 mm:

  • tensile strength - at least 265 MPa;
  • yield stress 0,2 - not less than 215 MPa;
  • Elongation - at least 3,0 %.

2) sheet thickness - from 1,0 to 4,0 mm:

  • time resistance - by 235 to 314 MPa;
  • yield stress 0,2 - not less than 145 MPa;
  • Elongation - at least 4,0 %.

Without heat treatment:

sheet thickness - from 5,0 to 10,5 mm:

  • tensile strength - at least 175 MPa;
  • yield stress 0,2 - not controlled;
  • Elongation - at least 7,0 %.

Sheets from aluminum alloy AMg3

Annealed:

1) sheet thickness - from 0,5 to 0,6 mm:

  • tensile strength - at least 195 MPa;
  • yield stress 0,2 - not less than 90 MPa;
  • elongation δ10 - not less than 15,0 %.

2) sheet thickness - over 0,6 to 4,5 mm:

  • tensile strength - at least 195 MPa;
  • yield stress 0,2 - not less than 100 MPa;
  • elongation δ10 - not less than 15,0 %.

3) sheet thickness - over 4,5 to 10,5 mm:

  • tensile strength - at least 185 MPa;
  • yield stress 0,2 - not less than 180 MPa;
  • elongation δ10 - not less than 15,0 %.

3.2 Sheet material condition - semi-standardized:

sheet thickness - from 0,5 to 4,0 mm:

  • tensile strength - at least 245 MPa;
  • yield stress 0,2 - not less than 195 MPa;
  • Elongation - at least 7,0 %.

Without heat treatment:

1) sheet thickness - from 5,0 to 6,0 mm:

  • tensile strength - at least 185 MPa;
  • yield stress 0,2 - not less than 80 MPa;
  • Elongation - at least 12,0 %.

2) sheet thickness - over 6,0 to 10,5 mm:

  • tensile strength - at least 185 MPa;
  • yield stress 0,2 - not less than 80 MPa;
  • Elongation - at least 15,0 %.

Sheets from aluminum alloy AB

Annealed:

1) sheet thickness - from 0,5 to 5,0 mm:

  • tensile strength - at least 145 MPa;
  • yield stress 0,2 - not controlled;
  • elongation δ10 - not less than 20,0 %.

2) sheet thickness - over 5,0 to 10,5 mm:

  • tensile strength - at least 145 MPa;
  • yield stress 0,2 - not controlled;
  • elongation δ10 - not less than 15,0 %.

Hardened and naturally aged:

1) sheet thickness - from 0,5 to 0,6 mm:

  • tensile strength - at least 195 MPa;
  • yield stress 0,2 - not controlled;
  • Elongation - at least 18,0 %.

2) sheet thickness - from 0,6 to 3,0 mm:

  • tensile strength - at least 195 MPa;
  • yield stress 0,2 - not controlled;
  • Elongation - at least 20,0 %.

3) sheet thickness - from 3,0 to 5,0 mm:

  • tensile strength - at least 195 MPa;
  • yield stress 0,2 - not controlled;
  • Elongation - at least 18,0 %.

4) sheet thickness - from 5,0 to 10,5 mm:

  • tensile strength - at least 175 MPa;
  • yield stress 0,2 - not controlled;

Elongation - at least 16,0 %.

Hardened and artificially aged:

1) sheet thickness - from 0,5 to 5,0 mm:

  • tensile strength - at least 295 MPa;
  • yield stress 0,2 - not controlled;
  • Elongation - at least 10,0 %.

2) sheet thickness - over 5,0 to 10,5 mm:

  • tensile strength - at least 295 MPa;
  • yield stress 0,2 - not controlled;
  • Elongation - at least 8,0 %.

Without heat treatment:

sheet thickness - from 5,0 to 10,5 mm:

  • tensile strength - at least 175 MPa;
  • yield stress 0,2 - not controlled;
  • Elongation - at least 14,0 %.

Hardened and artificially aged:

sheet thickness - over 5,0 to 10,5 mm:

  • tensile strength - at least 295 MPa;
  • yield stress 0,2 - not controlled;
  • Elongation - at least 7,0 %.