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STANDARDS
The materials and products used in building design and construction are almost universally designated by reference to an appropriate ASTM specification. This simplifies the design and construction process because you can define all the characteristics of a specified product. However, with dozens of ASTM specifications applicable in steel building construction alone, it can be a challenge to keep the standard designations used in contract documents correct. ASTM's steel standards are instrumental in classifying, evaluating, and specifying the material, chemical, mechanical, and metallurgical properties of the different types of steels, which are primarily used in the production of mechanical components, industrial parts, and construction elements, as well as other accessories related to them. The steels can be of the carbon, structural, stainless, ferritic, austenitic, and alloy types. These steel standards are helpful in guiding metallurgical laboratories and refineries, product manufacturers, and other end-users of steel and its variants in their proper processing and application procedures to ensure quality towards safe use. ASTM and other standards which are strictly followed at BSI are provided below:
Codes of Standards Followed By BSI:
► BDS/ISO 6935-2:2006.
► ASTM A 615/A 615M – 03A.
► BS 4449: 97 GR 250 / 460 A / 460 B.
► DIN 488 : 1986 BSt 420 S / BSt 500 S
BDS Standards for Mechanical properties:
MINIMUM STANDARD REQUIREMENT |
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(BDS/ISO 6935-2:2006) |
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Grade |
Yield Strength |
Ultimate Tensile Strength |
Elongation |
Mpa |
Mpa |
% |
|
300 |
300 |
330 |
16 |
400/400W |
400 |
440 |
14 |
500/500W |
500 |
550 |
14 |
BDS standards for Bend and Re-bend test
Nominal Dia of the bar |
8 |
10 |
12 |
16 |
20 |
25 |
32 |
Mandrel dia for bend test |
20 |
25 |
40 |
63 |
80 |
125 |
160 |
Mandrel dia for re-bend test |
40 |
50 |
63 |
100 |
160 |
200 |
320 |
BDS standards for Dimensions, masses and tolerances
Nominal bar Dia (mm) |
Nominal cross-sectional area (mm2) |
Mass per length |
|
Requirement (kg/m) |
Permissible deviation (%) |
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8 |
50.3 |
0.395 |
±8 |
10 |
78.3 |
0.617 |
±5 |
12 |
113 |
0.888 |
±5 |
16 |
201 |
1.58 |
±5 |
20 |
314 |
2.47 |
±5 |
25 |
491 |
3.85 |
±4 |
32 |
804 |
6.31 |
±4 |
ASTM STANDARD
BRITISH STANDARD (BS)
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GERMAN STANDARD (DIN)
DIN 488 : 1986 BSt 420 S / BSt 500 S |
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Rated |
Weight |
Nominal Cross Section Area |
EN to the Ribs (mm) |
EN to the Ribs (mm) |
BST 420 S |
BST 500 S |
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Kg / m. |
Tolerans % |
Height |
Width |
Height |
Width |
Pitch (mm.) |
HATVE |
|
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1.Face |
2.Face |
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mm. |
mm2 |
min. |
max. |
min. |
max. |
min. |
max. |
min. |
max. |
min. |
max. |
min. |
max. |
min. |
max. |
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6 |
0.222 |
± 4 |
28.3 |
0.39 |
0.6 |
0.48 |
0.72 |
0.3 |
0.6 |
0.48 |
0.72 |
4.93 |
6.67 |
3.57 |
4.83 |
4.25 |
5.75 |
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8 |
0.395 |
50.3 |
0.52 |
0.8 |
0.64 |
0.96 |
0.4 |
0.8 |
0.64 |
0.96 |
5.61 |
7.59 |
4.08 |
5.52 |
4.76 |
6.44 |
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10 |
0.617 |
78.5 |
0.65 |
1.0 |
0.8 |
1.2 |
0.5 |
1.0 |
0.8 |
1.2 |
6.37 |
8.62 |
4.67 |
6.32 |
5.52 |
7.47 |
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12 |
0.888 |
113 |
0.78 |
1.2 |
0.96 |
1.44 |
0.6 |
1.2 |
0.96 |
1.44 |
7.05 |
9.54 |
5.18 |
7.01 |
6.12 |
8.28 |
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14 |
1.21 |
154 |
0.91 |
1.4 |
1.12 |
1.68 |
0.7 |
1.4 |
1.12 |
1.68 |
8.24 |
11.15 |
6.03 |
8.16 |
7.14 |
9.66 |
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16 |
1.58 |
201 |
1.04 |
1.6 |
1.28 |
1.92 |
0.8 |
1.6 |
1.28 |
1.92 |
9.35 |
12.65 |
6.97 |
9.43 |
8.16 |
11.04 |
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20 |
2.47 |
314 |
1.3 |
2.0 |
1.60 |
2.4 |
1.0 |
2.0 |
1.60 |
2.4 |
11.73 |
15.87 |
8.67 |
11.73 |
10.2 |
13.8 |
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25 |
3.85 |
491 |
1.63 |
2.5 |
2.0 |
3.0 |
1.25 |
2.5 |
2.0 |
3.0 |
14.70 |
19.89 |
10.79 |
14.60 |
12.75 |
17.25 |
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28 |
4.83 |
616 |
1.82 |
2.8 |
2.24 |
3.36 |
1.40 |
2.8 |
2.24 |
3.36 |
16.40 |
22.19 |
12.15 |
16.44 |
14.28 |
19.32 |
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MECHANICAL PROPERTIES TEST |
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Quality |
Akma N / mm 2 min |
Drawing N / mm2 |
Elongation % |
BSt 420 S |
420 |
500 ( min. Akma x 1.05 ) |
10 |
BSt 500 S |
500 |
550 ( min. Akma x 1.05 ) |
10 |