General structural steel and welding structural steel
|
Category |
Symbol |
Product Thickness mm |
% Chemical Composition |
Yield Point Mpa |
Tensile Strength Mpa |
% Elongation |
180o b> 35mm Bending Diameter |
V-notch Impact Test |
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|
c < |
Si < |
Mn |
P< |
S < |
Others |
L0 =50mm b0 = 25mm |
L0 =200mm b0 = 40mm |
|
Impact Energy J > |
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|
Thickness |
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|
<5 |
>5 |
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|
General Structural steel |
SS330 |
< 12.7 |
0.15 |
0.30 |
<0.95 |
0.035 |
0.04 |
Alt > 0.010 |
205 |
300~430 |
>26 |
>21 |
1a |
- |
- |
|
SS400 |
<16.0 |
0.21 |
0.30 |
<1.30 |
- |
245 |
400~510 |
>21 |
>17 |
3a |
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|
SS490 |
1.6~12.5 |
0.22 |
0.25 |
<1.40 |
285 |
490~610 |
>19 |
>15 |
4a |
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|
SS540 |
2.3 ~6.0 |
0.30 |
0.25 |
<1.60 |
Other alloy elements may be added if necessary |
400 |
>540 |
>16 |
>13 |
4a |
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|
Welding Structural steel
|
SM400A |
1.6~16.0 |
0.23 |
0.35 |
>2.5xC |
0.035 |
0.04 |
245 |
400~510 |
>23 |
>18 |
2a |
- |
- |
|
|
SM400B |
1.6~12.0 |
0.20 |
0.60~1.40 |
0 |
27 |
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|
SM400C |
2.3~12.0 |
0.18 |
< 1.40 |
0 |
47 |
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|
SM490A |
1.6~16.0 |
0.20 |
0.55 |
<1.60 |
0.035 |
0.04 |
- |
- |
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|
SM490B |
1.6~12.0 |
0.18 |
325 |
490~610 |
>22 |
>17 |
3a |
0 |
27 |
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|
SM490C |
2.0~5.0 |
0 |
47 |
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|
SM490YA |
3.0~12.7 |
0.20 |
365 |
490~610 |
>19 |
>15 |
3a |
- |
- |
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|
SM490YB |
2.0~12.7 |
0 |
27 |
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|
SM520B |
1.5~12.0 |
0.20 |
365 |
520~635 |
>19 |
>15 |
3a |
0 |
27 |
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|
SM520C |
1.6~6.0 |
0 |
47 |
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|
Welten590RE |
1.6~12.0 |
0.12 |
0.15 ~0.55 |
<2.00 |
0.030 |
0.030 |
Ti < 0.15 |
450 |
590~705 |
>20 |
2a |
-5 |
47 |
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JIS 3132 Symbols of Grades
|
SPHT 1 |
1.2 or over up to and incl.13 |
|
SPHT 2 |
|
|
SPHT 3 |
1.6 or over up to and incl.13 |
|
SPHT 4 |
Chemical Composition
|
Grade symbol |
C |
Si |
Mn |
P |
S |
|
SPHT 1 |
0.10 max |
0.35 max |
0.50 max |
0.040 max |
0.040 max |
|
SPHT 2 |
0.18 max |
0.35 |
0.60 max |
0.040 max |
0.040 max |
|
SPHT 3 |
0.25 max |
0.35 |
0.30 to 0.90 |
0.040 max |
0.040 max |
|
SPHT 4 |
0.30 max |
0.35 |
0.30 to 1.00 |
0.040 max |
0.040 max |
Note : The maximum silicon content may be modified to 0.04 % max. by agreement between the purchaser and the supplier.
Mechanical Properties (Applicable on and after Jan 1, 1991)
|
Grade Symbol |
Tensile Strength N/mm2 |
Elongation % |
Tensile test piece |
Bendability
|
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|
1.2 mm or over to and excl. 1.6 mm in thickness |
1.6 mm or over to and excl. 3.0 mm in thickness |
3.0 mm or over to and excl. 6.0 mm in thickness |
6.0 mm or over to and excl. 13 mm in thickness |
Bending angle (Degree) |
Inside radius |
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|
3.0 mm or under in thickness |
Over 3.0 mm up to and incl. 13 mm in thickness |
Test Piece |
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|
SPHT1 |
270 min |
30 min |
32 min |
35 min |
37 min |
N0. 5 taken in rolling direction |
180 |
Flat on itself |
Thickness x 0.5 |
No. 5 taken in rolling direction |
|
SPHT2 |
340 min |
25 min |
27 min |
30 min |
32 min |
180 |
Thickness x 1.0 |
Thickness x 1.5 |
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|
SPHT3 |
410 min |
20 min |
22 min |
25 min |
27 min |
180 |
Thickness x 1.5 |
Thickness x 2.0 |
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|
SPHT4 |
490 min |
15 min |
18 min |
20 min |
27 min |
180 |
Thickness x 1.5 |
Thickness x 2.0 |
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