JIS G3472 ERW Tube Specification:
Grade: STAM 290GB, STAM 390G, STAM 440G, STAM 470G
OD: 15.9-101.6mm
WT: 1.0-6.0mm
Length: 3000 - 9000mm
JIS G3472 ERW automobile structure steel tube Chemical Composition Table:
|
Grade |
Chemical Composition % |
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|
C |
Si |
Mn |
P |
S | |
|
STAM 290GA |
0.12 max. |
0.35 max. |
0.60 max. |
0.035 max. |
0.035 max. |
|
STAM 290GB |
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|
STAM 340G |
0.20 max. |
0.35 max. |
0.60 max. |
0.035 max. |
0.035 max. |
|
STAM 390G |
0.25 max. |
0.35 max. |
0.30~0.90 |
0.035 max. |
0.035 max. |
|
STAM 440G |
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|
STAM 440H |
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|
STAM 470G |
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|
STAM 470H |
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|
STAM 500G |
0.30 max. |
0.35 max. |
0.30~1.00 |
0.035 max. |
0.035 max. |
|
STAM 500H |
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|
STAM 540H |
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JIS G3472 ERW automobile structure steel tube Mechanical Properties Table:
|
Grade |
Designation |
Tensile strength (MPa) |
Yield Strength |
Elongation (1)% |
Flaring test (2) |
| No.11 Test piece No.12 Test piece |
Size of the flared bell portion (D: OD) |
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| Longitudinal direction | |||||
|
Grade G |
STAM 290GA |
290 min. |
175 min. |
40 min. |
1.25 D |
|
STAM 290GB |
290 min. | 175 min. | 35 min. | 1.20 D | |
|
STAM 340G |
340 min. |
195 min. |
35 min. |
1.20 D | |
|
STAM 390G |
390 min. |
235 min. |
30 min. |
1.20 D | |
|
STAM 440G |
440 min. |
305 min. |
25 min. |
1.15 D | |
|
STAM 470G |
470 min. | 325 min. | 22 min. | 1.15 D | |
|
STAM 500G |
500 min. |
355 min. |
18 min. |
1.15 D | |
| Grade H |
STAM 440H |
440 min. |
355 min. |
20 min. |
1.15 D |
|
STAM 470H |
470 min. |
410 min. |
18 min. |
1.10 D | |
|
STAM 500H |
500 min. | 430 min. | 16 min. | 1.10 D | |
|
STAM 540H |
540 min. |
480 min. |
13 min. |
1.05 D |
