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JIS G3472 STAM290GA STAM340G Carbon Steel Welded Tube for Automobile
Outside diameter: 15.0mm up to and including127.0mm
Wall thickness: 1.0mm up to and including 7.0mm
Application: Automobile structural purposes
Grade: JIS G3472 STAM290GA, STAM 290GB, STAM 340G, STAM 390G, STAM 440G,
STAM 470G, STAM 500G, STAM 440H, STAM 470H, STAM 500H, STAM 540H
JIS G3472 ERW automobile structure steel tube Chemical Composition Table:
| Steel Grade | Chemical Composition % | ||||
| C | Si | Mn | P | S | |
| STAM 290GA | 0.12 max. | 0.35 max. | 0.60 max. | 0.035 max. | 0.035 max. |
| STAM 290GB | |||||
| 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 | 0.25 max. | 0.35 max. | 0.30~0.90 | 0.035 max. | 0.035 max. |
| STAM 440H | |||||
| STAM 470G | 0.25 max. | 0.35 max. | 0.30~0.90 | 0.035 max. | 0.035 max. |
| STAM 470H | |||||
| STAM 500G | 0.30 max. | 0.35 max. | 0.30~1.00 | 0.035 max. | 0.035 max. |
| STAM 500H | |||||
| STAM 540H | 0.30 max. | 0.35 max. | 0.30~1.00 | 0.035 max. | 0.035 max. |
JIS G3472 ERW automobile structure steel tube Mechanical Properties Table:
| Grade | Designation | Tensile strength kgf/? | Yield Strength kgf/? | Elongation (1)% No.1 test piece No.2 Test piece | Flaring test (2) |
| Size of flared bell portion (D: outside diameter of tube) | |||||
| {N/?} | {N/?} | Longitudinal direction | |||
| Grade G | STAM 290GA | 30 min. | 18 min. | 40 min. | 1.25 D |
| {294} min. | {177} min. | ||||
| STAM 290GB | 30 min. | 18 min. | 35 min. | 1.20 D | |
| {294} min. | {177} min. | ||||
| STAM 340G | 35 min. | 20 min. | 35 min. | 1.20 D | |
| {343} min. | {196} min. | ||||
| STAM 390G | 40 min. | 24 min. | 30 min. | 1.20 D | |
| {392} min. | {235} min. | ||||
| STAM 440G | 45 min. | 31 min. | 25 min. | 1.15 D | |
| {441} min. | {304} min. | ||||
| STAM 470G | 48 min. | 33 min. | 22 min. | 1.15 D | |
| {471} min. | {324} min. | ||||
| STAM 500G | 51 min. | 36 min. | 18 min. | 1.15 D | |
| {500} min. | {353} min. | ||||
| Grade H | STAM 440H | 45 min. | 36 min. | 20 min. | 1.15 D |
| {441} min. | {353} min. | ||||
| STAM 470H | 48 min. | 42 min. | 18 min. | 1.10 D | |
| {471} min. | {412} min. | ||||
| STAM 500H | 51 min. | 44 min. | 16 min. | 1.10 D | |
| {500} min. | {431} min. | ||||
| STAM 540H | 55 min. | 49 min. | 13 min. | 1.05 D | |
| {539} min. | {481} min. |
JIS G3472 steel tube Dimension Table:
| Specified outside dia. | Specified wall thickness (mm) | ||||||||||||||
| (mm) | 1 | 1.2 | 1.6 | 2 | 2.3 | 2.6 | 2.8 | 2.9 | 3.2 | 3.4 | 3.5 | 4 | 4.5 | 5 | 6 |
| 15.9 | - | 0.435 | 0.564 | 0.686 | - | - | - | - | - | - | - | - | - | - | - |
| 17.3 | - | - | - | 0.755 | 0.851 | - | - | - | - | - | - | - | - | - | - |
| 19.1 | 0.446 | 0.53 | 0.69 | 0.843 | 0.953 | - | - | - | - | - | - | - | - | - | - |
| 22.2 | 0.523 | 0.621 | 0.813 | 0.996 | 1.13 | - | - | - | - | - | - | - | - | - | - |
| 25.4 | - | 0.716 | 0.939 | 1.15 | - | 1.5 | - | 1.61 | - | - | - | - | - | - | - |
| 28.6 | - | 0.811 | 1.07 | 1.31 | - | 1.67 | - | - | - | - | - | - | - | - | - |
| 31.8 | 0.76 | 0.906 | 1.19 | 1.47 | 1.67 | - | - | - | 2.26 | - | - | - | - | - | - |
| 34 | - | - | 1.28 | - | 1.8 | - | - | - | 2.43 | - | - | 2.97 | - | - | - |
| 35 | - | 1 | 1.32 | 1.63 | - | - | 2.22 | 2.32 | - | - | - | - | - | - | - |
| 38.1 | 0.915 | 1.09 | 1.44 | 1.78 | 2.03 | - | - | - | - | - | - | - | - | - | - |
| 42.7 | - | 1.23 | 1.62 | 2.01 | 2.29 | 2.57 | - | - | 3.12 | - | 3.38 | - | - | 4.65 | - |
| 45 | 1.08 | 1.3 | 1.71 | 2.12 | 2.42 | 2.71 | - | 3.01 | 3.3 | - | - | - | 4.49 | 4.93 | 5.77 |
| 47.6 | - | 1.37 | 1.81 | - | 2.57 | - | - | 3.2 | - | - | - | - | - | - | - |
| 48.6 | - | 1.4 | 1.85 | 2.3 | 2.63 | - | - | 3.27 | 3.58 | - | - | - | 4.89 | 5.38 | 6.3 |
| 50.8 | - | 1.47 | 1.94 | 2.41 | 2.75 | 3.08 | 3.31 | 3.43 | - | 3.97 | 4.08 | 4.63 | - | - | 6.63 |
| 54 | - | 1.56 | 2.07 | - | 2.93 | 3.29 | 3.54 | 3.65 | - | 4.24 | 4.36 | 4.95 | - | - | - |
| 57 | - | - | 2.19 | - | 3.1 | 3.48 | 3.74 | 3.87 | 4.25 | 4.49 | 4.62 | - | - | - | - |
| 60.5 | - | - | 2.32 | - | 3.3 | 3.71 | - | 4.12 | 4.52 | - | - | 5.59 | - | - | - |
| 63.5 | - | - | 2.44 | - | - | 3.9 | - | - | - | - | - | - | - | - | - |
| 65 | - | - | 2.5 | - | - | - | - | - | 4.88 | - | 5.31 | - | - | - | - |
| 68.9 | - | - | 2.66 | - | 3.78 | - | - | - | - | - | - | - | - | - | - |
| 70 | - | - | 2.7 | - | - | - | - | - | 5.27 | - | 5.74 | - | - | - | - |
| 75 | - | - | 2.9 | - | 4.12 | 4.63 | - | 5.16 | 5.67 | - | |||||
