Mechanical Hollow Section Rubber Bush Round Tubing
Inner plum blossom or hexagonl shapped steel tubes for auto rubber bushing as JIS G3445
STKM12B,STKM12C,STKM11A
Seamless Carbon and Alloy Steel Mechanical Tubing
Applications: For auto rubber bushing
Size range: O.D.:6-76mm W.T.:1-15mm L:max12000mm
Steel Grade JIS G3445 STKM11A,12C,13C or others,Chemical compisition:
Mechanical properties:
| JIS3445 | C | Si | Mn | P | S | Nb or V | Tention Test | Flateniug | Bendability | ||||
| Symbol | T.S. N/mm^2 |
Y.P. N/mm^2 |
Elongation | ||||||||||
| No 4,11,12 Test pe |
No 4,5 Test pe |
Distance Between Flatened Plates |
Band Angle |
Inside Radius |
|||||||||
| STKM11A | 0.12 max. | 0.35 max. | 0.60 max. | 0.040 max. | 0.040 max. | . | 290 min. | . | 35 min. | 30 min. | 1/2D | 180 | 4 D |
| STKM12A | 0.20 max. | 0.35 max. | 0.60 max. | 0.040 max. | 0.040 max. | . | 340 min. | 175 min. | 35 min. | 30 min. | 2/3D | 90 | 6 D |
| STKM12B | 390 min. | 275 min. | 25 min. | 20 min. | 2/3D | 90 | 6 D | ||||||
| STKM12C | 470 min. | 355 min. | 20 min. | 15 min. | . | . | . | ||||||
| STKM13A | 0.25 max. | 0.35max. | 0.30 to 1.00 | 0.040 max. | 0.040 max. | . | 370 min. | 215 min. | 30 min. | 25 min. | 2/3D | 90 | 6 D |
| STKM13B | 440 min. | 305 min. | 20 min. | 15 min. | 3/4D | 90 | 6 D | ||||||
| STKM13C | 510 min. | 380 min. | 15 min. | 10 min. | . | . | . | ||||||
| STKM14A | 0.30 max. | 0.35 max. | 0.30 to 1.00 | 0.040 max. | 0.040 max. | . | 410 min. | 245 min. | 25 min. | 20 min. | 3/4D | 90 | 6 D |
| STKM14B | 500 min. | 355 min. | 15 min. | 10 min. | 7/8D | 90 | 8 D | ||||||
| STKM14C | 550 min. | 410 min. | 15 min. | 10 min. | . | . | . | ||||||
| STKM15A | 0.25 to 0.35 | 0.35 max. | 0.30 to 1.00 | 0.040 max. | 0.040 max. | . | 470 min. | 275 min. | 22 min. | 17 min. | 3/4D | 90 | 6 D |
| STKM15C | 580 min. | 430 min. | 12 min. | 17 min. | . | . | . | ||||||
| STKM16A | 0.35 to 0.45 | 0.40 max. | 0.40 to 1.00 | 0.040 max. | 0.040 max. | . | 510 min. | 325 min. | 20 min. | 15 min. | 7/8D | 90 | 8 D |
| STKM16C | 620 min. | 460 min. | 12 min. | 7 min. | . | . | . | ||||||
| STKM17A | 0.45 to 0.55 | 0.40 max. | 0.40 to 1.00 | 0.040 max. | 0.040 max. | . | 550 min. | 345 min. | 20 min. | 15 min. | 7/8D | 90 | 8 D |
| STKM17C | 650 min. | 480 min. | 10 min. | 5 min. | . | . | . | ||||||
| STKM18A | 0.18 max. | 0.55 max. | 1.50 max. | 0.040 max. | 0.040 max. | . | 440 min. | 275 min. | 25 min. | 20 min. | 7/8D | 90 | 6 D |
| STKM18B | 490 min. | 315 min. | 23 min. | 18 min. | 7/8D | 90 | 8 D | ||||||
| STKM18C | 510 min. | 380 min. | 15 min. | 10 min. | . | . | . | ||||||
| STKM19A | 0.25 max. | 0.55 max. | 1.50 max. | 0.040 max. | 0.040 max. | . | 490 min. | 315 min. | 23 min. | 18 min. | 7/8D | 90 | 6 D |
| STKM19C | 550 min. | 410 min. | 15 min. | 10 min. | . | . | . | ||||||
| /D | 0.25 max. | 0.55 max. | 1.60 max. | 0.040 max. | 0.040 max. | 0.15 max. | 540 min. | 390 min. | 23 min. | 18 min. | 7/8D | 90 | 6 D |
1. Thickness variation can’t lead the wall out the limit deviations concerning wall thickness.
2. In pipe cross-section the deviation from right angle can’t be more than ±1.5°.
3. Pipe curvature can’t be more than 2 mm for 1m of length.
Pipes are produced without adjustment, in this case curvature is not regulated.
1)About our factory:
2) Production equipments:
3) Testing equipments:
4) Export packing methods:
5)We have ISO9001/TS16949 certificates:
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