Pipe for automotive is also one of ISTW fine products with SNI 07-0068-1987 certification. These pipes for automotive are characterized with certain specifications
Why Choose Our Steel?
Proven Performance:
Our steel is used in a wide range of demanding applications, from high-rise buildings and bridges to precision machinery and automotive components.
Innovative Technology:
Leveraging advanced manufacturing techniques, we produce steel that sets the industry standard for quality and performance.
Commitment to Excellence:
Our dedicated team ensures that every batch of steel meets rigorous standards and is delivered with exceptional service and support.
| Certification | Category | Description |
|---|---|---|
| SNI | 0039 : 2013 | WATERWORKS STEEL PIPE WITH/WITHOUT ZINC COATING (GALVANIZED PIPE) |
| SNI | 0068 : 2013 | GENERAL CONSTRUCTION STEEL PIPES (CONSTRUCTION PIPE) |
| BS | 1387 : 1985 | BLACK AND HOT DIPPED GALVANIZED STEEL PIPE |
| ASTM | A 53 | SPECIFICATION FOR PIPE, STEEL, BLACK AND HOT DIPPED, ZINC COATED, WEEDED AND SEAMLEES |
| JIS | G 3334 | CARBON STEEL TUBES FOR GENERAL STRUCTURAL PURPOSE (STK) |
| JIS | G 3445 | CARBON STEEL TUBES FOR MACHINE STRUCTURAL PURPOSE (STKM) |
| JIS | G 3445 | CARBON STEEL TUBES FOR MACHINE STRUCTURAL PURPOSE (STKM) |
| JIS | G 3466 | CARBON STEEL SQUARE AND RECTANGULAR TUBE FOR GENERAL STRUCTURAL PURPOSE (STKR) |
| JIS | G 3452 | CARBON STEEL PIPES FOR ORDINARY PIPING (SGP) |
| JIS | G 3454 | SPECIFICATION FOR PIPE, STEEL, BLACK AND HOT DIPPED, ZINC COATED, WEEDED AND SEAMLEES |
| JIS | G 3472 | CARBON STEEL TUBES FOR AUTOMOBILE (STAM) |
| JIS | G 3442 | GALVANIZED STEEL PIPES FOR ORDINARY PIPING (SGPW) |
Mechanical Capabilities:
Superior Strength and Durability:
Our steel boasts exceptional tensile strength and impact resistance, ensuring your structures and components can withstand extreme conditions and heavy loads.
Enhanced Toughness:
Designed to endure stress and strain, our steel minimizes the risk of fractures and deformation, even under high-impact scenarios.
Precision Engineering:
With tight tolerances and consistent properties, our steel supports precise and reliable performance in all applications, from automotive to construction.
Optimized Alloying:
Our steel incorporates a carefully balanced mix of elements like carbon, manganese, chromium, and nickel to enhance its mechanical properties and resistance to corrosion.
Consistent Quality:
Rigorous testing and quality control ensure that our steel maintains its chemical composition, providing you with a dependable material for all your needs.
Tailored Solutions:
We offer customized alloy formulations to meet the specific requirements of your projects, whether you need enhanced hardness, improved weldability, or superior corrosion resistance.
| Grade | Designation | Tensile Strenght (N/MM) | Yield Point or Proof Stress (N/MM) | Elongation (%) | Flattening Strength | Bending Strength | ||
|---|---|---|---|---|---|---|---|---|
| No.4 No.11, No.12 Test Pieces Longitudinal Direction | No.4, No.5, Test Pieces Transverce Direction | Distance Between Flat Plates (H) (D: Outside Diameter of The Tube) | Bend Angle | Inside Radius (D: Outside Diameter Of The Tube) | ||||
| Grade 11 | STKM 11 A | 290 MIN. | - | 35 MIN. | 30 MIN. | 1/2 D | 180° | 4 D |
| Grade 12 | STKM 12 A | 340 MIN. | 175 MIN. | 35 MIN. | 30 MIN. | 2/3 D | 90° | 6 D |
| Grade 12 | STKM 12 B | 390 MIN. | 275 MIN. | 25 MIN. | 20 MIN. | 2/3 D | 90° | 6 D |
| Grade 12 | STKM 12 C | 470 MIN. | 355 MIN. | 20 MIN. | 15 MIN. | - | - | - |
| Grade 13 | STKM 13 A | 370 MIN. | 215 MIN. | 30 MIN. | 25 MIN. | 2/3 D | 90° | 6 D |
| Grade 13 | STKM 13 B | 440 MIN. | 305 MIN. | 20 MIN. | 15 MIN. | 3/4 D | 90° | 6 D |
| Grade 13 | STKM 13 C | 510 MIN. | 380 MIN. | 15 MIN. | 10 MIN. | - | - | - |
| Grade 14 | STKM 14 A | 410 MIN. | 245 MIN. | 25 MIN. | 20 MIN. | 3/4 D | 90° | 6 D |
| Grade 14 | STKM 14 B | 500 MIN. | 355 MIN. | 15 MIN. | 10 MIN. | 7/8 D | 90° | 8 D |
| Grade 14 | STKM 14 C | 550 MIN. | 410 MIN. | 15 MIN. | 10 MIN. | - | - | - |
| Grade 15 | STKM 15 A | 470 MIN. | 275 MIN. | 22 MIN. | 17 MIN. | 3/4 D | 90° | 6 D |
| Grade 15 | STKM 15 C | 580 MIN. | 430 MIN. | 12 MIN. | 7 MIN. | - | - | - |
| Grade 16 | STKM 16 A | 510 MIN. | 325 MIN. | 20 MIN. | 15 MIN. | 7/8 D | 90° | 8 D |
| Grade 16 | STKM 16 C | 620 MIN. | 460 MIN. | 12 MIN. | 7 MIN. | - | - | - |
| Grade 17 | STKM 17 A | 550 MIN. | 345 MIN. | 20 MIN. | 15 MIN. | 7/8 D | 90° | 8 D |
| Grade 17 | STKM 17 C | 650 MIN. | 480 MIN. | 10 MIN. | 5 MIN. | - | - | - |
| Grade 18 | STKM 18 A | 440 MIN. | 276 MIN. | 25 MIN. | 20 MIN. | 7/8 D | 90° | 6 D |
| Grade 18 | STKM 18 B | 490 MIN. | 315 MIN. | 23 MIN. | 18 MIN. | 7/8 D | 90° | 8 D |
| Grade 18 | STKM 18 C | 510 MIN. | 380 MIN. | 15 MIN. | 10 MIN. | - | - | - |
| Grade 19 | STKM 19 A | 490 MIN. | 315 MIN. | 23 MIN. | 18 MIN. | 7/8 D | 90° | 6 D |
| Grade 19 | STKM 19 C | 550 MIN. | 410 MIN. | 15 MIN. | 10 MIN. | - | - | - |
| Grade 20 | STKM 20 A | 540 MIN. | 390 MIN. | 23 MIN. | 18 MIN. | 7/8 D | 90° | 6 D |
| Grade | Designation | Chemical Composition % Max | |||||
|---|---|---|---|---|---|---|---|
| C | Si | Mn | P | S | Nb or V | ||
| Grade 11 | STKM 11 A | 0.12 | 0.35 | 0.60 | 0.040 | 0.040 | - |
| Grade 12 | STKM 12 A | 0.20 | 0.30 | 0.60 | 0.040 | 0.040 | - |
| STKM 12 B | |||||||
| STKM 12 C | |||||||
| Grade 13 | STKM 13 A | 0.25 | 0.35 | 0.30 to 0.90 | 0.040 | 0.040 | - |
| STKM 13 B | |||||||
| STKM 13 C | |||||||
| Grade 14 | STKM 14 A | 0.30 | 0.35 | 0.30 to 1.00 | 0.040 | 0.040 | - |
| STKM 14 B | |||||||
| STKM 14 C | |||||||
| Grade 15 | STKM 15 A | 0.25 to 0.35 | 0.35 | 0.30 to 1.00 | 0.040 | 0.040 | - |
| STKM 15 C | |||||||
| Grade 16 | STKM 16 A | 0.35 to 0.45 | 0.40 | 0.40 to 1.00 | 0.040 | 0.040 | - |
| STKM 16 C | |||||||
| Grade 17 | STKM 17 A | 0.45 to 0.55 | 0.40 | 0.40 to 1.00 | 0.040 | 0.040 | - |
| STKM 17 C | |||||||
| Grade 18 | STKM 18 A | 0.18 | 0.55 | 1.50 | 0.040 | 0.040 | - |
| STKM 18 B | |||||||
| STKM 18 C | |||||||
| Grade 19 | STKM 19 A | 0.25 | 0.55 | 1.50 | 0.040 | 0.040 | - |
| STKM 19 C | |||||||
| Grade 20 | STKM 20 A | 0.25 | 0.55 | 1.60 | 0.040 | 0.040 | 0.15 |
| Division | Tolerance On Outside Diameter | |
|---|---|---|
| No. 1 | < 50 MM | ± 0.55 MM |
| ≥ 50 MM | ± 1% | |
| No. 2 | < 50 MM | ± 0.25 MM |
| ≥ 50 MM | ± 0.5% | |
| No. 3 | < 25 MM | ± 0.12 MM |
| 25 MM ≤ D < 40 MM | ± 0.15 MM | |
| 25 MM ≤ D < 40 MM | ± 0.15 MM | |
| 25 MM ≤ D < 40 MM | ± 0.15 MM | |
| 25 MM ≤ D < 40 MM | ± 0.15 MM | |
| 25 MM ≤ D < 40 MM | ± 0.15 MM | |
| 25 MM ≤ D < 40 MM | ± 0.15 MM | |
| 25 MM ≤ D < 40 MM | ± 0.15 MM | |
| 25 MM ≤ D < 40 MM | ± 0.15 MM | |
| Division | Tolerance On Outside Diameter | |
|---|---|---|
| NO. 1 | < 4 MM | ± 0.6 MM |
| - 0.5 MM | ||
| ≥ 4 MM | + 15 % | |
| - 12.5 % | ||
| NO. 2 | < 3 MM | ± 0.3 MM |
| ≥ 3 MM | ± 10 % | |
| NO. 3 | < 2 MM | ± 0.15 MM |
| ≥ 2 MM | ± 8 % | |
PRODUCT USAGE
Steel tubes have transcended their basic role to become indispensable assets across diverse industries. From revolutionizing the automotive sector to underpinning the installation of gas and water pipelines, and from shaping the very structures of modern buildings to serving countless other vital functions, steel tubes and pipes are now essential cornerstones of innovation and progress.
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