JIS G3445 Carbon Steel Tubes For Machine Structure
JS G3445 steel pipe has good mechanical properties and processing properties, it's used for machinery, automobiles, bicycles, furniture, appliances and othermachine parts.
In the manufacture of heavy machinery equipment, JSG3445 steel pipe is often used as the frame or support structure of the equipment, providing the necessary strength and stiffness.
Specifications
• JIS G3445 tubing come with a comprehensive specification, steel grades from low carbon to alloy steels.
• Procedure: seamless,welded
• Dimensions: O.D.: 10 mm – 120 mm
• Thickness: 1.0mm – 20mm
• Steel Grade: STKM11A, STKM12A,12B,12C,STKM13A,13B,13C,STKM14A
• Surface Coating: Black, Red, Primer, Hot Dip Galvanizing
• End Type: Square cut, Bevelled, Grooved
• Pipe Packing: In bundles, Plastic film full length wrap
Chemical Composition(%)
| Steel Grade | C | Si | Mn | P | S |
| STKM11A | ≤0.12 | ≤0.35 | ≤0.60 | ≤0.040 | ≤0.040 |
| STKM12A | ≤0.20 | ≤0.35 | ≤0.60 | ≤0.040 | ≤0.040 |
| STKM12B | |||||
| STKM12C | |||||
| STKM13A | ≤0.25 | ≤0.35 | 0.30-0.90 | ≤0.040 | ≤0.040 |
| STKM13B | |||||
| STKM13C | |||||
| STKM14A | ≤0.30 | ≤0.35 | 0.30-1.00 | ≤0.040 | ≤0.040 |
| STKM14A | ≤0.30 | ≤0.35 | 0.30-1.00 | ≤0.040 | ≤0.040 |
| STKM14B | |||||
| STKM14C | |||||
| STKM15A | 0.25-0.35 | ≤0.35 | 0.30 - 1.00 | ≤0.040 | ≤0.040 |
| STKM15C | |||||
| STKM16A | 0.35-0.45 | ≤0.40 | 0.40 -1.00 | ≤0.040 | ≤0.040 |
| STKM16C | |||||
| STKM17A | 0.45-0.55 | ≤0.40 | 0.40 -1.00 | ≤0.040 | ≤0.040 |
| STKM17C | |||||
| STKM18A | ≤0.18 | ≤0.55 | ≤1.50 | ≤0.040 | ≤0.040 |
| STKM18B | |||||
| STKM18C | |||||
| STKM19A | ≤0.25 | ≤0.55 | ≤0.15 | ≤0.040 | ≤0.040 |
| STKM19C | |||||
| STKM20A | ≤0.25 | ≤0.55 | ≤1.6 | ≤0.040 | ≤0.040 |
Mechanical Properties
| Steel Grade | （Mpa）Tensile Strength | (Mpa)Yield Strength | （%）Elongation |
| STKM11A | ≥290 | ≥35 | |
| STKM12A ATKM12B STKM12C | ≥340 ≥390 ≥470 | ≥175 ≥275 ≥355 | ≥35 ≥25 ≥20 |
| STKM13A STKM13B STKM13C | ≥370 ≥ 440 ≥510 | ≥ 215 ≥305 ≥380 | ≥30 ≥ 20 ≥15 |
| STKM14A STKM14B STKM14C | ≥410 ≥500 ≥550 | ≥245 ≥355 ≥410 | ≥25 ≥15 ≥15 |
| STKM15A STKM15C | ≥470 ≥580 | ≥275 ≥430 | ≥22 ≥12 |
| STKM16A STKM16C | ≥510 ≥620 | ≥325 ≥460 | ≥20 ≥12 |
| STKM17A STKM17C | ≥550 ≥650 | ≥345 ≥480 | ≥20 ≥10 |
| STKM18A STKM18B STKM18C | ≥440 ≥490 ≥510 | ≥275 ≥315 ≥380 | ≥25 ≥23 ≥15 |
| STKM19A STKM19C | ≥490 ≥550 | ≥315 ≥410 | ≥23 ≥15 |
| STKM20A | ≥540 | ≥390 | ≥23 |
Why Choose Haotan
• More than 15 years experience.
• R&D strength.
• Provide OEM and ODM services.
• Assist material (Standard, Steel Grade) selection and metallurgical properties of our products.
• Assist inspection and interpretation of specifications to Classification Society.
• Assure products to meet requirement.
• Minimize logistics of dealing with large shipments.
• Investigate problems when they occur.
Raw Material Stocks
