What material is stkm12c?
JIS G 3445 Grade STKM 12C Tubes are low-cost Low Carbon Steel Tubes with max 020 % carbon content with combination of max 060 % manganese easy to form and shape .
STKM 12B carbon steel pipe and STKM 12C carbon steel round pipe are two types of carbon structural steel pipes with different carbon contents produced according to Japanese Industrial Standard (JIS) G3445. The main difference between these two steel pipes is their carbon content, with STKM 12B having a lower carbon content and STKM 12C having a slightly higher carbon content. Due to the difference in carbon content, their mechanical properties will also vary. Generally, as the carbon content increases, the strength and hardness of the steel pipe will increase.
Chemical Composition
| Grade | Chemical Composition % | |||||
| C | Si | Mn | P | S | Nb or V | |
| STKM12A | ≤0.20 | ≤0.35 | ≤0.60 | ≤0.040 | ≤0.040 | - |
| STKM12B | ||||||
| STKM12C | ||||||
Mechanical Properties
| Grade | Mechanical Properties | Flattening Test | Bending Test | |||
| Tensile Strength (MPa) |
Yield Strength (MPa) |
Elongation (%) | Distance between that parts (D=OD) |
Bend Angle |
Inside Radius (D=OD) |
|
| No.11: Specimen | ||||||
| STKM12B | 240 (392) |
228 (275) |
225 | 2/3D | 90° | 6D |
| STKM12C | 248 (471) |
236 (353) |
220 | - | - | - |
Carbon Steel Mechanical Tubing
Steel grade: STKM11A, STKM12(A, B, C),
Out-diameter: 4mm-80mm
Wall thickness: 0.5mm-13mm
Application: For machines, automobiles, bicycles, furniture, tools and utensils, and other machine parts
Technology: Cold-drawn
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