STKM14A: Characteristics, Features, Uses, 

Chemical Composition, and Mechanical Properties

Characteristics

STKM14A is a type of carbon steel tube known for its excellent machinability and weldability. It is widely used in the manufacturing industry due to its robust performance and reliability. This steel grade is known for its fine surface finish and precision dimensions.

Features

High Machinability: STKM14A can be easily machined, making it suitable for various industrial applications.

Excellent Weldability: The material welds well without preheating, ensuring strong and durable joints.

Fine Surface Finish: Provides a smooth and aesthetically pleasing finish, enhancing the quality of the final product.

Precision Dimensions: Ensures consistent performance and reliability in engineering applications.

Uses

STKM14A is extensively used in:

Automotive Industry: For manufacturing components like shock absorbers, steering systems, and other critical parts.

Construction: Used in structural applications due to its strength and durability.

Machinery: Ideal for machine parts that require high precision and reliability.

Furniture: Used in making durable and robust furniture frames.

Chemical Composition

The typical chemical composition of STKM14A is as follows:

Carbon (C): 0.10-0.20%

Manganese (Mn): 0.30-0.60%

Phosphorus (P): ≤ 0.040%

Sulfur (S): ≤ 0.040%

Mechanical Properties

Tensile Strength: 295 - 490 MPa

Yield Strength: 195 MPa (minimum)

Elongation: 35% (minimum)

Hardness: Below 163 HB

JIS: STKM14A

ASTM: ASTM A513 Type 1

DIN: DIN 2393 St 37-2 or E235

​Conclusion

STKM14A is a versatile carbon steel tube with excellent machinability, weldability, and precision, making it suitable for a wide range of industrial applications. Its balanced chemical composition and mechanical properties ensure reliable performance in demanding environments.