DIN/EN 10305-1 and DIN/EN 10305-4: Cold-Drawn Seamless Steel Tubes for Gas Cylinders

DIN/EN 10305-1 and DIN/EN 10305-4 are European standards that specify the requirements for cold-drawn seamless steel tubes for various applications, including gas cylinders. These standards outline the delivery conditions, dimensions, and chemical compositions of the steel tubes. In this article, we will focus on the specifications and properties of 42CrMo4 steel tubes for gas cylinders, as defined by DIN/EN 10305-1 and DIN/EN 10305-4.

Specifications

The specifications for 42CrMo4 steel tubes for gas cylinders, as per DIN/EN 10305-1 and DIN/EN 10305-4, are as follows:

• Standard: DIN/EN 10305-1; DIN/EN 10305-4
• Specification: Cold-drawn seamless
• Delivery conditions: BK, BKW, BK+S, GBK, NBK
• Outer diameter: 89-368mm
• Wall thickness: 4-185mm
• Length: 5.8-12m

These specifications ensure that the 42CrMo4 steel tubes meet the necessary requirements for gas cylinder applications, including dimensional accuracy and delivery conditions suitable for various operating conditions.

Chemical Composition

The chemical composition of 42CrMo4 steel tubes, which determines their mechanical properties and performance, is as follows:

• Carbon (C): 0.38-0.45%
• Silicon (Si): ≤0.40%
• Manganese (Mn): 0.60-0.90%
• Phosphorus (P): ≤0.035%
• Sulfur (S): ≤0.035%
• Chromium (Cr): 0.90-1.20%
• Molybdenum (Mo): 0.15-0.30%

These elements contribute to the strength, hardness, and corrosion resistance of the steel tubes, making them suitable for gas cylinder applications.

Physical Properties

The physical properties of 42CrMo4 steel tubes, specifically the tensile strength, yield strength, and elongation, are as follows:

• Tensile strength (Rm): 800-1100 MPa
• Yield strength (YS): 650-900 MPa
• Elongation (A %): ≥13%

These physical properties ensure that the 42CrMo4 steel tubes have the necessary strength and ductility to withstand the high pressures and mechanical stresses experienced in gas cylinder applications.

Conclusion

DIN/EN 10305-1 and DIN/EN 10305-4 standards provide specifications for cold-drawn seamless steel tubes used in various applications, including gas cylinders. The 42CrMo4 steel tubes, conforming to these standards, exhibit excellent mechanical properties and are suitable for gas cylinder applications. The specified delivery conditions, dimensions, and chemical composition ensure that the steel tubes meet the necessary requirements for gas cylinder manufacturing. When selecting 42CrMo4 steel tubes for gas cylinders, it is essential to consider the specific requirements of the application and consult the official standards or the manufacturer for precise information on dimensions, delivery conditions, and mechanical properties.