EN10216-2 P235GH Non-alloy Seamless Steel Tubes For Pressure Purposes

EN10216-2 P195GH P235GH P265GH 20MnNb6 16Mo3 Non-alloy Seamless Steel Tubes For Pressure Purposes

Material Specification

EN10216-2 is a European standard that specifies the technical delivery conditions for seamless steel tubes made from non-alloy and alloy steels with specified elevated temperature properties. These tubes are primarily used for pressure purposes, such as in the construction of boilers, pressure vessels, and pipelines.

Key Features

• High Temperature Resistance: Designed to withstand high temperatures, making them ideal for pressure applications.
• Durability: Offers excellent durability and long service life.
• Versatility: Suitable for a wide range of industrial applications.
• Compliance: Meets stringent European standards for quality and safety.

Chemical Composition

The chemical composition of these steel grades is crucial for their performance in high-temperature environments. Below is a table presenting the typical chemical composition for each grade:

Element (%)	P195GH	P235GH	P265GH	20MnNb6	16Mo3
C	≤ 0.20	≤ 0.16	≤ 0.20	≤ 0.20	≤ 0.12
Si	≤ 0.35	≤ 0.35	≤ 0.40	≤ 0.40	≤ 0.35
Mn	0.70-1.40	0.60-1.20	0.70-1.40	1.20-1.50	0.40-0.90
P	≤ 0.025	≤ 0.025	≤ 0.025	≤ 0.025	≤ 0.025
S	≤ 0.015	≤ 0.015	≤ 0.015	≤ 0.015	≤ 0.010
Cr	-	-	-	-	0.30-0.60
Mo	-	-	-	-	0.25-0.35
Nb	-	-	-	0.02-0.05	-

Mechanical Properties

The mechanical properties of these steel grades are essential for ensuring their performance under pressure. Below is a table presenting the typical mechanical properties for each grade:

Property	P195GH	P235GH	P265GH	20MnNb6	16Mo3
Yield Strength (MPa)	≥ 195	≥ 235	≥ 265	≥ 275	≥ 275
Tensile Strength (MPa)	320-440	360-500	410-570	450-600	440-590
Elongation (%)	≥ 24	≥ 25	≥ 23	≥ 22	≥ 22

Steel Grade

The EN10216-2 standard covers several steel grades, including:

• P195GH: Suitable for low-pressure applications.
• P235GH: Commonly used in the construction of pressure vessels.
• P265GH: Ideal for high-pressure applications.
• 20MnNb6: Known for its excellent strength and toughness.
• 16Mo3: Offers enhanced resistance to corrosion and high temperatures.

Application

These seamless steel tubes are widely used in various industries, including:

• Power Generation: Boilers and heat exchangers.
• Petrochemical: Pressure vessels and pipelines.
• Chemical Processing: High-temperature processing equipment.
• Oil and Gas: Transportation and storage of gases and liquids.

Possible Alternative Grades

Depending on specific requirements, alternative grades may be considered:

• ASTM A106 Grade B: A common alternative for seamless carbon steel pipes.
• ASTM A335 P11: Suitable for high-temperature service.
• DIN 17175: Another European standard for seamless steel tubes.

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