What is the hardness of P355N?

What is the hardness of P355N?

P355N steel, a normalized, weldable pressure vessel steel (EN 1.0562), typically has a Brinell hardness value around 120-160 HB for thinner sections, though specific values depend on thickness, with strength requirements (yield 355 MPa, tensile 490-650 MPa) often prioritized over hardness, noted for good toughness.

Grade P355N is a chromium and molybdenum containing Alloy Steel. The typical chemistry of an EN 10216-3 P355N Seamless Tubes is produced with a max of 0.30% Chromium in addition to a max of 0.08% Molybdenum, which improves several properties. Because molybdenum has refraction properties, its inclusion in the alloy makes the en 10216 3 p355n pipes more resistant to heat, while also improving its strength and corrosion resistance properties.

For a fabricator, P355N is a reliable, weldable pressure vessel plate that offers a balance between cost-effectiveness and high performance. It is supplied as a normalized plate, meaning it has been treated at the mill to remove the internal stresses caused during the rolling process.

Decoding the Name:

P: The "Pressure" prefix tells the welder that this material requires specific filler metals that match its high-strength properties.

355: 355MPa is the baseline yield strength, allowing for thinner wall designs compared to lower grades like P265.

N: The "Normalized" suffix guarantees that the plate won't warp excessively when cut or welded.

Key Comparison:

P355N is often compared to P355NL1 and P355NL2. While P355N is impact tested at -20°C, the "NL" versions are "Low Temperature" variants. NL1 is tested at $-40$°C and NL2 at $-50$°C. If your project is in a sub-zero environment (like Alaska or Siberia), you would upgrade from N to NL2.

Key Characteristics:

Excellent Cold Formability: Despite its strength, it can be rolled into cylinders or pressed into dished ends without cracking.

HIC Resistance: It can be specially ordered with resistance to Hydrogen Induced Cracking, which is essential for "sour service" in the oil industry.

Ease of Cutting: Its uniform hardness makes it ideal for laser, plasma, or oxy-fuel cutting with minimal heat-affected zone (HAZ) issues.

Common Applications:

Commonly used to build road tankers for transporting pressurized liquids, compressor housings, and large-diameter water transmission pipes that operate under high head pressure.

What is P355N material specification?

P355N is a European standard (EN 10028-3, EN 10216-3) weldable, fine-grain alloy steel for pressure purposes, known as a high-strength low-alloy (HSLA) steel, used in boilers, pressure vessels, and piping, characterized by a minimum yield strength of 355 MPa, good weldability, and strength at elevated temperatures due to chromium and molybdenum content. The 'P' signifies pressure applications, and 'N' indicates it's supplied in a normalized condition, offering excellent mechanical properties for demanding industrial uses.

What is the density of P355N?

The density of P355N steel, a normalized fine-grain weldable structural steel, is typically around 7850 kg/m³ (7.85 g/cm³), similar to other carbon steels, though exact values can vary slightly based on specific composition and processing, generally falling within the standard steel density range.

What is P355N steel comparable to?

P355N steel (EN 1.0562) is a weldable, non-alloy fine-grained steel for pressure vessels, comparable to other normalized grades like P355NH, P355NL1/NL2, and the structural grade S355J2 (EN 1.0577), offering similar strength (min 355 MPa yield) but differing slightly in temperature suitability or alloying elements like Cr/Mo for specific applications. It's a European standard (EN 10028-3, EN 10216-3) used for boilers and pipelines, with the 'N' indicating normalized delivery,

Equivalent grades of steel P355N (1.0562)

Warning! Only for reference

Chemical composition % of steel P355N (1.0562): EN 10028-3-2009

Mechanical Strength Table of EN 10216-3 Gr P355N alloy steel Tubes

1What is the price of P355N?

The price of P355N steel varies significantly by supplier, quantity, thickness, and location, generally ranging from $400 to over $1,800 per ton, with bulk orders (100+ tons) sometimes hitting lower prices like $650/ton and smaller orders or thick plates costing more, often around $900-$1,300/ton for standard sizes.

2Is P355N steel hard to drill?

Yes, P355N steel can be challenging to drill because it's a high-strength, low-alloy (HSLA) steel, similar to stainless steels in requiring specific techniques, slower speeds, more pressure, and specialized carbide or cobalt bits to manage heat and hardness, preventing dulling and bit failure.

3What is the yield strength of P355N?

The yield strength of P355N steel varies with thickness, typically ranging from a minimum of 355 MPa for thinner sections (≤ 16mm) down to 295 MPa or lower for very thick sections, as it's a normalized, fine-grained steel used for pressure vessels (EN 10028-3). For example, thicknesses over 100mm might have a minimum yield strength of 305 MPa, while thicker plates (over 150mm) could be 295 MPa.

4What are the properties of P355N?

P355N is a weldable, fine-grained, non-alloy steel (EN 1.0562) for pressure vessels, known for its good high-temperature strength and resistance to brittle fracture, supplied in a normalized condition with properties like minimum yield strength of 355 MPa (at +N condition) and tensile strength around 490-630 MPa, featuring low Cr/Mo content for enhanced strength and heat resistance.

5What is P355N material equivalent to ?

P355N (EN 1.0562) is a European fine-grain structural steel, with key equivalents including ASTM A537 Class 1 (US), API 5L Grade X52, and older standards like StE 355 (German DIN) and 2106 (Swedish SS), all characterized by good weldability and strength for pressure vessels, boilers, and pipelines.

6What is the hardness of P355N?

P355N steel, a normalized, weldable pressure vessel steel (EN 1.0562), typically has a Brinell hardness value around 120-160 HB for thinner sections, though specific values depend on thickness, with strength requirements (yield 355 MPa, tensile 490-650 MPa) often prioritized over hardness, noted for good toughness.

7What are the typical application fields of P355N?

P355N is a normalized, fine-grain steel primarily used for pressure vessels, boilers, and pressure piping in industries like oil, gas, chemical processing, and power generation, for manufacturing items such as reactors, heat exchangers, storage tanks, and gas cylinders, valued for its good weldability and performance at various temperatures.

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