Both P275 NL1 and P275 NL2 are under the Europe standard EN 10028-3. EN 10028-3 is a kind of specification covers a range of weldable fine grain steels manufactured in the normalized condition and intended for pressure purposes.
EN 10028-3 has three steel grades namely, P275, P355, and P460. In each of these grades the numbers 275/355/460 behind P show the minimum yield strength (in MPa) for plates 16 mm thick and below. Moreover, N and NH indicate impact testing at -20 centigrade degrees or above, NL1 at -40 centigrade degrees or above, and NL2 at -50 centigrade degrees or above.
EN 10028-3 P275 NL1 steels show that EN 10028-3 P275 NL1 steels own a minimum yield strength of 275 Mpa(16 mm thick or below) and should bear a -40 centigrade degrees impact tests. While EN 10028-3 P275 NL2 steels have a a minimum yield strength of 275 Mpa(16 mm thick or below) and should bear a -50 centigrade degrees impact tests.
P460NL1 and P460NL2 are European standard (EN 10028-3) weldable, fine-grain steel plates for pressure vessels and boilers, with the key difference being their impact testing temperature, where NL1 is tested at -40°C and NL2 at -50°C, making NL2 suitable for lower operating temperatures, while both offer a minimum yield strength of 460 MPa and excellent formability for demanding applications like power plants and the chemical industry.
Key Characteristics
Standard: EN 10028-3 (Steels for pressure purposes).
Type: Weldable fine-grain steel.
Application: Boilers, pressure vessels, storage tanks, pipelines, heat exchangers.
Designation Breakdown:
P: Pressure purposes.
460: Minimum yield strength of 460 MPa (for certain thicknesses).
NL1/NL2: Impact testing criteria.
Differences: NL1 vs. NL2
P460NL1: Tested for impact energy at -40°C (or above).
P460NL2: Tested for impact energy at -50°C (or above), offering better performance in colder environments.
Mechanical Properties (General)
Yield Strength (ReH): Minimum 460 MPa (varies slightly by thickness).
Tensile Strength (Rm): Typically 570 - 720 MPa (also varies by thickness).
Processing & Supply
Requires normalization during mill processing to achieve its fine-grain structure.
Available in various delivery states (normalized, tempered, etc.) to meet specific customer needs.
