L245NB is a type of oil pipeline pipe. It is made of better material than L245. The N in L245NB means that the L245 steel has been deformed. B means B-grade steel pipe. So L245NB means that the deformation has been corrected on the basis of L245. fire.
L245 is a low-pressure fluid rolled pipe. Its performance is similar to that of 20# seamless pipe. The mechanical properties and chemical composition of L245
Mechanical properties: Yield strength: 245 MPa Tensile strength: 415 MPa Elongation: 21 min
Chemical composition: C: 0.26 Mn: 1.15 S: no more than 0.030 P: no more than 0.030
The N in L245NB means that the L245 steel has been deformed and normalized. B means B-grade steel pipe.
So L245NB means deformation normalization based on L245.
| L245N steel pipe Mechanical properties | ||||||||||
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| Yield strength Rp0,5 MPa (in PSI): | Min: 245 (35 500) | Max: 440 (63 800) | ||||||||
| Tensile strength Rm MPa (in PSI): | Min: 415 (60 200)** | Max: - | ||||||||
| Elongation (% min.): | transverse: 22 | longitudinal: 24 | ||||||||
Impact strength:
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| Hardness (max. HRC): | - |
| L245N seamless line pipe Chemical composition | ||||||||||||||||||||||||||||||||||||||||||||||
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