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P355NB Gas Cylinder Steel

P355NB Gas Cylinder Steel

Grade: P355NB
Type: Pipe/Tube, Plate,
Standard: EN 10120, JIS G3116, DIN 17155
Specification: Thickness 1.5mm-300mm ||||||Width 1000mm-3000mm ||||||Length 3000mm-18000mm
Application:P355NB is widely used in manufacturing gas cylinders by welding cold-formed parts together and normalizing the finished cylinder.

 P355NB Introduction

P355NB Gas Cylinder Steel

Steels for applications such as gas cylinders and pressure vessels according to the standard EN 10120 : 1996 are manufactured to ensure an excellent product life span under optimum safety conditions. Good cold ductility and the excellent performance in use are achieved because these steels are made to be fi ne grained and non-ageing.
P355NB Usage
1) Gas cylinders (butane, propane).
2) Pressurised tanks and containers.
3) Welded pipes for transporting fl uids and gasses.
 

EN P355NB Chemical Composition(%)

 Grade C max Si  max. Mn min P max S max Al total min  N max Nb max Ti max
P245NB 0.16 0.25 0.30 0.025 0.015 0.020 0.012 0.050 0.03
P265NB 0.19 0.25 0.40 0.025 0.015 0.020 0.012 0.050 0.03
P310NB 0.20 0.50 0.70 0.025 0.015 0.020 0.012 0.050 0.03
P355NB 0.20 0.50 0.70 0.025 0.015 0.020 0.012 0.050 0.03

EN P355NB Mechanical Properties 

  Grades Yield Strength (MPa) min Tensile Strength (MPa) min-max Elongation Lo=80mm T<3,0 L0=5,65 √So min% t. 3 à 5 Normalising Temperature (°C)
P245NB 245 360-450 26 34 900-940
P265NB 265 410-500 24 32 890-930
P310NB 310 460-550 21 28 890-930
P355NB 355 510-620 19 24 880-920

Stainless Steel Surface Finishes:

1. No 1 Finish : Used where Heat and corrsoion ressistance is required . Produced by annealing and resealing after hot rolling .

2. No 2D Finish : Dull Cold rolled finish . Used in deep drawn objects which are often polished after fabrication

3. NO 2 B Finish : Bright Cold Rolled Finish . Used in very deep drawn objects .

4. No 3 Finish : Polished finish obtained with abrasives

5. No 4 Finish : Used for kitchen ware , cooking utensils , restaurants and hotel kitchenware , cookware . Obtained with abrasives of 125 mesh and higher

6. NO 7 Finish : Architectural and Ornamental Finish

7. NO 8 Finish : Press plates , small mirrors and reflectors

8. Hairline finish : Ornamental plates , decorative items , name plates , elevators , doors in buildings

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