API Steel

API Steel

Composition

PSL 1: 0.22-0.28 Carbon, 1.20-1.65 Manganese, 0.3 Phosphorous, 0.3 Sulfur, ≤0.15 Vanadium, ≤0.15 Neobium, ≤0.15 Titanium

PSL 2: 0.10-0.24 Carbon, 0.40-0.55 Silicon, 1.20-2.10, 0.020-0.025 Phosphorous, 0.01-0.015 Sulfur, ≤0.06-0.15 Vanadium ≤0.06-0.15 Neobium, ≤0.06-0.15 Titanium

Common Shapes

API Steels are available as:

  • Welded and Seamless Pipes

Characteristics

  • Excellent corrosion resistance

  • Great strength under high pressure

Uses

  • Line pipes for Oil, Gas, Petrol, Water and Chemicals

Weldability

Welding of API Steels is usually achieved via either Shielded Metal Arc Welding, or by Self Shielded Flux Core Arc Welding processes.

Machinability

API Steels may be machined for the purpose of threading, or machining coupling connections to the exterior.

Commonly Used Grades

PSL1: | B | X42 | X46 | X52 | X56 | X60 | X65 | X70

PSL2: BM | BN | BQ | BR | X45M/N/Q/R | X46M/N/Q X52N | X56M/N/Q | X60M/N/Q | X65M/Q | X70M/Q X80M/Q | X90M/Q | X100M/Q

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Integ Metals // Materials // Steel // API Steel
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An Introduction

The American Petroleum Institution, or API, is the standards institute for the American Petroleum and Gas industries. For our purposes, their most notable contribution has been standard API 5L: the standard for line pipes used within the industry to transport Oil, Water and Gas. For the 'X' Grades, the two numbers following the 'X' denote the grade's respective minimum yield strength in '000s psi. The standards commitee recognised the need for two levels of Product Specification Level (PSL): PSL 1, for the quality of regular line pipes, and PSL 2 which specifies further testing requirements for chemical use and mechanical properties.

 
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