Low-sulfur steel API 2H Gr 50 for offshore platform

API 2H Gr 50 steel is a low-sulfur steel plate for the offshore platform structure, and SM490YB is a Japanese structural steel plate. The executive standard is JISG3106, which can be produced in BBN steel in China. Thickness of API 2H Gr 50 steel plate we supply: 8-100mm.
 
API 2H Gr 50 alloy steel heat treatment:
Quenching heating temperature (℃): 850℃, oil cooling;
Tempering heating temperature (℃): 200℃, water cooling, air cooling;
Metallographic structure: tempered martensite.
 
Low-sulfur steel API 2H Gr 50 with improved thickness direction properties
Provide low-grade sulfide-incorporated steel plates through chemical control methods, thereby reducing the possibility of laminar tearing of the steel plates in the joint weld area. The large sulphur content should be 0.006%. The grade suffix xls, x refers to g, n, qt.
The low nitrogen content to improve notch toughness under aging-strain conditions, the maximum nitrogen content in melting analysis is 0.009%.
Notch toughness requirements at lower temperatures: -67°f (-55°c) drop hammer test “unbreak” or Charpy impact test.
 
API 2H Gr 50 steel plate is a carburized steel with good performance. It has high hardenability. After carburizing and quenching, it has a hard and wear-resistant surface and a tough core. It has high low-temperature impact toughness, medium weldability, and positive Good machinability after fire. It is widely used as carburized parts with small cross-sections and high-load quenched and tempered parts with large cross-sections, such as gears, shafts, spindles, worms, sleeves of governors, friction wheels of transmissions, etc., and can also replace 20CrNi steel Produce parts with small cross-sectional dimensions, medium pressure, and no large impact load.

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