A387GR.11 steel pressure vessel and pipeline steel.
Chrome molybdenum steel (such as A387Gr.11). With the advantages of carbon molybdenum steel is heat resistant strength is slightly higher, but manufacturing is more complex, need whole heat treatment. Cr Mo steels with higher strength, heat resistance, good corrosion resistance, although manufacturing also has a certain degree of difficulty, the need for heat treatment, but the overall performance is good, the price is cheap. According to the 1996 API survey, [2], 1950~1959 years, a large number of carbon steel and C - Mo steel. For 1980~1997 years, extensive use of Cr-Mo steel is shown in figure 7-7. Cr is often used in Mo steel is 1Cr-1/2Mo, 11/4Cr-1/2Mo and 2 1/4Cr-1.0Mo steel, see Figure 7 - 8, since 1970, the number of Cr-Mo steel increased, especially the 1 1/4Cr-1/2Mo steel increased rapidly. Because 1 1/4Cr-1/2Mo steel and 1Cr-1/2Mo steel compared to high allowable stress, less sensitivity to the gap, better heat resistance.
A387 Gr11 steel is low alloy steel.
Chemical composition:
C: 0.05-0.17
Mn: 0.40-0.65
P: 0.035
S: 0.035
Si: 0.50-0.80
Cr: 1.00-1.50
Mo: 0.45-0.65
Compared with
15CrMo in our country.
A387 Gr11 steel for the ASTM material, belongs to 1.25Cr-0.5Mo series heat-resistant steel, have high strength, good oxidation resistance, anti sulfide corrosive at less than 500 DEG C, widely used in coal chemical industry, petroleum chemical industry high temperature and high pressure vessel device. Used in the industries of petroleum, chemical industry, power plant, boiler, for the production of reactor, heat exchanger, separator, tank, oil tank, liquefied gas crown, nuclear reactor pressure vessel, boiler, liquefied petroleum gas bottle, hydropower station high pressure pipes, turbine volute equipment and components.
Selection of welding materials: welding rod, arc welding electrode R307G, submerged arc welding wire / flux: JW-B2/KF-880M.
A387 Gr11 steel delivery status: hot rolling, normalizing, normalizing + tempering, quenching and tempering, etc. A387 Gr11 technical requirements: flaw detection, Z15-Z35 thickness, direction, performance requirements (HIC).
More information about A387 Gr11 steel application and introduction, and if you need factory price of A387 Gr11 steel stock, contact us at any time. Welcome to call for us. We strive for excellence in quality and meticulous in service. We hope to cooperate with us in the near future.
