SA387 Gr.11 Cl.2 Medium-Temperature Pressure Vessel Steel Plate

SA387 Grade 11 Class 2 is a type of alloy steel plate, specifically a chrome-molybdenum steel, used in pressure vessels and other applications where high temperatures and pressures are encountered. It is known for its resistance to high temperatures and good corrosion resistance.

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Product Description

1.What is the chemical composition of SA 387 GR 11 CLASS2?

Chemical Composition (Weight %)

Element	Standard Requirement (ASTM A387)	Typical Value Range
Carbon (C)	0.05 – 0.17% (max)	0.10 – 0.15%
Manganese (Mn)	0.40 – 0.65% (max)	0.45 – 0.60%
Phosphorus (P)	0.025% (max)	≤ 0.020%
Sulfur (S)	0.025% (max)	≤ 0.015%
Silicon (Si)	0.50 – 0.80%	0.55 – 0.75%
Chromium (Cr)	1.00 – 1.50%	1.10 – 1.40%
Molybdenum (Mo)	0.45 – 0.65%	0.50 – 0.60%

2.What is the difference between SA 516 GR 70 and SA 387 GR 11 CLASS2?

                                                         Material Type & Application

Property	SA 516 Gr. 70	SA 387 Gr. 11 Class 2
Material Type	Carbon steel plate	Chromium-molybdenum (Cr-Mo) alloy steel
Primary Use	Moderate-temperature pressure vessels (e.g., storage tanks, boilers)	High-temperature & high-pressure service (e.g., refinery reactors, power plants)
Service Temp.	Up to ~350°C (650°F)	Up to ~595°C (1100°F)
Corrosion Resistance	Standard (not for H₂S or acidic environments unless specially treated)	Better resistance to hyd

3.What is SA387 grade 11 class 2 material?

SA387 grade 11 CL. 2 Plate is a pressure vessel grade steel plate that is used in high-temperature applications. It is made of a chrome-moly alloy that contains molybdenum and chromium.

4.What is Sa 387 gr 11 cl 2 equivalent to?

The Sa 387 Gr 11 Cl 2 Equivalent Material is the SA387-11-2 of the ASME and ASTM standard. With similar chromium, molybdenum, and chemical content the, Sa 387 Gr 11 Cl 1 Equivalent Material of the BS 621B exhibits identical properties.

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