Introduction
The ASTM A387
specification is the Standard Specification for Pressure Vessel Plates, Alloy
Steel, Chromium-Molybdenum intended primarily for use in welded boilers and
pressure vessels designed for elevated temperature service.
Chrome Molybdenum steel
plate, also known as Chrome Moly, is a versatile material widely used in
various industries, including the oil and gas industry, nuclear industry, and
fossil fuel power stations. The addition of molybdenum in the alloy composition
enhances its strength and enables it to withstand higher working temperatures,
while the presence of chromium enhances its corrosion resistance and resistance
to oxidation.
The superior temperature
tensile strength and anti-corrosive properties of Chrome Moly make it an ideal
choice for applications involving saltwater exposure.
Equivalent steel grades
ASTM A387 Grade 11 equivalent steel grades:
|
Country |
USA |
USA |
European |
UK
(British Standard) |
|
Standards |
ASTM |
ASME |
EN
10028 |
BS |
|
Grade |
A387
Grade 11 |
SA387
Grade 11 |
13CrMoSi5-5 |
621B |
Chemical
Composition
The chemical composition
of AISI A387 grade 11 alloy steel is as follows:
Element Content (%)
Iron, Fe 96.16-97.6
Chromium, Cr 1.0-1.50
Silicon, Si 0.50-0.80
Manganese, Mn 0.40-0.65
Molybdenum, Mo 0.45-0.65
Carbon, C 0.050-0.17
Phosphorous, P 0.035
Sulfur, S 0.035
Mechanical Properties
The mechanical properties
of AISI A387 grade 11 alloy steel are as follows:
Tensile strength 515-690
Mpa/ 74700-100000 psi.
Yield strength 310 Mpa/
45000 psi.
Rupture strength (@575
°C, time 3.60e+8 sec/1070 °F, time 100000 hour) 37.0 - 48.0 Mpa/ 5370 - 6960
psi
Elastic modulus 190-210 Gpa/
27557-30458 ksi.
Poisson's ratio 0.27-0.30.
Elongation at break (In
50 mm) 22.00%.
Applications
ASTM A387 Grade 11 steel is characterised by good weldability. ASTM A387 Grade 11 steel is used for manufacturing boilers, pressure vessels and pipes for the transportation of hot liquids. ASTM A387 Grade 11 steel also offer good properties at high and low temperatures. ASTM A387 Grade 11 steel is always supplied in the normalised and tempered condition.
Comments :
0 Comments to “ASTM A387 Grade 11: Chemical Composition, Properties, Equivalent grades”
Post a Comment
If you have any questions, concerns, or feedback about our website, our team is always here to assist you.