A387 Pressure Vessel Steel Plate

ASTM A387 Boiler vessel plates are chrome-molybdenum alloy steel plates suitable for welding boilers and high temperature pressure vessels.


ASTM A387 boiler container plate is divided into grade 5, grade 9, grade 11, grade 12, grade 22, grade 91 and other grades according to the alloy elements contained. Except for grades 21L, 22L, 91 and 911, each grade of ASTM A387 boiler vessel plate has two tensile strength categories according to its heat treatment: Class 1 and Class 2. A387 is a chromium-molybdenum alloy steel plate for pressure vessels. It has good high-temperature strength, oxidation resistance and sulfide corrosion resistance. The working environment of this material is harsh, and the working medium is reaction products such as hydrogen, hydrogen sulfide, wax oil, gasoline, diesel, and thermal synthesis gas, as well as raw oil.


Product Parameters

Product NameA387 Pressure Vessel Steel Plate
Production ProcessHot Rolling, Cold Rolling
Material StandardsAISI, ASTM, ASME, DIN, BS, EN, ISO, JIS, GOST, SAE, etc.
Length1m-12m, or Customized Size
Delivery ConditionsRolling, Annealing, Quenching, Tempered or Standard
Surface ProcessOrdinary, Wire Drawing, Laminated Film

Chemical Composition

Level 5S50200≤ 0.150.25-0.660.0250.025≤ 0.553.90-6.100.40-0.70
Level 9K90941≤ 0.150.25-0.660.0250.025≤ 1.057.90-10.100.85-1.15
Level 11K117890.04-0.170.35-0.730.0250.0250.44-0.860.94-1.560.40-0.70
Level 12K117570.04-0.170.35-0.730.0250.0250.13-0.450.74-1.210.40-0.65
Level 22K215900.04-0.150.25-0.660.0250.025≤ 0.501.88-2.620.85-1.15
Class 22LK21590≤ 0.120.25-0.660.0250.025≤ 0.501.88-2.620.85-1.15
Class 91K909010.06-0.150.25-0.660.0250.0120.18-0.567.90-9.600.80-1.10

Mechanical Properties

A387Tensile Strength MpaYield Strength MpaElongation Gauge length 2in.[50mm]%
Level 5  415-58520518
Section Category 231018
Level 9  415-58520518
Section Category 231018
Level 11  415-58524022
Section Category 231022
Level 12  380-55023022
Section Category 227522
Level 22  415-58520518
Section Category 231018

Physical Performance

Physical PerformanceMetricImperial
Density7.7-8.03 g/cm37.7-8.03 g/cm3

Equivalent Material

American StandardASTMEuropean StandardASMEGerman StandardEN 10028English standardDINLegal standardBSRussian standardAFNOR 36206
A387 5SA387 5X12CrMo5
A387 9SA387 9
A387 11SA387 1113CrMoSi5-5621B
A387 12SA387 1213CrMo4-513CrMo44620B15CD2.05
A387 22SA387 2210/11CrMo9-1010CrMo9-10622-515B12CD9-10
A387 91SA387 9110CrMoVNb9-1

Scope of Application

The molybdenum composition in ASTM A387 boiler vessel plate can improve its tensile strength at high temperature, and make it have higher oxidation and corrosion resistance by increasing the lattice strain. ASTM A387 Boiler Container Plates are ideal for use in heat-resistant pressure vessels and sour gas environments.



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