Product Overview
SA387 Alloy Steel Pressure Vessel Plates are chromium-molybdenum alloy steel plates manufactured to ASTM A387 / ASME SA387 standards. Available in multiple grades, they provide high-temperature strength, pressure resistance, and good weldability for boilers, pressure vessels, heat exchangers, and refinery equipment.
Technical Specifications
|
Item |
Specification |
|
Product Grade |
Gr. 2, Gr. 5, Gr. 9, Gr. 11, Gr. 12, Gr. 21, Gr. 21L, Gr. 22, Gr. 22L, Gr. 91 |
|
Standard |
ASTM A387 / ASME SA387 |
|
Available Class |
Class 1, Class 2 |
|
Thickness |
4.8-250 mm (3/16"-10"), heavier plates upon request |
|
Width |
1,000-4,000 mm |
|
Length |
3,000-18,000 mm |
|
Delivery Condition |
Normalized & Tempered (N+T), Quenched & Tempered (Q+T) |
|
Edge Type |
Mill Edge (ME), Trimmed Edge (TE) |
|
Surface Condition |
As Rolled, Shot Blasted, Primed, Pickled (optional) |
Chemical Composition
|
Grade |
C |
S |
P |
Mn |
Cr |
Mo |
Si |
V |
|
Gr. 2 |
0.05-0.21 |
0.025 |
0.025 |
0.55-0.80 |
0.50-0.80 |
0.45-0.60 |
0.15-0.40 |
- |
|
Gr. 5 |
0.15 |
0.025 |
0.025 |
0.30-0.60 |
4.00-6.00 |
0.45-0.65 |
0.5 |
- |
|
Gr. 9 |
0.15 |
0.025 |
0.025 |
0.30-0.60 |
8.00-10.00 |
0.90-1.10 |
1.00 |
0.04 |
|
Gr. 11 |
0.05-0.17 |
0.025 |
0.025 |
0.40-0.65 |
1.00-1.50 |
0.45-0.65 |
0.50-0.80 |
- |
|
Gr. 12 |
0.05-0.17 |
0.025 |
0.025 |
0.40-0.65 |
0.80-1.15 |
0.45-0.60 |
0.15-0.40 |
- |
|
Gr. 21 |
0.05-0.15 |
0.025 |
0.025 |
0.30-0.60 |
2.75-3.25 |
0.90-1.10 |
0.5 |
- |
|
Gr. 21L |
0.10 |
0.025 |
0.025 |
0.30-0.60 |
2.75-3.25 |
0.90-1.10 |
0.5 |
- |
|
Gr. 22 |
0.05-0.15 |
0.025 |
0.025 |
0.30-0.60 |
2.00-2.50 |
0.90-1.10 |
0.5 |
- |
|
Gr. 22L |
0.1 |
0.025 |
0.025 |
0.30-0.60 |
2.00-2.50 |
0.90-1.10 |
0.50 |
- |
|
Gr. 91* |
0.08-0.12 |
0.010 |
0.020 |
0.30-0.60 |
8.00-9.50 |
0.85-1.05 |
0.20-0.50 |
0.18-0.25 |
Mechanical Properties
|
Tensile Strength (ksi) |
Tensile Strength (MPa) |
Yield Strength (ksi) |
Yield Strength (MPa) |
Elongation in 2 inches (%) |
||
|
A 387 Grade 5 |
Class 1 |
60-85 |
415-585 |
30 |
205 |
18 |
|
Class 2 |
75-100 |
515-690 |
45 |
310 |
18 |
|
|
A 387 Grade 9 |
Class 1 |
60-85 |
415-585 |
30 |
205 |
18 |
|
Class 2 |
75-100 |
515-690 |
45 |
310 |
18 |
|
|
A 387 Grade 11 |
Class 1 |
60-85 |
415-585 |
35 |
240 |
22 |
|
Class 2 |
70-90 |
485-620 |
45 |
310 |
22 |
|
|
A 387 Grade 12 |
Class 1 |
50-80 |
380-550 |
33 |
230 |
22 |
|
Class 2 |
65-85 |
450-585 |
40 |
275 |
22 |
|
|
A 387 Grade 22 |
Class 1 |
60-85 |
415-585 |
30 |
205 |
18 |
|
Class 2 |
75-100 |
515-690 |
45 |
310 |
18 |
Key Benefits
Chromium-Molybdenum Alloy Composition provides reliable mechanical strength for elevated-temperature pressure service.
Excellent Weldability reduces fabrication time and improves manufacturing efficiency.
Heat-Treated Delivery Conditions ensure consistent mechanical properties before fabrication.
Wide Size Availability minimizes secondary processing and improves material utilization.
Typical Applications
- Pressure vessels
- Industrial boilers
- Heat exchangers
- Petrochemical reactors
- Hydrogen processing units
- Refinery process equipment
Processing Services
|
Service |
Description |
|
CNC Plate Cutting |
Flame, plasma, or laser cutting to customer dimensions. |
|
Beveling |
Machining welding bevels according to drawing requirements. |
|
Edge Milling |
Precision edge preparation for fabrication. |
|
Drilling |
CNC drilling for bolt holes and assembly requirements. |
|
Surface Shot Blasting |
Removes mill scale and improves coating adhesion. |
|
Primer Coating |
Shop primer applied for temporary corrosion protection. |
Quality Assurance
Quality Control Process
- Raw material chemical composition verification (Optical Emission Spectrometer)
- Steelmaking process control
- Rolling thickness inspection
- Heat treatment parameter monitoring
- Tensile strength test
- Yield strength test
- Elongation test
- Charpy V-notch impact test (when specified)
- Hardness testing
- Ultrasonic Testing (UT) according to ASTM A578 or EN 10160
- API 934 testing for severe hydrogen service (upon request)
- Dimensional inspection
- Surface defect inspection
- Material identification and heat number traceability
- Final inspection before shipment
Certifications
|
Certification |
Meaning |
|
ASTM A387 |
Standard specification for chromium-molybdenum alloy steel pressure vessel plates. |
|
ASME SA387 |
ASME specification for pressure vessel applications under the Boiler & Pressure Vessel Code. |
|
ASME Boiler & Pressure Vessel Code Section II |
Material requirements for ASME pressure equipment manufacturing. |
|
EN 10204 3.1 |
Manufacturer-issued material inspection certificate with test results. |
|
EN 10204 3.2 |
Third-party witnessed material inspection certificate. |
|
ISO 9001 |
Quality management system certification for manufacturing processes. |
Packaging & Shipping
Export Packing: Steel strips bundling with wooden supports or export steel pallets.
Rust Protection: Anti-rust oil, waterproof paper, plastic film, and seaworthy wrapping available.
Plate Separation: Steel spacers placed between plates for safe unloading.
Identification: Heat number, plate number, grade, size, and batch labels for full traceability.
Loading Method: Container loading or bulk vessel shipment depending on plate dimensions.
Shipping Method: FCL, LCL, break bulk, or bulk vessel according to order quantity.
FAQ
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