01
ASTM A387 / A387M
Pressure vessel plates, alloy steel
Standard specification for pressure vessel plates, alloy steel, chromium-molybdenum.
Alloy Steel — Industrial Product
Alloy Steel Plate
Low-alloy 4140 steel plate supplied to ASTM A387 / EN 10028-2, normalized and tempered for pressure vessel applications.
Indicative priceUSD 850 - 1,150 / MT
Lead time15 - 25 working days
01
Overview
Alloy Steel Plate combines low-alloy 4140 chemistry with chromium and molybdenum additions for reliable mechanical performance at elevated temperatures and consistent dimensional control. The normalized and tempered condition delivers proven strength, toughness and weldability, making the plate suited to pressure vessel fabrication, power generation components, petrochemical equipment and heavy machinery frames. Supplied to ASTM A387 / EN 10028-2 with mill test certification per EN 10204 3.1, it supports global procurement for high-temperature and high-pressure structural projects.
Key Characteristics
- 01 High Strength Provides high mechanical strength for demanding structural and industrial applications.
- 02 High Hardness Provides increased surface hardness and resistance to mechanical wear.
- 03 Wear Resistance Provides improved resistance to abrasive and mechanical wear.
- 04 Impact Resistance Offers good resistance to impact loading and sudden mechanical stress.
- 05 Good Toughness Provides good toughness and resistance to brittle fracture.
- 06 Standard Compliance Manufactured and supplied in accordance with the specified material and product standards.
Typical Applications
- Pressure Vessels Shell, head and nozzle components for pressure vessels designed to ASME, EN or equivalent codes.
- Machinery & Equipment Shafts, gears, housings, frames and other components for industrial machinery and OEM equipment.
- Shipbuilding Hull, structural sections and piping for commercial and naval vessels.
02
Specifications
Numbers in this section correspond to the applicable product standard, formatted for direct use in enquiry and approval documents.
Product specification
- Material
- Low-alloy steel
- Grade
- 4140 / 1.7225 / 42CrMo4
- UNS designation
- G41400
- Product form
- Plate / sheet
- Manufacturing method
- Hot rolled / cold rolled
- Surface / condition
- Mill finish
- Cross-section
- Flat rectangular section, uniform thickness
Supply specifications
- Thickness
- 0.5 - 100 mm
- Width
- 1,000 - 3,000 mm
- Length
- 2,000 - 12,000 mm
- Tolerance
- According to ASTM A480 / EN 10051
- Surface finish
- Mill finish
- Edge condition
- Mill edge; slit edge on request
- Marking
- Standard mill marking; customer marking on request
Final supply is confirmed against the project drawing, purchase agreement and the mill test certificate.
Chemical composition
ElementRequirement
C 0.30 - 0.40 %
Si 0.15 - 0.40 %
Mn 0.60 - 0.90 %
P <= 0.035 %
S <= 0.040 %
Cr 0.80 - 1.10 %
Mo 0.15 - 0.25 %
Fe Balance
Reference: applicable standard Alloy Steel.
Mechanical properties
PropertyRequirement
Tensile strength >= 655 MPa
Yield strength (0.2% offset) >= 415 MPa
Elongation in 50 mm >= 18 %
Hardness 197 - 235 HB
Reference: applicable standard Alloy Steel at room temperature.
Physical properties
PropertyTypical Value
Density 7.85 g/cm³
Elastic modulus 205 GPa
Thermal conductivity 42 W/m·K at 100°C
Electrical resistivity 0.22 μΩ·m
Specific heat 475 J/kg·K
Melting range 1,450 - 1,520 °C
Thermal expansion 12.0 x 10⁻⁶ /°C
Reference: Typical material values, Alloy Steel.
Reference framework
Standards & documentation
The applicable product, dimensional and inspection standards should be confirmed together in the purchase specification.
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ASME SA387
ASME pressure vessel reference
ASME counterpart of ASTM A387 for pressure vessel plates, alloy steel.
03
EN 10028-2
Flat products for pressure purposes - alloy steels
European reference for flat products for pressure purposes made of alloy steels with specified elevated temperature properties.
04
JIS G4109
Alloy steel plates for pressure vessels
Japanese reference for alloy steel plates for boilers and pressure vessels.
05
GB/T 6654
Pressure vessel plates of carbon and low-alloy steels
Chinese reference for pressure vessel plates of carbon and low-alloy high-strength steels.
06
EN 10204
Inspection documents
Defines inspection document types such as 3.1 and 3.2 for metallic product delivery.
03
Capability
From custom dimensions and precision sizing to heat treatment, surface finishing and product-specific processing, Wayland coordinates supply solutions tailored to your requirements.
Cutting
Cut-to-length and custom cutting according to order requirements.
Custom Dimensions
Non-standard dimensions, tolerances and dimensional combinations subject to product and mill capability.
Precision Sizing
Precision sizing and dimensional control for tighter tolerance requirements.
Cold Working
Cold drawing, cold sizing and other cold-working processes where required.
Heat Treatment
Heat treatment according to material, specification and applicable standard.
Surface Finishing
Surface treatment and finishing according to product, specification and application requirements.
Forming
Bending, forming and other shape modification according to drawings or order requirements.
Machining
Turning, drilling, milling and other machining operations where required.
Customization
Custom dimensions, lengths, surface conditions, end preparations and inspection requirements can be supplied according to project specifications. Final capability is confirmed per enquiry based on grade, size range and applicable standard.
04
Quality
Inspection and documentation procedures are coordinated to meet the requirements of the applicable product standard and the project specification.
- Dimensional inspection Geometry, dimensions and tolerances against the applicable standard
- Visual and surface inspection Surface condition, marking and overall appearance
Documents
- Inspection Report
- Chemical analysis Per heat, against the applicable standard
- Mechanical testing Tensile, yield, elongation and hardness
- Non-destructive testing UT, eddy-current, hydrostatic or other NDT as applicable
- Positive material identification PMI for alloy verification when required
Documents
- Mill Test Certificate (MTC)
- Heat number traceability Heat number carried through MTC and product marking
- Third-party inspection coordination SGS / BV / TÜV on request
Documents
- Third-Party Inspection Report
- EN 10204 documentation 3.1 MTC standard; 3.2 on request
Documents
- EN 10204 3.1 Mill Test Certificate
- EN 10204 3.2 Inspection Certificate
- Certificate of Origin
05
Selection
A well-prepared specification is the most efficient defence against clarification cycles.
- 01 Select material & grade
Choose the material grade according to service conditions, performance requirements and applicable standards.
- 02 Define size & supply condition
Specify the required dimensions, surface condition, heat-treatment condition and delivery requirements.
- 03 Confirm standard & requirements
State the applicable product standard, dimensional standard and governing project specification.
- 04 Define inspection & documentation
Confirm inspection, testing, certification and documentation requirements before order placement.
Example procurement specification
A complete specification suitable for enquiry, covering product, technical requirements, certification and delivery terms.
- Product
- Alloy Steel Plate
- Grade
- 4140
- Standard
- ASTM A387
- Dimensions
- Thickness 10 mm × Width 2000 mm × Length 6000 mm
- Condition
- Annealed; Pickled; Mill Edge
- Certification
- EN 10204 3.1 Mill Test Certificate
- Quantity
- 20 Metric Tons
- Packaging
- Seaworthy Export Packing
- Incoterm
- CIF Hamburg
06
Logistics
From mill dispatch to destination port, each stage is coordinated with the nominated forwarder and documented against the purchase specification.
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Packaging
Export-suitable packaging with surface and edge protection.
Bundled, wrapped or crated according to product form and transport mode. Outer surface protected with weather-resistant material; ends and edges shielded against transit damage.
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Loading
FCL container for standard sizes; break bulk for oversized cargo.
Container loading via nominated forwarder. LCL and dimensions outside container allowance coordinated against the mill dispatch schedule.
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Documentation
Commercial invoice, packing list and certificate of origin.
Mill documentation travels with the shipment. EN 10204 3.1 / 3.2 certificates and third-party inspection reports provided as per purchase specification.
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Shipment
Sea freight as standard; alternative routes on request.
FCL / LCL container shipment or break bulk for oversized dimensions. Logistics coordinated through the nominated forwarder.
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Delivery
FOB · CFR · CIF · FCA · EXW arrangements available.
Incoterm 2020. Port of loading: Shanghai / Ningbo / Shenzhen. Final destination and terms confirmed per enquiry.
07
FAQ
Most enquiries reduce to a small set of recurring technical questions.
01 What is alloy steel pressure vessel plate?
4140 / 42CrMo4 alloy plate (ASTM A387 Grade 11 / 22 family) is used for elevated-temperature pressure vessels, boilers and heat exchangers.
02 What delivery condition is standard?
Alloy plate is supplied in normalized, normalized and tempered, or quenched and tempered condition depending on grade and thickness.
03 What testing is performed?
Chemical analysis, tensile, impact (Charpy), hardness and ultrasonic testing per ASTM A387 / EN 10028-2. Additional NDT can be arranged.
04 What thickness range is available?
Standard plate thickness 5 - 200 mm. Heavier thicknesses available on request.
05 Is impact testing at low temperature available?
Yes. Charpy impact testing at specified sub-zero temperatures (-20 °C / -40 °C / -46 °C) is available per project specification.