ASME SA387 Gr.12 Cl.2 Alloy Steel Plates Premium Strength For High Pressure Vessel Boiler Construction
ASME SA387 Gr.12 Cl.2 Alloy Steel Plates Premium Strength for High Pressure Vessel and Boiler Construction
Products Specification
| Product Name | SA387 GR12 CL2 Steel Plate |
| Thickness | 3mm~300mm,2mm-100mm is common thickness,also can customize |
| Width | 1000~3000mm,common width is 1250mm,1500mm,2000mm,2200mm |
| Length | 1000~12000mm,can as your request cut |
| Surface | Clean,finished, blasting and painting or as your request |
| Delivery | Hot Rolled, Controlled Rolling,Normalizing,Annealing, Tempering,Quanching, Q+T |
| Packing | Steel Strapping,fixing in the Container,can customize |
| Thickness tolerance | ±0.3mm |
| Application | It is mainly used to make structural parts such as car girder, beam, transmission shaft and car chassis parts, which can reduce the weight of the parts. |
SA387 Gr12 Cl2 Chromium-Molybdenum Alloy Steel Plate
For High-Temperature Pressure Vessels & Hydrogen Service
1. Introduction
SA387 Gr12 Cl2 is a low-alloy chromium-molybdenum steel plate standardized under ASTM/ASME SA387, designed for welded pressure vessels operating at elevated temperatures (up to 538°C / 1000°F). Supplied in Normalized and Tempered (N+T) condition (Class 2), it delivers superior creep strength, hydrogen resistance, and weldability for critical petrochemical, power, and oil/gas applications.
2. Chemical Composition (Weight %)
| Element | Min | Max | Key Role |
|---|---|---|---|
| Carbon (C) | – | 0.15 | Weldability, ductility |
| Manganese (Mn) | 0.30 | 0.60 | Deoxidation, strength |
| Phosphorus (P) | – | 0.025 | Purity control (impurity) |
| Sulfur (S) | – | 0.025 | Purity control (impurity) |
| Silicon (Si) | 0.15 | 0.40 | Deoxidizer, strength |
| Chromium (Cr) | 0.80 | 1.25 | Oxidation/hydrogen resistance |
| Molybdenum (Mo) | 0.45 | 0.65 | High-temp strength, carbide stability |
| Residuals (Cu, Ni, etc.) | – | ≤0.50 | Trace control |
Note: Strict control of P+S ≤ 0.035% minimizes hot cracking.
3. Mechanical Properties
| Property | Value (Typical) | Test Standard |
|---|---|---|
| Tensile Strength (Rm) | 515–690 MPa (75–100 ksi) | ASTM A370 |
| Yield Strength (Rp0.2) | ≥310 MPa (≥45 ksi) | ASTM A370 |
| Elongation (A5) | ≥22% (in 50 mm) | ASTM A370 |
| Hardness (Brinell HBW) | 163–220 | ASTM E10 |
| Impact Toughness | ||
| - Charpy V-Notch (min) | 27 J @ -30°C (-22°F) | ASTM A20 / EN 10045 |
| Elevated Temp Strength | ||
| - 550°C (1022°F) Design Stress | ~70 MPa (Ref: ASME II-D) | ASME Section II |
4. Product Standards & Certifications
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Primary Standard: ASTM SA387 / ASME SA387
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Delivery Condition: Class 2 (Normalized + Tempered)
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Testing Compliance:
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Tensile/Yield/Elongation: ASTM A370
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Impact Test: ASTM A20 / ASTM E23
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Ultrasonic Testing: ASTM A435 (Optional Level B)
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Certificates:
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EN 10204 3.1/3.2 Mill Test Report (MTR)
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NACE MR0175 / ISO 15156 (Sour Service)
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PED 2014/68/EU Annex I (CE Mark)
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Material Traceability (Heat No., Melt Analysis)
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5. Specification & Dimensions
| Parameter | Range | Tolerance |
|---|---|---|
| Thickness | 6 mm – 250 mm | ASTM A20/A20M |
| Width | 1500–4500 mm | EN 10029 Class N |
| Length | 6000–18000 mm | EN 10029 Class N |
| Form | Hot-rolled plate | |
| Surface Finish | Blasted (Sa 2.5) or mill finish | SSPC-SP 6 / ISO 8501-1 |
6. Equivalent Grades
| Country/Region | Equivalent Standard | Grade |
|---|---|---|
| China | GB/T 713.2 | 15CrMoR |
| EU | EN 10028-2 | 13CrMo4-5 (1.7335) |
| Japan | JIS G 4109 | SCMV2 |
| Germany | DIN 17155 | 15Mo3 (Close) |
| Russia | GOST 5520 | 15ХМ |
| ISO | ISO 9328-2 | P265GH (Partial) |
7. Applications
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Petrochemical:
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Hydrocracker reactors, hydrogenation vessels
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Catalytic reforming units, amine contactors
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Power Generation:
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Boiler drums (≤550°C), steam headers
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Superheater supports, turbine casings
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Oil & Gas:
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Sour gas separators (NACE-compliant)
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LNG heat exchanger shells
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General Industry:
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High-temperature storage tanks
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Process piping & heat recovery systems
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Get in Touch
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