Piyush Steel is an established supplier of high quality, superior quality ASTM A387 Grade 12 Alloy Steel Sheet Plate to many different types of customers all over the world. Our primary commitment is to provide high quality metal solutions while ensuring that we provide our customers with unmatched levels of quality, dependability, and satisfaction. ASTM A387 Grade 12 Alloy Steel Sheet Plate is a chrome-molybdenum alloy created to withstand the high temperatures associated with industrial application. The ASTM A387 Grade 12 Plate is known for its excellent heat and pressure resistance and superior performance under conditions in which other types of steel would fail. The exceptional ability of A387 Grade 12 to withstand extreme heat and heat-related conditions, and to provide exceptional resistance to mechanical failure under extreme heat, makes A387 Grade 12 Alloy Steel our number one choice for critical pressure vessels. A387 Grade 12 is also one of the most commonly used materials in the oil and gas industry; chemical processing industry; and electric power generation industry.
Table Of Content
ASTM A387 Gr 12 Steel is a chromium-molybdenum alloy steel. It is a material crafted primarily for use in welded boilers and pressure vessels. These vessels operate in elevated temperature service. The key chemical elements are chromium (Cr) and molybdenum (Mo). Chromium boosts corrosion and oxidation resistance. Molybdenum adds strength at high temperatures. These sheets and plates offer superior strength, excellent durability, and high thermal resistance. They maintain their integrity even when exposed to intense heat and pressure over long periods. Unlike plain carbon steel, this alloy is built to perform reliably in harsh, demanding environments. This specialized composition is what sets it apart from other common alloy steels.
ASTM A387 Grade 12 sheets and plates have a lot of benefits for important uses. These features make sure that it will work well and be safe for a long time in high stress situations.
We manufacture and supply SA 387 Gr 12 Class 1 / Class 2 alloy steel plates according to global standards. Our materials meet all requirements for critical applications. We ensure every product is accurately sized and fully traceable.
We strictly follow ASTM A387 and ASME SA-387 standards. This guarantees you receive a reliable product for your most demanding projects. Our products meet the exact specifications needed for your industry.
Specifications : ASTM A387 / ASME SA387
Standard : ASTM, ASME, and API
Thickness : 4.0mm – 100mm
Specialize : Shim Sheet, Perforated Sheet, B. Q. Profile
Form : Coils, Foils, Rolls, Plain Sheet, Shim Sheet, Perforated Sheet, Chequered Plate, Strip, Flats, Blank (Circle), Ring (Flange)
Finish : Hot rolled plate (HR), Cold rolled sheet (CR), 2B, 2D, BA NO(8), SATIN (Met with Plastic Coated)
Hardness : Soft, Hard, Half Hard, Quarter Hard, Spring Hard etc
Grade : ASTM A387 GR.12 CL.2
Understanding the mechanical properties is vital for engineers. These numbers show how the material reacts when it is hot and under stress. We test our Grade 12 Alloy Steel Sheets a lot to make sure they are strong and tough enough.
These qualities show that the material can withstand high temperatures and pressures. The consistent mechanical strength will keep your installations safe and working well. We provide full documentation verifying these results.
| Grade | A387 / SA387 Grade 12 | |
| Class 1 | Class 2 | |
| Tensile Strength (ksi) | 50-80 | 65-85 |
| Tensile Strength (MPa) | 380-550 | 450-585 |
| Yield Strength (ksi) | 33 | 40 |
| Yield Strength (MPa) | 230 | 275 |
| Elongation in 200mm (%) | 18 | 19 |
| Elongation in 50mm (%) | 22 | 22 |
| Reduction of area (%) | - | - |
The precise chemical composition is what gives ASTM A387 Gr 12 Steel its unique properties. The controlled amounts of chromium and molybdenum are essential.
This exact mix of parts makes the material very hard to break down and heat up. The chemicals' purity affects how well the material holds up over time. We guarantee that the composition of our steel meets these high standards.
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N |
| Alloy Steel Gr 12 | 0.05 – 0.17 | 0.40 – 0.65 | 0.15 – 0.40 | 0.035 max | 0.035 max | 0.80 – 1.15 | 0.45 – 0.60 | – | – |
| Tensile (MPa) | Yield (MPa) | Elongation (50mm) | Elongation (200mm) | Reduction of Area |
| 380 – 550 | 230 min | 22% min | 18% min | – |
Picking the right supplier is just as important as picking the right material. Piyush Steel is a partner you can trust. Our main goal is to offer great products and great customer service. We are ready to handle your order, big or small, with speed and professionalism. We maintain a large, ready stock of ASTM A387 Grade 12 alloy steel sheets that we offer. This means we can meet urgent needs without long delays. We always provide Mill Test Certificates (MTCs). These certificates confirm the quality and compliance of your material. We have extensive global export experience. We manage logistics for delivery anywhere in the world. We offer custom thickness and length options. This ensures you get the exact material you need. Our strict quality control process is managed by certified inspectors. It checks every plate for flaws. We also promise fast dispatch and secure packaging. This ensures your material arrives safely and on time.
We are a certified company and prioritize quality above all else. Before shipment, every batch of Grade 12 Alloy Steel Sheets goes through several tests. These checks ensure the material meets the highest standards of safety and performance. We perform Positive Material Identification (PMI) tests. This confirms the exact chemical composition of the alloy. Hardness tests are done to measure the material's resistance to permanent deformation. We also do tensile tests. These tests check how strong and stretchy the material is when it is under stress. Another important step is ultrasonic testing. This method finds any flaws or defects inside that you can't see on the outside. You can rest easy knowing that these strict quality checks are in place. It ensures that the materials you get are safe, legal, and ready to use.
Getting your material to you in perfect condition is our final promise. Our packaging and delivery methods are designed for maximum security. We understand that damage during transit can cause costly delays. We use strong wooden pallets to hold things up. The steel is covered in a waterproof material to keep it from getting wet and rusting. We also put edge protection on the plates to keep it from getting damaged while handling. Our packaging is of export quality and meets the standards for shipping around the world. We ship all over the world and give you clear timelines for when you can expect your order. We work with logistics partners we trust to make sure your delivery gets to your site quickly and safely, no matter where it is.

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With Mill And Third Party Test Certificate.
ASTM A387 Grade 12 Alloy Steel Sheets & Plates Price List
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