Alloy Steel Plates is steel this is alloyed with a different elements in overall quantities among 1.0% and 50% by weight to enhance its mechanical properties. Alloy steels have to type which is low-alloy steels and high-alloy steels. The difference between the two is relatively arbitrary.
ALLOY STEEL PLATES & Sheets, A330 PLATE, ALLOY 20 PLATES, ALLOY 400 PLATES, ALLOY 625 PLATES, ALLOY 825 PLATE Stockiest , Supplier , Importer and Exporter.
Range note: Alloy 330, Alloy 20, Alloy 400, Alloy 625 and Alloy 825 are nickel alloys, described on our High Nickel Alloys Plates page. The product pages linked from this category cover chromium-molybdenum alloy steel plate for pressure equipment.
As plates, these include strength, hardness, toughness, wear resistance and corrosion resistance. Many of the alloy steels are easy to machine, stamp and fabricate and can be manufactured to precise tolerances.
Alloy steel plates are defined as steel plates with a definite range or definite minimum quantity of additional elements, depending on the alloy. Common alloying elements include:
- Aluminum
- Boron
- Chromium up to 3.99%
- Cobalt
- Columbium
- Molybdenum
- Nickel
- Titanium
- Tungsten
- Vanadium
- Zirconium
Chromium content: The list above is a general description of alloying elements. Several chrome moly grades in this range contain more chromium than 3.99%: ASTM A387 Grade 5 is nominally 5% Cr, and Grades 9 and 91 are nominally 9% Cr. Columbium is the older name for niobium. Order against the chemistry limits of the specified standard and grade.
Alloy Steel Plates: Quick Buying Information
| Buying item | Information to specify |
|---|---|
| Specification | ASTM A387, ASME SA387 or EN 10028-2, with the edition required by your design code. |
| Grade and class | A387 / SA387 Grade 5, 9, 11, 12, 22 or 91 and Class 1 or Class 2; or EN 10028-2 16Mo3, 13CrMo4-5 or 10CrMo9-10. |
| Dimensions | Thickness × width × length in mm; number of plates or total weight. |
| Delivery condition | Heat-treatment condition required by the specification, for example normalized and tempered. |
| Additional requirements | Cutting drawing, supplementary tests, certificate type, inspection and destination. |
Looking for engineering alloy steel for shafts and gears? EN19 / 42CrMo4 is listed separately as En19 Plate/42CRMO4 Grade Plate.
Explore Our Alloy Steel Plate Range
Cr-Mo overview
Chrome Moly Plates
Overview of chromium-molybdenum plate for process equipment in elevated-temperature service, across ASME, ASTM and EN standards. Start here if the grade is not yet fixed.
View Chrome Moly Plates
SA / A387
SA 387 Chrome Moly Steels
All A387 / SA387 grades and classes in one place. Confirm the grade, class and heat-treatment condition with your design specification.
View SA 387 Chrome Moly Steels
ASME SA387
ASME SA387 Steel Plates
For ASME code construction. State the code edition and any supplementary requirements your design calls for.
View ASME SA387 Steel Plates
ASTM A387
ASTM A387 Plates
Chromium-molybdenum pressure-vessel plate to the ASTM specification, in Class 1 or Class 2 tensile levels. Specify the edition required.
View ASTM A387 Plates
EN 10028-2
EN-10028-2 Chrome Moly Steels
European pressure-purpose plate with specified elevated-temperature properties. Specify the grade, delivery condition and EN 10029 tolerance class.
View EN-10028-2 Chrome Moly Steels
1.5415
16MO3 Plates
Molybdenum steel to EN 10028-2 for boilers and pressure vessels at moderately elevated temperature. Check the design temperature and delivery condition.
View 16MO3 Plates
1.7335
13CRMO45 Plates
1Cr–½Mo steel (13CrMo4-5) for high-temperature pressure equipment. Confirm thickness-dependent strength values with the standard.
View 13CRMO45 Plates
1.7380
10CRMO910 Plates
2¼Cr–1Mo steel (10CrMo9-10) to EN 10028-2 for boilers, pressure vessels and hot-service equipment. Specify the delivery condition and impact-test temperature.
View 10CRMO910 PlatesASME SA387 and ASTM A387 grade and class pages
| Grade | Nominal Cr–Mo | ASME SA387 | ASTM A387 |
|---|---|---|---|
| Grade 5 | 5% Cr – 0.5% Mo | Class 1 Class 2 | Class 1 Class 2 |
| Grade 9 | 9% Cr – 1% Mo | Class 1 Class 2 | Class 1 Class 2 |
| Grade 11 | 1.25% Cr – 0.5% Mo | Class 1 Class 2 | Class 1 Class 2 |
| Grade 12 | 1% Cr – 0.5% Mo | Class 1 Class 2 | Class 1 Class 2 |
| Grade 22 | 2.25% Cr – 1% Mo | Class 1 Class 2 | Class 1 Class 2 |
| Grade 91 | 9% Cr – 1% Mo, with V and Nb | Class 1 Class 2 | Class 1 Class 2 |
Grade 91 class: ASTM A387 supplies Grades 21L, 22L and 91 at a single tensile-strength level rather than as Class 1 and Class 2, as stated on our ASTM A387 Plates page. Grade 91 pages appear under both class headings here; order Grade 91 against the tensile requirements and edition in your purchase specification.
Compare Chrome Moly Grades Before Purchasing
| Grade family | Nominal chemistry | Typical selection focus | Check before ordering |
|---|---|---|---|
| 16Mo3 | Molybdenum steel, about 0.3% Mo | Boilers and pressure vessels at moderately elevated temperature | Design temperature, thickness and delivery condition |
| Grade 12 / 13CrMo4-5 | 1% Cr – 0.5% Mo | Elevated-temperature pressure equipment specified in 1Cr–½Mo | Standard, class and approval of any comparable grade |
| Grade 11 | 1.25% Cr – 0.5% Mo, higher Si | Refinery and power-plant pressure vessels | Class, simulated PWHT and impact-test requirements |
| Grade 22 / 10CrMo9-10 | 2.25% Cr – 1% Mo | Higher-temperature and hydrogen-service process equipment | Service environment, PWHT and supplementary tests |
| Grade 5 | 5% Cr – 0.5% Mo | Refinery service where higher chromium is specified | Process temperature, sulfur content and fabrication route |
| Grade 9 | 9% Cr – 1% Mo | Higher-chromium elevated-temperature service | Oxidation conditions, heat treatment and welding procedure |
| Grade 91 | 9% Cr – 1% Mo with V and Nb | High creep-strength power and process equipment | Single tensile class, heat-treatment control and welding procedure |
Comparable nominal chemistry is shown for orientation only. EN 10028-2 and ASTM A387 grades are not automatically interchangeable; use the grade approved in your design specification.
How to Select the Right Chrome Moly Plate
- Design temperature
- Pressure
- Service environment
- Design code
- PWHT
Start with the design temperature, pressure, service environment and the design code your equipment is built to. Higher chromium and molybdenum generally raise elevated-temperature strength and oxidation resistance, but they also tighten welding and heat-treatment requirements. Choose Class 1 or Class 2 from your design calculations, and state plate thickness, post-weld heat treatment (PWHT) and any impact, hydrogen-service or ultrasonic requirements before ordering. This guidance supports purchasing; the project engineer's approved grade and specification decide suitability.
In Which applications is Nickel used?
Such As: Turbine Blade of Jet Engine, Spacecraft, Nuclear reactors Electric motors and Transformers.
Application scope: The applications above describe nickel and nickel alloys. Chrome moly alloy steel plates are mainly used in refineries, power plants and chemical plants operating at elevated temperature; see the applications table below and our High Nickel Alloys Plates page for nickel materials.
Standards and Grade Identifiers
| Standard | Scope | Grades in this range |
|---|---|---|
| ASTM A387 / A387M | Chromium-molybdenum alloy steel plates for welded boilers and pressure vessels in elevated-temperature service | Grades 5, 9, 11, 12, 22 (Class 1 and Class 2) and 91 |
| ASME SA-387 | ASME Boiler and Pressure Vessel Code adoption of ASTM A387 (Section II, Part A) | As ASTM A387; state the code edition |
| ASTM A20 / A20M | General requirements for pressure-vessel plates: testing, dimensional tolerances, marking and supplementary requirements | Applies to A387 / SA387 orders |
| EN 10028-2 | Flat products for pressure purposes: non-alloy and alloy steels with specified elevated-temperature properties | 16Mo3 (1.5415), 13CrMo4-5 (1.7335), 13CrMoSi5-5 (1.7336), 10CrMo9-10 (1.7380) |
ASTM A387 and ASME SA387 share chemical and mechanical requirements for the edition ASME adopts; state which designation and edition your design code requires, because the certificate must show it. EN 10028-2 grades are ordered by name or material number, together with the delivery condition the standard specifies for the grade and thickness.
Plate Sizes, Tolerances and Delivery Condition
- Thicknessup to 100 mm
- Widthup to 2500 mm
- Lengthup to 12000 mm
These are the chrome moly plate dimensions listed on our Chrome Moly Plates page; they describe the range offered, not the size of every plate in stock. Plates are available from stock and can be cut to size and shape. Ask for availability against the exact grade, class and dimensions.
For ASTM A387 and ASME SA387, permissible variations in thickness, width, length and flatness follow ASTM A20 / A20M. For EN 10028-2 orders, state the EN 10029 thickness-tolerance class. A387 plates are supplied heat treated — normalized and tempered, or annealed where the specification permits — and EN 10028-2 plates in the delivery condition the standard specifies, such as +N, +NT or +QT. State the condition you require on the enquiry.
Applications and Service Requirements
| Application | Grade family to evaluate | Selection input |
|---|---|---|
| Refinery reactors, drums and separators | Grade 11, Grade 22 | Temperature, hydrogen partial pressure and PWHT |
| Power-plant boilers and headers | 16Mo3, 13CrMo4-5, 10CrMo9-10, Grade 91 | Design temperature, creep requirements and code |
| Heat exchangers and process vessels | Grade 11, Grade 12, Grade 22 | Process temperature, pressure and fabrication |
| High-temperature refinery service | Grade 5, Grade 9 | Sulfur content, temperature and oxidation |
| Chemical-plant equipment at elevated temperature | Grade 12 / 13CrMo4-5, Grade 11 | Process chemistry and operating temperature |
These are material application examples. Final selection depends on the actual service conditions and project specification.
Cut-to-Size Plates and Profiles
Chrome moly plate can be cut to size and shape according to your fabrication and design requirements, and our cutting services include plasma cutting. Send the grade, class, thickness, drawing, cut dimensions, quantity and tolerance requirements. Tell us if cut edges will be welded, bevelled or machined, as Cr-Mo grades can need controlled thermal cutting and edge preparation.
Testing, Material Documents and Traceability
State the certificate type and test scope with the RFQ. A mill test certificate for the plate and the company's quality-system certification are different documents.
| Requirement | What to identify in the order |
|---|---|
| Material certificate | EN 10204 3.1 or 3.2 as required, showing chemistry, mechanical results and heat-treatment condition |
| Heat traceability | Heat number on the plate and certificate; transfer to cut pieces where required |
| Supplementary tests | Only where specified — for example simulated PWHT of test coupons, Charpy impact tests or ultrasonic examination — with methods and acceptance criteria |
| Inspection | Buyer or third-party inspection agency, witness points and report format |
Review our Quality Policy and include your project inspection requirements in the enquiry.
Why Source Alloy Steel Plates from Champak Industries?
Our Mumbai service centre supplies chrome moly plate to ASME SA387, ASTM A387 and EN 10028-2, with a dedicated page for each standard, grade and class. Plates are available from stock and can be cut to size and shape to your drawings, so one enquiry can cover material, processing and documentation for India or export. Read our Company Profile for the wider supply offering.
Alloy Steel Plate Price and Quotation
Price depends on the specification, grade, class, thickness, plate size, quantity, supplementary tests, cutting, inspection, packing and destination. Heavier plates and grades with higher chromium and molybdenum generally cost more per tonne. Send a complete requirement for a quotation stating the offered material, price basis, tax/freight treatment and validity.
Domestic Dispatch and Export Requirements
Our Chrome Moly Plates page notes delivery to customers anywhere in the world through our in-house logistics staff. For domestic orders, give the delivery address and unloading requirements. For exports, specify the destination, delivery terms, packing and marking instructions and the shipping documents required, with your required delivery date.
We Supply Alloy Steel Plates in listed cities in India
Mumbai, Lucknow, Coimbatore, Imphal, Mysore, Ratlam, Delhi, Kanpur, Darjeeling, Jalandhar, Nagpur, Solapur, Kolkata, Allahabad, Dehradun, Jammu, Nashik, Srinagar, Chennai, Ahmedabad, Faridabad, Jamshedpur, Bhadravati, Chattisgarh, Durgapur, Asansol, Hospet, Bellary, Visakhapatnam, Nellore, Surat, Bangalore, Chandigarh, Ghaziabad, Jhansi, Patna, Siliguri, Hyderabad, Stainless Steel Pipe dealers in Salem, Amritsar, Noida, Kochi (Cochin), Mangalore, Indore, Vadodra, Bhubaneswar, Bikaner, Bhavnagar, Tirupur, Ankleshwar, Warangal, Agartala, Thoothukudi, Stainless Steel Pipe suppliers in Pune, We offer fastest delivery in India including Thiruvanthapuram, Jaipur, Aizawl, Guwahati, Kozhikode, Raipur, Vishakhapatnam, Jabalpur, Bhopal, Gwalior, Ludhiana, Rajahmundry, Thane, Agra, Bhubaneshwar, Gurgaon, Madurai, Rajkot, Varanasi, Bhilai, Haridwar, Meerut, Ranchi, Ahmednagar, Akola, Amravati, Aurangabad, Baramati, Beed, Bhandara, Bhiwandi, Buldhana, Chandrapur, Chimur, Dahanu, Dhule, Dindori, Erandol, Gadchiroli, Hatkanangle, Hingoli, Ichalkaranji, Jalgaon, Jalna, Karad, Khed, Yavatmal, Kolaba, Kolhapur, Kopargaon, Latur, Malegaon, Mumbai, Nagpur, Nanded, Nandurbar, Nashik, Osmanabad, Pandharpur, Parbhani, Rajapur, Ramtek, Ratnagiri, Raver, Sangli, Satara, Shirdi, Shirur, Solapur, Thane, Wardha, Washim, Andhra Pradesh, Jammu and Kashmir, Nagaland, Uttarakhand, Haryana, Lakshadweep, Arunachal Pradesh, Jharkhand, Odisha, West Bengal, Himachal Pradesh, Assam, Karnataka, Punjab, Andaman and Nicobar Islands, Puducherry, Bihar, Kerala, Rajasthan, Chandigarh, Meghalaya, Chhattisgarh, Madhya Pradesh, Sikkim, Dadar and Nagar Haveli, Mizoram, Goa, Maharashtra, Tamil Nadu, Daman and Diu, Tripura, Gujarat, Manipur, Telangana, Delhi, Uttar Pradesh in India.
We Supply and Export in listed Country
United States of America, Malaysia, UAE, Indonesia, Saudi Arabia, Iran, Qatar, India, China, United Kingdom, Singapore, Canada, Thailand, South Korea, Turkey, Philippines, Egypt, Germany, Italy, Japan, Russia, Vietnam, Australia, South Africa, Portugal, Morocco, Costa Rica, Kazakhstan, Netherlands, Mexico, Brazil, France, Spain, Taiwan, Nigeria, Bangladesh, Kuwait, Iraq, Ukraine, Poland, Jordan, Romania, Oman, Hong Kong, Venezuela, Colombia, Norway, Chile, Trinidad & Tobago, Greece, Czechia, Belgium, Sri Lanka, Cyprus, Angola, Myanmar (Burma), United Kingdom, Canada, South Korea, Thailand, Netherlands, Spain, Turkey, Australia, Mexico, Pakistan, Vietnam, Brazil, Philippines, France, Taiwan, Poland, South Africa, Russia, Nigeria, Kuwait, Czechia, Norway, Romania, Egypt, Oman, Sweden, Belgium, Hong Kong, Israel, Colombia, Switzerland, Denmark, Finland, Argentina, Venezuela, Peru, Ukraine, Chile, Bangladesh, Portugal, Ireland, Austria, Algeria, Greece, Iraq, New Zealand, Slovakia, Hungary, Kazakhstan, Slovenia, Lithuania, Serbia, Sri Lanka, Bahrain, Bulgaria, Morocco, Tunisia, Croatia, Jordan, Ecuador, Trinidad & Tobago, Estonia, Azerbaijan, Ghana, Lebanon, Cyprus, Dominican Republic, Latvia, Libya, Costa Rica, Cambodia, Macedonia (FYROM), Belarus, Jamaica, Palestine, Turkmenistan
Frequently Asked Questions About Alloy Steel Plates
01What does the Alloy Steel Plates range include?
This category covers chrome moly (Cr-Mo) pressure-vessel plates: ASTM A387 and ASME SA387 Grades 5, 9, 11, 12, 22 and 91 in Class 1 and Class 2, and EN 10028-2 grades 16Mo3, 13CrMo4-5 and 10CrMo9-10. Specify the standard, grade and class you need.
02Is ASME SA387 the same as ASTM A387?
ASME adopts ASTM A387 as SA-387 for code construction, so the chemical and mechanical requirements match the adopted edition unless ASME notes a difference. State which designation and edition your design code requires, because the certificate must show it.
03What is the difference between Class 1 and Class 2?
For the same grade, Class 2 has higher minimum tensile and yield strength than Class 1. Grades 21L, 22L and 91 are supplied at a single tensile level. Choose the class your design calculations and specification require.
04Which grade should I use for elevated-temperature service?
All grades in this range are intended for elevated-temperature pressure equipment; the choice depends on design temperature, pressure, service environment and design code. Higher chromium and molybdenum generally raise creep strength and oxidation resistance, but the engineer's approved grade decides.
05Are EN 10028-2 grades equivalent to ASTM A387 grades?
Some have comparable nominal chemistry — for example 13CrMo4-5 with Grade 12, and 10CrMo9-10 with Grade 22 — but the standards differ in requirements and testing. Do not substitute one for the other without approval under your design specification.
06What plate sizes are available?
Our Chrome Moly Plates page lists thicknesses up to 100 mm, widths up to 2500 mm and lengths up to 12000 mm. Send the exact grade, class and dimensions to confirm availability of a particular plate.
07Can you cut chrome moly plate to size?
Yes. Plates can be cut to size and shape to your fabrication drawings. Send the drawing, thickness, quantities, tolerances and any edge-preparation requirements.
08Which certificates and tests should my RFQ request?
Request the certificate type, heat traceability and any supplementary tests your specification calls for, such as simulated post-weld heat treatment, impact tests or ultrasonic examination. State the acceptance criteria and the inspection agency.
09Is EN19 / 42CrMo4 part of this category?
No. EN19 / 42CrMo4 is an engineering alloy steel for machined and heat-treated parts, listed separately as our En19 Plate/42CRMO4 Grade Plate product. This category covers chrome moly pressure-vessel plate.
10How do I obtain a price and delivery offer?
Send the specification and edition, grade, class, delivery condition, dimensions, quantity, supplementary tests, cutting needs, destination and required date. Include export packing and delivery terms when relevant.