Chrome Molybdenum steel (Chromemoly) ideal for use in high temperature process plant applications.
- Available in thickness range up to 100mm and lengths up to 12000mm and widths up to 2500mm.
- Chrome Molybdenum steel meets international standard specifications.
- ASTM/ASME SA/A 387 – Gr.5 Cl. 2, Gr.11 Cl.2, Gr.12 Cl.2, Gr.22 Cl.2, Gr 91 C1.2.
- BS EN 10028-2 – 16Mo3, 13 CrMo Si 5-5, 13 CrMo 4-5, 10 CrMo 9-10
Reading the grade list: “Cl.” means Class; “C1.2” for Grade 91 should read Cl.2, and ASTM A387 now supplies Grade 91 at a single tensile level rather than as Class 1 or Class 2. Class 1 plate and Grade 9 are also covered by the pages linked below. The EN 10028-2 names are usually written without spaces: 13CrMoSi5-5, 13CrMo4-5 and 10CrMo9-10. 16Mo3 is a molybdenum steel without chromium, included here because it is used for similar elevated-temperature duties.
Champak Industries specialises in chrome moly plates
- Intended primarily for use in the fabrication of process equipment designed for elevated temperature service.
- Chrome moly is the most common name for this group but other names that are used include chromalloy, croalloy, and Cr-Mo (pronounced "cro-mo").
Chrome Moly Plates: Quick Buying Information
| Buying item | Information to specify |
|---|---|
| Standard and edition | ASTM A387, ASME SA387 (state the code edition) or EN 10028-2. |
| Grade and class | A387 Grade 5, 9, 11, 12 or 22 in Class 1 or Class 2, or Grade 91; EN grades 16Mo3, 13CrMo4-5, 13CrMoSi5-5 or 10CrMo9-10. |
| Heat-treatment condition | Normalized and tempered, annealed where permitted, or quenched and tempered; for EN grades +N, +NT or +QT as the standard allows. |
| Dimensions | Thickness × width × length in mm, within the listed range of up to 100 mm thick, 2500 mm wide and 12000 mm long. |
| Supplementary requirements | Simulated PWHT, impact tests, ultrasonic examination and any hydrogen-service tests your specification calls for. |
| Documents and processing | EN 10204 3.1 or 3.2 certificate, inspection agency, cutting drawing and edge preparation. |
Explore Our Chrome Moly Plate Range
Chrome moly plate is offered in two sub-categories: the ASTM / ASME 387 family and the European EN 10028-2 grades. Open a sub-category, or go straight to a standard or grade below it.
SA 387 Chrome Moly Steels
Chromium-molybdenum plate for welded boilers and pressure vessels: Grades 5, 9, 11, 12 and 22 in Class 1 and Class 2, and Grade 91.
Standards in this sub-category
View SA 387 Chrome Moly Steels
EN-10028-2 Chrome Moly Steels
European pressure-purpose plate with specified elevated-temperature properties, ordered by grade name or material number and delivery condition.
Grades in this sub-category
View EN-10028-2 Chrome Moly SteelsASME 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: Current ASTM A387 editions supply Grade 91 at a single tensile-strength level rather than as Class 1 and Class 2. Grade 91 pages appear under both class headings here; order Grade 91 against the tensile requirements and edition in your purchase specification.
Chrome Moly Plates
There are many chromium molybdenum steel products available, each of which has very different chemical and mechanical properties, but they are often grouped as a single category.
Chrome Moly plates from Champak industries are supplier and exporters to the following steel standards:
ASME SA387, ASTM A387, EN10028-2.
Compare Chrome Moly Grades Before Purchasing
| Grade family | Nominal chemistry | Typical selection focus | Welding group (ASME IX) |
|---|---|---|---|
| 16Mo3 | About 0.3% Mo, no chromium | Boilers and pressure vessels at moderately elevated temperature | — |
| Grade 12 / 13CrMo4-5 | 1% Cr – 0.5% Mo | Elevated-temperature pressure equipment in 1Cr–½Mo | P-No. 4 |
| Grade 11 / 13CrMoSi5-5 | 1.25% Cr – 0.5% Mo, higher Si | Refinery and power-plant pressure vessels | P-No. 4 |
| Grade 22 / 10CrMo9-10 | 2.25% Cr – 1% Mo | Higher-temperature and hydrogen-service reactors and vessels | P-No. 5A |
| Grade 5 and Grade 9 | 5% Cr – 0.5% Mo; 9% Cr – 1% Mo | Refinery service with high sulfur or where higher chromium is specified | P-No. 5B |
| Grade 91 | 9% Cr – 1% Mo with V and Nb | High creep-strength power and process equipment | P-No. 15E |
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. The ASME Section IX P-number groups grades for welding-procedure qualification.
How to Select the Right Chrome Moly Plate
- Design temperature
- Pressure
- Hydrogen service
- Design code
- PWHT
Start with the design temperature, pressure and the code your equipment is built to. Higher chromium and molybdenum raise creep strength and resistance to oxidation, sulfidation and high-temperature hydrogen attack, but they also tighten preheat, welding and PWHT requirements. Choose Class 1 or Class 2 from your design calculations, and decide early whether the plate needs simulated PWHT testing, impact tests at a stated temperature, ultrasonic examination or hydrogen-service testing. For hydrogen service, grade selection is normally checked against API 941; the project engineer's approved grade and specification decide suitability.
What do chromium and molybdenum do to steel?
Steel of the alloys chromium and molybdenum bring characteristics which are particularly desirable for units operating in high temperatures. Alloys improve high temperature strength, molybdenum improves high temperature creep strength, both improve hardenability and there are additional benefits from wear resistance, corrosion resistance, and impact resistance. At the same time a chrome moly alloy is relatively easy to fabricate.
Corrosion and fabrication: Chromium improves resistance to oxidation, sulfidation and hydrogen attack at temperature, but chrome moly steels are not stainless; equipment still needs a corrosion allowance or lining where the process is corrosive. “Relatively easy to fabricate” assumes qualified welding with preheat and post-weld heat treatment, which become stricter as alloy content rises.
The Champak Industries range is available from our Mumbai – India service centre . As well as being available from stock, steel plate can be cut to size and shape according to your fabrication and design requirements and all work is governed by our independently accredited and regularly audited quality systems .
Our plates are sourced from the highest quality steel manufacturers in the world and, these manufacturers have been vetted and assessed by our procurement team.
All of our plates and plate products can be delivered to customers anywhere in the world using the services of our own in-house logistics staff.
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: tolerances, testing, marking and supplementary requirements | Applies to A387 / SA387 orders |
| EN 10028-2 | Flat products for pressure purposes with specified elevated-temperature properties | 16Mo3 (1.5415), 13CrMo4-5 (1.7335), 13CrMoSi5-5 (1.7336), 10CrMo9-10 (1.7380) |
Class 2 has higher minimum tensile and yield strength than Class 1 for the same grade. State whether the order is to ASTM A387 or ASME SA387 and the edition, because the certificate must show it. EN 10028-2 grades are ordered by name or material number 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 dimensions listed at the top of this page; they describe the range offered, not the size of every plate in stock. Ask for availability against the exact grade, class and dimensions.
For ASTM A387 and ASME SA387, thickness, width, length and flatness tolerances follow ASTM A20 / A20M. For EN 10028-2, state the EN 10029 thickness-tolerance class. A387 plate is supplied heat treated (normalized and tempered, or annealed or quenched and tempered where the specification permits); EN 10028-2 plate is supplied +N, +NT or +QT as the standard specifies.
Applications and Service Requirements
| Application | Grade family to evaluate | Selection input |
|---|---|---|
| Hydroprocessing reactors and separators | Grade 22, Grade 11 | Hydrogen partial pressure, temperature, thickness and PWHT |
| Boiler drums, headers and steam equipment | 16Mo3, 13CrMo4-5, 10CrMo9-10, Grade 91 | Design temperature, creep requirements and code |
| Heat exchanger shells and process vessels | Grade 11, Grade 12, Grade 22 | Process temperature, pressure and fabrication route |
| High-sulfur refinery service | Grade 5, Grade 9 | Sulfur content, temperature and oxidation |
These are material application examples, not a list of supplied projects. Final selection depends on the actual service conditions and project specification.
Cut-to-Size Plates, Welding and PWHT
Chrome moly plate can be cut to size and shape to your drawings through our cutting services, including plasma cutting. Send the grade, class, thickness, drawing, quantity and tolerances, and say whether cut edges will be bevelled or welded: thermally cut Cr-Mo edges can harden, so preheating before cutting and grinding the edge are often required.
Welding consumables
Matching consumables are normally used, for example E8018-B2 / ER80S-B2 for 1¼Cr–½Mo, E9018-B3 / ER90S-B3 for 2¼Cr–1Mo and B91-type consumables for Grade 91. Low-hydrogen practice is essential; the qualified WPS sets the consumable.
Preheat and PWHT
Preheat, interpass temperature and post-weld heat treatment are set by the code and WPS and rise with alloy content. Tell us the PWHT cycle so test coupons can be given simulated PWHT if your specification requires it.
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, showing standard and edition, grade, class, chemistry, heat treatment and mechanical results |
| Simulated PWHT | Test coupons heat treated to your stated PWHT cycle (an A20 supplementary requirement), where specified |
| Impact and ultrasonic tests | Charpy test temperature and energy; UT standard and acceptance level for thick plate |
| Hydrogen service | Any step-cooling, embrittlement-factor or hardness limits your specification sets, for example for heavy-wall 2¼Cr–1Mo reactors |
| Traceability and inspection | Heat number on plate and certificate, transfer to cut pieces, and buyer or third-party inspection |
Review our Quality Policy and include your project inspection requirements in the enquiry.
Why Source Chrome Moly Plates from Champak Industries?
As stated above, our Mumbai service centre supplies chrome moly plate from stock to ASME SA387, ASTM A387 and EN 10028-2, cuts plate to size and shape, and delivers through in-house logistics staff. Each standard, grade and class has its own page, so you can check the specification before you enquire. Read our Company Profile for the wider supply offering, or go back to Alloy Steel Plates.
Chrome Moly Plate Price and Quotation
Price depends on the standard, grade, class, thickness, plate size, quantity, heat-treatment condition, supplementary tests, cutting, inspection, packing and destination. Grades with more chromium and molybdenum, and heavy plates with simulated PWHT or hydrogen-service testing, generally cost more. Send a complete requirement for a quotation stating the price basis, tax/freight treatment and validity.
Domestic Dispatch and Export Requirements
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 Chrome Moly 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.
Location note: The phrases “Stainless Steel Pipe dealers in Salem” and “Stainless Steel Pipe suppliers in Pune” in the list above refer to the cities of Salem and Pune. This page does not cover stainless steel pipe.
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 Chrome Moly Plates
01What are chrome moly plates?
Chrome moly (Cr-Mo) plates are low-alloy steels containing chromium and molybdenum, made for welded boilers, pressure vessels and process equipment in elevated-temperature service. Common standards are ASTM A387, ASME SA387 and EN 10028-2.
02Which chrome moly grades are available?
ASTM A387 / ASME SA387 Grades 5, 9, 11, 12 and 22 in Class 1 and Class 2, Grade 91, and EN 10028-2 grades 16Mo3, 13CrMo4-5, 13CrMoSi5-5 and 10CrMo9-10.
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. Grade 91 is supplied at a single tensile level in current A387 editions.
04Is Grade 22 the same as 10CrMo9-10?
Both are 2¼Cr–1Mo steels with comparable nominal chemistry, but they are made to different standards with different requirements. Do not substitute one for the other without approval under your design specification.
05Which grade is used for hydrogen service?
Grade 22 (2¼Cr–1Mo) and Grade 11 are common for hydroprocessing equipment, with the grade checked against API 941 for the operating temperature and hydrogen partial pressure. Specify any additional hydrogen-service tests in the enquiry.
06What plate sizes are listed?
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.
07Do chrome moly plates need preheat and PWHT when welded?
Usually yes. Preheat and post-weld heat treatment are set by the design code and the qualified welding procedure, and they become stricter as chromium and molybdenum content rises.
08What is simulated PWHT testing?
It is a supplementary requirement in which plate test coupons are given the same heat treatment as the fabricated vessel before mechanical testing, to show the plate still meets its properties after PWHT. State the PWHT temperature and time if you need it.
09Are chrome moly plates corrosion resistant like stainless steel?
No. Chromium improves resistance to oxidation, sulfidation and hydrogen attack at temperature, but chrome moly steels are not stainless and normally need a corrosion allowance or lining in corrosive service.
10How do I obtain a price and delivery offer?
Send the standard and edition, grade, class, delivery condition, dimensions, quantity, supplementary tests, cutting needs, destination and required date through the form below, by WhatsApp or by phone.