Grade 91 is a chromium molybdenum alloy steel. As compared to carbon steels, the properties of alloy steels, particularly chromium molybdenum alloy grades such as ASTM A387 Grade 91 Sheet & Plate are suited for pressure purposes. By adding chromium & molybdenum to the steel alloy, the properties of grade 91 go a notch higher. This means the corrosion resistance properties along with resistance to oxidation are also better.
Moreover, the use of deoxidized steel to produce ASTM A387 Grade 91 Sheet also impacts its toughness. Because there are no free air molecules trapped in the alloy, the chances of air bubble formation are drastically reduced. So without any air bubble, the ASTM A387 Grade 91 Alloy Steel Sheet is not porous and there are no weak spots on the material, thus giving rise to a stronger, better product. In order to simplify identification, killed alloy steel SA 387 Gr 91 Plate is marked with the capital letter "K". Grade 91, according to this specification is heat treated. The performance of heat treatment in any form on alloys including the ASTM A387 Grade 91 CL1 plate makes for high quality material, that is able to withstand elevated temperatures. The SA 387 Gr 91 cl2 sheet also exhibits high mechanical strength.
Alloy Steel A387 Gr 91 Plate Specifications | ASTM A387 and ASME SA387 |
ASME SA 387 gr. 91 Alloy Steel Plate Standard | ASTM, ASME and API |
Technique | Hot Rolled |
SA 387 gr. 91 Plate Grade |
|
Thickness of SA 387 Grade 91 Class 2 Plate | 4 MM To 300 MM |
SA 387 Gr 91 Cl 2 Plate Width | 1500 MM To 4200 MM |
SA 387 gr 91 Class 2 Boiler & Pressure Vessel Steel Plate Length | 3000 MM To 18000 MM |
Heat Treatment | Normalized and Drawing-back |
Classification | Alloy quality steel |
A387 Plate Gr 91 Plate Rolling Type | Oil & offshore platform steel plate |
Hardness | Soft, Hard, Half Hard, Quarter Hard, Spring Hard etc. |
ASME SA 387 Grade 91 Class 2 Sheet Form | Coils, Shim Sheet, Foils, Rolls, Strip, Plain Sheet, Perforated Sheet, Chequered Plate, Flats, Blank (Circle), Ring (Flange) |
Finish | Hot rolled plate, Cold rolled sheet, 2B, 2D, BA NO(8), SATIN |
ASTM A387 Grade 91 Sheet
SA 387 Gr 91 Plate
ASTM A387 Grade 91 Alloy Steel Sheet
SA 387 Gr 91 cl2 sheet
ASTM A387 Grade 91 CL1 plate
SA387 Grade 91 Plate
A387 Gr 91 Plate
ASME SA387 Grade 91 Class Alloy Steel Plate
C | Mn | P | S | Si | Cr | Mo | V |
0.08-0.12 | 0.30-0.60 | 0.020 | 0.012 | 0.20-0.50 | 8.00-9.50 | 0.85-1.05 | 0.18-0.25 |
Grade | A387 GR.91 | |||
A387 GR.91 | Thickness mm |
Yield Min Mpa |
Tensile Mpa |
Elongation Min % |
t≦50 | 415 | 585-760 | 18 | |
50<t≦200 | – | – | – |
BS | EN | ASTM/ASME | DIN |
- | 10CrMoVNb9-1 | A387-91-2 | - |
ASTM A387 Grade 91 Plate Thickness | ASTM A387 Grade 91 Plate Width | ASME SA387 Grade 91 Plate Length |
---|---|---|
4 Grade 91 | 2000 | 6000 |
5 Grade 91 | 2000 | 6000 |
6 Grade 91 | 2000 | 6000 |
6 Grade 91 | 2500 | 6000 |
8 Grade 91 | 2000 | 6000 |
8 Grade 91 | 2500 | 6000 |
10 Grade 91 | 2000 | 6000 |
12 Grade 91 | 2000 | 6000 |
15 Grade 91 | 2000 | 6000 |
16 Grade 91 | 2000 | 6000 |
20 Grade 91 | 2000 | 6000 |
25 Grade 91 | 2000 | 6000 |
32 Grade 91 | 2000 | 6000 |
40 Grade 91 | 2000 | 6000 |
50 Grade 91 | 2000 | 6000 |
60 Grade 91 | 1800 | 3400 |
Dammam -KSA, Philippines, Indonesia, Belgium | astm a387 grade 91 sheet |
Qatar, Europe, France, Thailand | Alloy Steel Plate ASTM A387 Gr 91 Cl 2 Sheet |
Czechia, Thailand, Germany, Malaysia | SA 387 Gr 91 Cl 2 Coil |
Malaysia, Bangladesh, USA, Finland | ASTM A387 Grade 91 Plate |
South Africa, Kuwait, Saudi Arabia (KSA), Brazil | ASTM A387 Grade 91 Class 1 Sheet |
Bahrain, Singapore, South Africa, Singapore | ASTM A387 Grade 91 Class 2 Chrome Moly Steel plates |
Philippines, UK, Australia, Nigeria | A387 Grade 91 Class 2 Hot Rolled Alloy Steel Plates |
Oman, Hong Kong, Malaysia, UAE | Grade 91 Chromium-Molybdenum Steel Plates |
Chile, Iran, Italy, Singapore | SA-387-Chromium-Molybdenum Alloy Steel Pressure Vessel Plates |
United Arab Emirates (UAE), Norway, Turkey, Malaysia | Alloy Steel Grade 91 Class 1 Sheets |
Netherlands, Russia, Malaysia, Dubai | SA387 Grade 91 Alloy Steel Plate |
Egypt, Mexico, Spain, UK | Alloy Steel A387 GR.2 CL.1 Chequered Plate |
United Kingdom -UK, Malaysia, Europe, UAE | ASTM A387 Grade 91 Class 2 Plate |
UK, Poland, Canada, Ellington -United States | A387 Grade 91 Class 2 Hot Rolled Structural Steel Plates |
Philippines, Canada, Malaysia, Singapore | ASTM A387 High Quality CL.1 GR.2 Plates |
Europe, Romania, Japan, Malaysia | Alloy Steel GR.2 CL.1 2B Finish Plate |
Sweden, Malaysia, Colombia, China | Alloy Steel ASTM A387 CR GR.2 CL.1 Plates |
Malaysia, Los Alamos -Mexico, Taiwan, Philippines | A387 Gr. 91 Cl. 1 AS Coils |
Singapore, NY 12203 (USA), South Korea, Malaysia | Alloy Steel ASME SA387 GR.2 CL.1 Flat Plates |