Low Alloy Steel Plates contains less alloy elements belows 3.5% of total elements.Intending to add some alloy elements on the carbon steel basic for improving the steel performance. Low Alloy Steel Plates Mainly used in bridge building, shipbuilding, vehicles, boilers, pressure vessels, oil pipelines, large steel structures, etc.
Low Alloy Steel Plates contains less alloy elements belows 3.5% of total elements.Intending to add some alloy elements on the carbon steel basic for improving the steel performance.
Available range : SA 387 Grade Plate & Chrome Moly Steel Plate
Features : Corrosion resistant surface, Excellent durability, High strength, Excellent tensile strength
Application : Used in structural, mechanical & general engineering purposes.
Thickness | Yield KSI | Tensile KSI | % Elongation. Min | |
8" | 2" | |||
Thru 4" | 50 min | 70 min | 16 | 19 |
>4"thru5" | 46 min | 67 min | - | 19 |
>5"thru8" | 42 min | 63 min | - | 19 |
C | P | S | Mn | Ni | Cr | Mo | V | Cu | Cbj | Si | |
Grade A | .19 | .04 | .05 | .80/1.25 | .40 | .40/.65 | - | .02/.10 | .25/.40 | - | .30/.65 |
Grade B | .20 | .04 | .05 | .75/1.35 | .50 | .40/.70 | - | .01/.10 | .20/.40 | - | .15/.50 |
Grade C | .15 | .04 | .05 | .80/1.35 | .25/50 | .30/.50 | - | .01/.10 | .20/.50 | - | .15/.40 |
Grade K | .17 | .04 | .05 | .50/1.20 | .40 | .40/.70 | .10 | - | .30/.50 | .005/.05 | .25/.50 |
ASTM A 387, ASME SA 387, is one of our most popular products. It is a low alloy pressure vessel quality steel for high temperatures. We have a wide range of plate sizes available and thicknesses range from 6 - 100mm. ASME SA387 standard plates are used by the world's leading fabricators who in turn, supply primarily to the oil and petrochemical industry. Applications for ASME SA387 include pressurised vessels, industrial boilers, heat exchangers and pipework.
Plates are available under these specifications in several grades each having different nominal Chromium (Cr) and Molybdenum (Mo) contents as follows :
Grade | Nominal Cr Content (%) | Nominal Mo Content (%) |
2 | 0.5 | 0.5 |
12 | 1 | 0.5 |
11 | 1.25 | 0.5 |
22, 22L | 2.25 | 1 |
21, 21L | 3 | 1 |
5 | 5 | 0.5 |
9, 91 | 9 | 1 |
Grade | C | S | P | Mn | Cr | Mo | Si | V |
Gr. 2 | 0.05-0.21 | 0.025 | 0.025 | 0.55-0.80 | 0.50-0.80 | 0.45-0.60 | 0.15-0.40 | - |
Gr. 5 | 0.15 | 0.025 | 0.025 | 0.30-0.60 | 4.00-6.00 | 0.45-0.65 | 0.5 | - |
Gr. 9 | 0.15 | 0.025 | 0.025 | 0.30-0.60 | 8.00-10.00 | 0.90-1.10 | 1.00 | 0.04 |
Gr. 11 | 0.05-0.17 | 0.025 | 0.025 | 0.40-0.65 | 1.00-1.50 | 0.45-0.65 | 0.50-0.80 | - |
Gr. 12 | 0.05-0.17 | 0.025 | 0.025 | 0.40-0.65 | 0.80-1.15 | 0.45-0.60 | 0.15-0.40 | - |
Gr. 21 | 0.05-0.15 | 0.025 | 0.025 | 0.30-0.60 | 2.75-3.25 | 0.90-1.10 | 0.5 | - |
Gr. 21L | 0.10 | 0.025 | 0.025 | 0.30-0.60 | 2.75-3.25 | 0.90-1.10 | 0.5 | - |
Gr. 22 | 0.05-0.15 | 0.025 | 0.025 | 0.30-0.60 | 2.00-2.50 | 0.90-1.10 | 0.5 | - |
Gr. 22L | 0.1 | 0.025 | 0.025 | 0.30-0.60 | 2.00-2.50 | 0.90-1.10 | 0.50 | - |
Gr. 91* | 0.08-0.12 | 0.010 | 0.020 | 0.30-0.60 | 8.00-9.50 | 0.85-1.05 | 0.20-0.50 | 0.18-0.25 |
Class 1 Plates�\
Grade | Tensile (MPa) | Yield (MPa) | Elong. (50mm) | Reduc'n of Area* |
2, 12 | 380 - 550 | 230 min | 22% min | - |
11 | 415 - 585 | 240 min | 22% min | - |
22, 21, 5, 9 | 415 - 585 | 205 min | 18% min | 40% min |
21L, 22L | 415 - 585 | 205 min | 18% min | 40% min |
Class 2 Plates
Grade | Tensile (MPa) | Yield (MPa) | Elong. (50 mm) | Reduc'n of Area* |
2 | 485 - 620 | 310 min | 22% min | - |
11 | 515 - 690 | 310 min | 22% min | - |
12 | 450 - 585 | 275 min | 22% min | - |
22, 21, 5, 9 | 515 - 690 | 310 min | 18% min | 40% min |
91 | 585 - 760 | 415 min | 18% min | - |
Chrome Moly Steel Plates is manufactured using chromium and molybdenum elements. Chome Moly steel plate, formally known as Chrome Molybdenum, is usually sold as ASTM A387 or ASME SA387. A387 is alloy steel plate that is designed for use in pressure vessels, process vessels and boilers operating at high temperatures.
The Chrome Moly Steel Plates are highly effective in Salt Water applications.
ASTM A387 Grade 5 Class 2, Grade 9 Class 2, Grade 11 Class 2, Grade 12 Class 2, Grade 22 Class 2, Grade 91 Class 2.
ASME SA387 Grade 5 Class 2, Grade 9 Class 2, Grade 11 Class 2, Grade 12 Class 2, Grade 22 Class 2, Grade 91 Class 2.
EN 10028: 16Mo3, 13CrMo45, 10CrMo010
BS 1501: 620B, 621B, 622B
Boilers
Pressure Vessels
Heat Exchangers
Flanges
Ducting
Pipe Supports
Valves
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