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Alloy Steel Plates and Sheet

ASTM A387 is a specification which takes into account alloy steel components that are killed as well as thermally treated. Usually killed Alloy Steel Coil is completely devoid of oxygen, which is why there is no evolution of gas during solidification, which in turn leads to freedom from gas porosities, or in other words a leak-free component. The steel specimens, which in this case is the ASTM A387 Steel Plate are required to undergo heat analysis and product analysis, in addition to conforming to the chemical requirements of this specification. Alloying any steel grade is a practise commonly use all across the world, in order to produce much better and smarter alloys in order to ease the function of day to day activities. This being said, there are 2 types of alloy steel grades, i.e. - low alloy and high alloyed steel.

Alloy Steel Plates and Sheet

Since the alloying content of Low Alloy Steel Plates ranges between 1.5% to 5% of its total weight, which is relatively lower as compared to high alloy steel which can range anywhere between 6% to 50%. On many occasions, the Alloy Steel Plates finds use in demanding operations such as the turbine blades of jet engines, or in nuclear reactors, which is why most alloy steels have a corresponding heat treatment in addition to having alloyants such as chromium, molybdenum, manganese, nickel, vanadium, silicon, as well as boron. Moreover, the heat treatment performed on the Alloy Steel Sheet works to increase properties such as hardenability, hardness, tensile strength, toughness as well as wear resistance and corrosion resistance.

Specification list of Alloy Steel Plates

Standard 15MO3, ASTM A387 / ASME SA387 , 204 DIN 17175 , 16MO3
Range 5 mm To 200 mm thick in 1000 mm TO 2500 mm width & 2500 mm to 12500 mm Length
Grade F9 , F2, F11 , F92 , F12 , F5 , F22 , F91 , A & B , CLASS 1 & 2
HSS in Grade M3, M35, M2, M42 Etc.
Form Shim Sheet, Rolls, Foils, Chequered Plate, Perforated Sheet,
Finish 2B, 2D, HR,CR, BA NO(8), SATIN (Met with Plastic Coated), Hot rolled plate (HR) Cold rolled sheet (CR)
Other Services Anodising, Electroplating, Heat Treatment, Polish, Anneling, Rolling, Cutting, Bending, Pickling, Forging, Minor Fabrication Etc.

Know Before You Purchase

Alloy steel plate normally contains 0.20 to 0.55% carbon and these are almost always quenched and tempered for high strength and toughness. There are certain alloy steel grades which contains about 9% chromium, which makes them suitable for use at elevated temperatures.

Low Alloy Steel Plates Dimensions

Plate Surface finish Gauge (in) Width (max in)
2B – Cold rolled, heat treated, pickled, skin passed Plate 10–24 72*
2D – Cold rolled, heat treated, pickled plate 12–24 60
BA Mexinox only 18–28 48
Polished plate (not brushed) 11–24 60
Temper rolled plate Mexinox only 13–29 48

Alloy Steel Sheet Composition Standard

C Mn P S SI Cr Mo
Grade 5 0.15 max 0.3 – 0.6 0.035 0.03 0.5 max 4.00 – 6.00 0.45 – 0.65
Grade 9 0.15 max 0.30 – 0.6 0.03 0.03 1.0 max 8.0 – 10.0 0.9 – 1.1
Grade 11 0.05 – 0.17 0.4 – 0.65 0.035 0.035 0.5 – 0.80 1.0 – 1.5 0.45 – 0.65
Grade 12 0.05 – 0.17 0.4 – 0.65 0.035 0.035 0.15 – 0.4 0.8 – 1.15 0.45 – 0.6
Grade 22 0.05 – 0.15 0.3 – 0.6 0.035 0.035 0.5 max 2.0 – 2.5 0.9 – 1.1

Testing Facilities of ASME SA 387 Steel Plate

  • Positive material identifications
  • Chemical composition analysis
  • Micro/ macro test
  • Ultrasonic test
  • Radiography
  • Pitting corrosion test
  • Tensile test
  • Hardness test
  • Hydro testing
  • Thermal performance test
  • Mechanical properties testing
  • Flattening test
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