Alloy Steel Plates

Alloy Steel Plates are specialized steel products defined by having a total alloy content typically ranging from 1.5% to 5%. These added elements fundamentally change the steel’s properties, allowing it to perform reliably in extreme conditions.

Common alloying elements include manganese, silicon, chromium, nickel, molybdenum, and vanadium. A single alloy plate can contain varying amounts of several of these elements to achieve specific mechanical and thermal characteristics.

We deal in all Thickness is from 5mm-150mm as per client’s requirements

Alloy Steel Plate Grades

  • ASME SA 387 Grade 5 Class 1 & 2
  • ASME SA 387 Grade 11 Class 1 & 2
  • ASME SA 387 Grade 22 Class 1 & 2
  • 16M03
  • ASME -SA204 Gr. B/SA 204 B
  • ASME SA 387 Grade 9 Class 1 & 2
  • ASME SA 387 Grade 12 Class 1 & 2
  • ASME SA 387 Grade 91 Class 1 & 2
  • SA 204 GR A/B
  • ASTM A514 Grade Q

Specifications

Standard : ASTM A387, A204 / SA387, SA 204
Thickness : 5mm – 150mm
Width : 1000mm – 3000mm
Length : 3000mm – 12500mm
Impact tested : -52° C
Uses : used in the construction of buildings, bridges, ships, railway wagons, storage tanks, pressure vessels, pipes, large machines and furnaces, and other heavy structures

COUNTRY USA USA EUROPEAN GERMANY UK (BRITISH STANDARD) FRANCE RUSSIA
STANDARDS ASTM ASME EN 10028 DIN BS AFNOR 36206 GOST
GRADE A 387 5 SA 387 5 X12CrMo5 — — 15KH5M
GARDE A 387 9 SA 387 9 — — —
GRADE A 387 11 SA 387 11 13CrMoSi5-5 — 621B
GRADE A 387 12 SA 387 12 13CrMo4-5 13CrMo44 620B 15CD2.05 12KHM
GRADE A 387 22 SA 387 22 10/11CrMo9-10 10CrMo9-10 622-515B 12CD9-10 10KH2M
GRADE A 387 91 SA 387 91 10CrMoVNb9-1 —
A387/SA387 Grade 5 Grade 9 Grade 11 Grade 12 Grade 22
Carbon 0.15 max 0.15 max 0.04-0.17 0.04-0.17 0.04-0.15
Manganese 0.25-0.66 0.25-0.66 0.35-0.73 0.35-0.73 0.25-0.66
Phosphorous 0.035 0.030 0.035 0.035 0.035
Sulfur 0.030 0.030 0.035 0.035 0.035
Silicon 0.55 max 1.05 max 0.44-0.86 0.13-0.45 0.5 max
Chromium 3.9-6.1 7.9-10.1 0.94-1.56 0.74-1.21 1.88-2.62
Molybdenum 0.40-0.7 0.85-1.15 0.40-0.7 0.4-0.65 0.85-1.15
Specification Chemical Max
  C Max Min Max Si Max S Max P Max Cr Max Mo Max Ni Max Cu Max
ASTM A 204 Gr-B 0.20 0.90 0.15 0.40 0.04 0.035 — 0.45 0.60 — —
16M03 0.12 0.20 0.40 0.90 0.35 0.025 0.030 0.30 0.25 0.35 0.30 —
Grade A 387 Grade 5 A 387 Grade 9 A 387 Grade 11 A 387 Grade 12 A 387 Grade 22
Class 1 Class 2 Class 1 Class 2 Class 1 Class 2 Class 1 Class 2 Class 1 Class 2
Tensile Strength (ksi) 60-85 75-100 60-85 75-100 60-85 70-90 50-80 60-85 60-85 75-100
Tensile Strength (MPa) 415-585 515-690 415-585 515-690 415-585 485-620 380-550 415-585 415-585 515-690
Yield Strength (ksi) 30 45 30 45 35 45 33 40 30 45
Yield Strength (MPa) 205 310 205 310 240 310 230 275 205 310
Elongation in 200mm (%) 19 18 18 19
Elongation in 50mm (%) 18 18 18 18 22 22 22 22 18 18
Reduction of area in % 45 45 45 45 45 45
Specification Mechanical MPA, min
  Tensile Yield % EL Bend
ASTM A 204 Gr-B 485 620 275 21 17 2T
16 Mo3 440 590 275 24 — Impact : +20C / 3
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