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ASTM A387 GRADE 5 Class 1


A high quality ASTM A387 GRADE 5 Class 1 or chrome molybdenum alloy steel plate intended specifically for use in weldable carbon steel pressure vessels at elevated temperatures. Added molybdenum gives the material greater temperature tensile strength and the chromium provides improved corrosion resistance.

Equivalents

BS EN ASME DIN
... ... A387-5-1 ...

Specifications ASTM A387 Grade 5 Alloy Steel Plates

Chromium & Molybdenum content (according to the ASME specification)
Designation Nominal Chromium
Content (%)
Nominal Molybdenum
Content (%)
A387 Grade 5 5.00% 0.50%

Tensile Requirements for ASTM A387 Grade 5 Alloy Steel Plates Class 1 Plates

Designation: Requirement: Grade 5

A387 Grade 5

Tensile strength, ksi [MPA] 75 to 100 [515 to 690]
Yield strength, min, ksi [MPa]/(0.2% offset) 45 [310]
Elongation in 8 in. [200mm], min % ...
Elongation in 2 in. [50mm], min, % 18
Reduction of area, min % 45 (measured on round specimen)
40 (measured on flat specimen)

Chemical Requirements for ASTM A387 Grade 5 Alloy Steel Plates

Element Chemical Composition (%)
A 387 Grade 5
Carbon: Heat Analysis: 0.15 max
Product Analysis: 0.15 max
Manganese: Heat Analysis: 0.30 - 0.60
Product Analysis: 0.25 - 0.66
Phosphorus: Heat Analysis: 0.035
Product Analysis: 0.035
Sulphur (max): Heat Analysis: 0.030
Product Analysis: 0.030
Silicon: Heat Analysis: 0.50 max
Product Analysis: 0.55 max
Chromium: Heat Analysis: 4.00 - 6.00
Product Analysis: 3.90 - 6.10
Molybdenum: Heat Analysis: 0.45 - 0.65
Product Analysis: 0.40 - 0.70
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