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A470 Grade B Class 5
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Turbine rotors and shafts ASTM A470 Grade B Round bar, Flat bar, Forgings Straightening, 100% Ultrasonic test Cold working, Polishing, Centerless grinding.

TECHNICAL SPECIFICATION - ASTM A470 Grade B Class 5

TECHNICAL SPECIFICATION: ASTM A470 - 2015

OFFICIAL TEST CERTIFICATE: issued by TUV - SGS

MATERIAL TYPE: Ni - Mo - V steel
CHEMICAL COMPOSITION (mass weight - %)
Carbon, C (％): 0.22 ~ 0.30
Manganese, Mn (％): 0.20 ~ 0.60
Phosphorus, P (％) ≤: 0.012
Sulfur, S (％) ≤: 0.012

Silicon, Si (％): ≤ 0.30

Nickel, Ni (%): 3.20 ~ 3.70

Chromium, Cr (%): ≤ 0.75

Molybdenum, Mo (%): 0.40 ~ 0.60

Vanadium, V (%): 0.04 ~ 0.12

Aluminum, Al (%): ≤ 0.015

MECHANICAL PROPERTIES UNDER ROOM TEMPERATURE
Grade B Class 5

Tensile strength,σb/≥ MPa: 620 ~ 760
Yield strength, σ0.2/≥ MPa: 485
Elongation, δ ≥(％): 20.0
Reduction of area, ф ≥ (％): 50.0
Impact, AK (J/cm2): 68

MELTING PROCESS

The steel shall be made by the basic electric-furnace (EF + LF + VD ) or Vacuum induction melting (VIM) process. Subsequent secondary melting of the steel by ESR or VAR.

AVAILABLE FORMS AND SHAPES
Round bar & Disc (diameter): 5.5 mm to 650mm
Square bar / Flat bar: 10mm to 500mm
Steel strip: T0.20 ~ 3mm X W10 ~ 2000mm X Coil
Forging piece: stepped shafts, other different shapes based on OEM.

TECHNICAL SALES ASSISTANCE
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