SA508 Gr2 Cl1

Alloy Steel

SA508 Gr2 Cl1

Nuclear RPV forging steel. (ASTM A508; equiv ASTM A508 Gr3 Cl1 / 16MND5). Nominal values—confirm mill certificate.

Chemical Composition (%)

C0.25
MN1.2
NI0.4
MO0.45

Mechanical Properties

Tensile:≥550 MPa;Yield:≥345 MPa

Chinese Standard

ASTM A508 SA508 Gr2 Cl1

Equivalent Standards

ASTM A508 Gr3 Cl1

Applications

核电站RPV锻件。,Forging

Available Forms

Low-alloy engineering steel with enhanced hardenability and strength from alloying elements. Molybdenum (≈0.525%) raises high-temperature strength and prevents temper embrittlement. Nickel (≈0.7%) increases toughness and impact strength at low temperature. Applied to gears, shafts, bolts, connecting rods, pressure parts and heavy forgings in automotive, energy and machinery sectors.

Uses

Typically normalized (880–920 °C, air cool) or carburized (900–930 °C) for case-hardening grades, then quenched and tempered at 150–200 °C.

Heat Treatment

Weldable with standard procedures; preheat may be needed for thick sections or higher-carbon/ alloy grades. Protect from decarburization during heating (controlled atmosphere or protective coating).

Precautions

16MND5

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