DIN 1.4980 Round 1.4980 Flat 1.4980 Forged Bars 1.4980 Squar

Product Description

DIN 1.4980 Technical Datasheet (Round, Flat, Forged, & Square Bars)

DIN 1.4980 (chemically designated as X6NiCrTiMoVB25-15-2 under EN 10269 and EN 10302) is a premium iron-base, precipitation-hardening austenitic superalloy. It is the European direct equivalent to UNS S66286 (Alloy A-286) and ASTM A638 Grade 660.

By undergoing a solution treatment followed by precipitation aging, it forms a strengthening gamma prime ($\gamma^\prime$) intermetallic phase. This microstructure provides high tensile strength, long-term creep resistance, and excellent oxidation resistance at continuous operating temperatures up to 700°C (1292°F).

Structural Comparison of Form Factors

The mechanical behavior, grain orientation, and typical application boundaries of DIN 1.4980 shift significantly based on its geometric profile and manufacturing method:

Profile Specifications

1. DIN 1.4980 Round Bars

• Engineering Profile: Features uniform radial grain deformation. Bright drawn variants offer exceptionally tight dimensional tolerances (such as h9 or h11).

• Common Applications: High-temperature fasteners, engine cylinder studs, aerospace bolts, and gas turbine downstream components. Often specified alongside DIN 2510 standards for resilient bolted connections.

2. DIN 1.4980 Flat Bars

• Engineering Profile: Produced via rolling or shearing from plate stock. It exhibits mechanical anisotropy, meaning its transverse ductility is slightly lower than its longitudinal strength.

• Common Applications: High-temperature structural brackets, aerospace exhaust frames, furnace guide rails, and linear reinforcement plates.

3. DIN 1.4980 Square Bars

• Engineering Profile: Features sharp 90-degree corners with balanced cross-sectional area distribution. It retains dimensional stability well during precipitation aging treatments.

• Common Applications: Heavy-duty machine keys, high-temperature torque-transmission bars, slide blocks for industrial vacuum furnaces, and specialized aerospace framing components.

4. DIN 1.4980 Forged Bars

• Engineering Profile: Created via heavy open-die hydraulic pressing. This process yields the highest structural integrity and fatigue resistance of all forms, though it requires a higher machining allowance to remove the superficial oxide layer.

• Common Applications: Large-diameter turbine rotors, high-pressure pump shafts, critical valve stems, and thick-walled flanges operating under severe cyclic thermal stress.