AISI 4340 Alloy Steel , EN24 817M40 DIN1.6582 34CrNiMo6 QT Alloy Steel Round Bar

AISI 4340 Alloy Steel , EN24 817M40 DIN1.6582 34CrNiMo6 QT Alloy Steel Round Bar

Application

4340 Alloy steel mainly used in mechanical parts, automobile parts, cement plants, power plants, mobile cranes and earth-moving equipment, aerospace industry for structural parts of flaps assembly, fuselage and landing gear, propeller plane axles, etc.

Quality Standard

-ASTM A29 Standard for Steel Bars, Spring steel, General Requirements.

-BS 970 Part 3 Bright bars-mechanical and allied engineering purposes for general engineering purposes.

Steel Grades

ASTM                            EN                           DIN                          BS                            JIS

4340                      34CrNiMo6                 1.6582               EN24/817M40         SNCM439

Chemical Composition(%)

Heat Treatment

4340 alloy steel is heat treated at 830°C (1525°F) followed by quenching in oil.

Annealing
4340 alloy steel is annealed at 844°C (1550°F) followed by cooling the furnace.

Tempering
4340 alloy steel should be in the heat treated or normalized and heat treated condition before tempering. Tempering temperatures depend upon the desired strength level.

Hardening
4340 alloy steel can be hardened by cold working or heat treatment.

Capacity

3,000 ton per month.

Test

Chemical analysis, Mechnical analysis, Ultrasonic testing, Metallographic, Surface quality and dimension report.

Package

Each bundle of max 3,000kg with several steel strips, Two tags on each bundle, Wrapped in waterproof paper, PVC sleeve, and sackcloth with several steel strips.

Mill’s Test Certificate

EN 10204/3.1 with all relevant data reg. chem. composition, mech. properties and results of testing.