GB/T 1299-2014/AISI/SAE L3/DIN 1.2067/100Cr6/9XC

Chemical Composition

• The main element content is as follows (mass fraction):
• Carbon (C): 0.85% to 0.95%
• Silicon (Si): 1.00% to 1.60%
• Manganese (Mn): 0.30% to 0.60%
• Chromium (Cr): 0.95% to 1.25%
• Sulfur (S), phosphorus (P): both ≤ 0.030%
• Nickel (Ni), copper (Cu): trace residues are allowed (≤ 0.25% and ≤ 0.30%)

Physical Property 

• High hardenability:

The depth of the hardened layer during oil quenching can reach 40-50mm, suitable for large section workpieces.

• High hardness and wear resistance:

Quenching hardness ≥ 62HRC, red hardness temperature range 250-320 ℃.

• Tempering stability:

Dispersed carbides precipitate during tempering at 500-600 ℃, exhibiting a secondary hardening effect.

• Heat treatment deformation is small:

The incubation period in the medium temperature transition zone is long, suitable for graded quenching or isothermal quenching processes.

Main PurposeTool Manufacturing:

Used for low-speed cutting tools (such as drill bits, reamers, taps) and molds with complex shapes and high wear resistance requirements (such as stamping dies, plastic molds).

Structural component application:

Suitable for components such as ships, vehicles, machine tools, pressure vessels, etc. that require high strength and wear resistance.Special process: commonly used for cold rolling rolls, straightening rolls, and slender rods, balancing hardness and toughness.