SNCM21 alloy steel is a carburized alloy structural steel with the following characteristics: high strength and hardness: SNCM21 alloy steel has high strength and hardness, and can withstand high load and resistance to deformation. This makes it very effective in the manufacture of mechanical parts and tools that require high-strength materials.
Chemical Composition: Carbon C: 042～0.49
Silicon si: 017～0.37
Manganese mn: 050～0.80
Sulfur S: permissible residual content 0025
Phosphorus p: permissible residual content 0025
Chromium cr: 080～1.10
Nickel ni:130～1.80
Copper Cu: Allowable residual content 0025
Vanadium v: 010～0.20
Molybdenum mo: 020～0.30
Mechanical Properties: Tensile Strength b (MPa): 1470(150).
Yield Strength s (MPa): 1325(135).
Elongation δ5 (%7
Section shrinkage 35
Impact power AKV (J): 31
Impact toughness value kv (j cm2): 39(4).
Hardness : 269HB
Excellent wear resistance: Due to its special alloy composition and heat treatment process, SNCM21 alloy steel has excellent wear resistance. It is able to maintain stable surface hardness in an environment subject to friction and wear, extending the service life of parts.
High Fatigue Strength: SNCM21 alloy steel is properly heat-treated to obtain excellent fatigue strength, which is able to maintain reliability under long-term use and high frequency loading.
Based on the above characteristics, SNCM21 alloy steel is mainly used to manufacture various high-strength and wear-resistant mechanical parts and tools. Common applications include bearings, gears, hubs, hammers, etc. These parts and tools require stability and durability under heavy loads and in harsh operating environments.