20NICR14 performance and the use of structural steel 20nicr14 steel hardenability of the steel is good, to get a uniform intensity over a large cross-section range. After quenching or quenching and tempering, with good mechanical properties. Good machinability, weldability and cold plastic deformation medium. There sensitivity of the formation of white spots, tempering tendency to temper brittleness. Quenched to martensite hardness and a half, when oil quenching can hardenability Φ50 ~ 70mm, good machinability, weldability medium. Used for the manufacture of high load conditions, working gears, shafts, worm and screws, studs, pins, etc. Carbon chemical composition C: 0.14 ~ 0.20 silicon Si≤0.40 chromium Cr: 0.60 ~ 1.00 Manganese Mn: 0.40 ~ 0.70 Ni Ni: 3.00 ~ 3.50 Mechanical Properties Tensile strength σb (MPa): ≥980 Conditions yield strength σ0.2 (MPa ): ≥835 Elongation δ5 (%): ≥10 section shrinkage ψ (%): ≥55 impact toughness αku (J / cm2): ≥98 Hardness: 341 ~ 292HB heat treatment specifications Specification: 820 ~ 840 ℃ oil or warm water quench 400 ~ 500 ℃ tempering, oil or water. Microstructure 1) quenching: sorbite; 2) quenching, tempering after carburizing: integrity, strength and quality of tempered martensite Ltd. Suzhou Gabriel million recognized by the industry. Welcome friends to visit, guidance and business negotiation. Tel 0512-65914015 Fax 0512-69233015 13270975042 Mr.Huang