The trillion Novo Trading Co., Ltd. 

 Material: alloy structural steel 

 Grade: 30CrMnSiA 

 Standard: GB / T 3077-1988 

 Features Applications: 30CrMnSiA the case of carbon quenched and tempered steel, high strength, poor welding performance. 3 

 0CrMnSiA tone quality, high strength and toughness, hardenability or. After quenching the material to do the wheel shafts, gears, sprockets. 

 30CrMnSiA has good workability, processing deformation tiny, anti-fatigue performance is very good. 

 For shafts, piston type spare parts. For cars, planes, a variety of special wear-resistant parts. 

 Chemical composition: 

 Carbon C: 0.28 to 0.34 

 Silicon Si: 0.90 ~~ 1.20 

 Mn Mn: 0.80 ~~ 1.10 

 Sulfur S: allow the residual content of ≤ 0.025 

 Phosphorus P: allow the residual content of ≤ 0.025 

 Chromium Cr: 0.80 ~ 1.10 

 Ni: to allow the residual content of ≤ 0.030 

 Cu: to allow the residual content of ≤ 0.025 

 Mechanical properties: 

 Tensile strength σb (MPa): ≥ 1080 (110) 

 Yield strength σs (MPa): ≥ 835 (85) 

 Elongation δ5 (%): ≥ 10 30 

 CrMnSiA alloy structural steel 

 Section shrinkage ψ (%): ≥ 45 

 Impact energy Akv (J): ≥ 39 

 Impact toughness values ??αkv (J / cm?): ≥ 49 (5) 

 Hardness: ≤ 229HB 

 Sample size: sample blank size of 25mm 

 Heat treatment and microstructure: 

 Standardized heat treatment: hardening 880 ° C, cold oil; tempering 540 ° C, water-cooled, oil cooled. 

 Delivery status: to heat treatment (normalizing, annealing, or high-temperature tempering) or heat treatment state of delivery, the delivery status should be indicated in the contract. 

 High strength, but in the case of carbon quenched and tempered steel, have greater hardenability, welding performance is poor. 

 High strength and toughness of the material after quenching and tempering, hardenability or. After quenching the material to do the wheel shafts, gears, sprockets. If you do the cutting tool, roughing tool shape. Quenching and tempering. Carbide milling cutter blade, polishing machine polishing. Surface roughness of 3.2 should be no problem. The material color is gray, galvanized not just to a beautiful, can also be rust-proof.