T10 Overview 
 T10 Carbon tool steel, strength and high abrasion resistance than T8 and T9, but the hot hardness is low, not high hardenability and hardening deformation, small grains, when heated in the hardening is not easy to overheat, can maintain fine grain organization; after quenching of steel in excess of undissolved carbide, so high abrasion resistance, for the manufacture of a sharp knife and a little toughness tool. Less suitable for the manufacture of cutting conditions, higher abrasion resistance and is not sudden and severe shock and vibration and requires a certain toughness and a variety of tools with sharp cutting edges, can also be used without a large impact on the wear-resistant parts . 
 T10 Carbon Tool Steel picture 
 Features: T10 is the most common form of carbon tool steel, toughness, moderate, low production costs, heat-treated to achieve hardness above 60HRC, however, the hardenability of steel is low, and poor heat resistance (250 ℃), in quenching is not easy to overheat, remains fine-grained. Acceptable toughness, strength and wear resistance higher than T7-T9, but the hot rigid low hardenability is still not high, quenching deformation. Scope: This steel used widely, for the manufacture of cutting conditions are poor, higher abrasion resistance and is not a sudden and severe shock and vibration and requires a certain toughness and a sharp edge of a variety of tools, such as turning , planer, drill, tap, reaming tools, screw die, mill hand saw blade, you can also make cold heading die, dies, drawing dies, cold extrusion die with aluminum, paper cutting mold, plastic mold , small size and punching die trimming die cold, low-precision measuring tools and simple shapes (such as card board, etc.), can also be used from a larger impact on the wear parts. ● Delivery status: Delivery of steel in the annealed condition. By mutual agreement, can not annealed state delivery. 
 Physical properties 
 Chemical composition: Carbon C: 0.95 ~ 1.04 Si Si: ≤ 0.35 Manganese Mn: ≤ 0.40 S S: ≤ 0.020 P P: ≤ 0.030 Chromium Cr: to allow the residual content of ≤ 0.25, ≤ 0.10 (when the manufacture of lead wire quenching bath) Ni-Ni : allow the residual content of ≤ 0.20, ≤ 0.12 (when the manufacture of lead-bath quenching wire) copper Cu: to allow the residual content of ≤ 0.30, ≤ 0.20 (when the manufacture of lead-bath hardening steel) Note: to allow the residual content of Cr + Ni + Cu ≤ 0.40 (manufacturing wire when the lead bath quenching) the mechanical properties of hardness: annealing, ≤ 197HB, indentation diameter ≥ 4.30mm; quenching, ≥ 62HRC heat treatment specifications: the sample quenching 760 ~ 780 ℃, water quench hardening steel T10 recommended specifications are shown in Table 2 - 22-7, cold treatment in Table 2-22-8, quenching the curve shown in Figure 2-22-7 ~ Figure 2-22-13. T10 steel standard program recommended quenching heating temperature / ℃ cooling Hardness (HRC) 
 Coolant coolant temperature / ℃ to 20 ℃ cooling continues 
 Ⅰ 
 Ⅱ 
 Ⅲ 770 ~ 790 water 
 5% salt solution 
 5% to 10% alkali solution 20 to 40 
 20 ~ 40 
 20 to 40 至 200 ~ 250 ℃ 
 To 200 ~ 250 ℃ 
 To 200 ~ 250 ℃ oil cooling 
 Oil cooling 
 Oil-cooling 62 ~ 64 
 62 ~ 65 
 62 ~ 64 
 Ⅳ 
 Ⅴ 
 Ⅵ 790 ~ 810 spindle oil or transformer oil 
 Molten nitrate 
 Melting soda plus 4% to 6% water 20 - 40 
 150 ~ 180 
 150 ~ 180 至 20 ~ 40 ℃ 
 3 ~ 5min 
 3 ~ 5min air-cooled 
 Air-cooled 62 to 64 
 62 ~ 64 
 62 ~ 64 
 Note: 1. Ⅲ program is used to prevent the formation of quenching soft point; 2 solution Ⅳ and Ⅴ for the diameter or thickness of less than 6 ~ 8min workpiece; 3 program Ⅵ for diameter or thickness of the workpiece 10 ~ 20mm. Table 2-22-8 T10 steel cold treatment program quenching cooling temperature / ℃ 

 Use hardness increment (△ HRC) 
 Ⅰ ~ Ⅵ -50 workpiece size and stability of high-precision 1-2 
 Note: After the cold treatment in less than 1h for quenching.