10S20 Free Cutting Hot Rolled Bars

The material no. of 10S20 special steel is 1.0726. 10S20 is an S-P composite low-carbon free cutting steel, and also is the existing cutting steel in the largest amount of phosphorus. It is available in hot rolled steel round bars and flat bars. 

Carbon C: 0.07 to 0.13

Silicon Si: ≤0.40

Mn: 0.70 to 1.10

Sulfur S: 0.15 to 0.25

Phosphorus P: ≤0.06

10S20 Free Cutting Hot Rolled Bars Mechanical properties:

Tensile strength σb (MPa): (hot rolling) 390 ~ 540; 

(cold drawn) steel thickness or diameter 8 ~ 20: 530 ~ 755;> 20 ~ 30: 510 ~ 735;> 30: 490 ~ 685

Elongation δ5 (%): (hot rolling) ≥ 22; (cold rolling) ≥ 7.0

Section shrinkage ψ (%): (hot rolling) ≥36

Hardness: (hot rolling) ≤ 170HB; (cold drawn) 152 ~ 217HB

Delivery status: delivery in hot rolled condition, delivery status should be indicated in the contract.

10S20 Special Steel Features and Scope of Application:

The mechanical properties of steel have obvious anisotropy. The longitudinal mechanical properties of cold drawn steel are close to that of cold drawn 15 steel. 10S20 free cutting steel often replaces 15 parts of steel to produce various parts such as bolts, nuts, Pins, shafts, fittings and spark plugs.