24 July 2021 Free-Cutting Steel Bar
10S20 Free Cutting Steel Bar
10S20 (1.0726) is an S-P composite low-carbon free cutting steel, is the existing cutting steel in the largest amount of phosphorus. 10S20 (1.0726) 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, often replacing 15 parts of steel to produce various parts such as bolts, nuts, Pins, shafts, fittings and spark plugs.
Chemical composition:
- 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
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 or cold-drawn condition, delivery status should be indicated in the contract.