Executive Standard: ASTM A29/A29M-04
● Features and application:
Low mechanical strength, ductility, toughness and cold conditions easily molded, easy cutting, welding performance, to improve the surface hardness can be carburized and cyanide treatment. Not used in the manufacture of high strength welded, cold stamping, forging and carburizing parts such as bolts, washers, partitions, shell, etc..
● Chemical Composition:
Carbon C: 0.08 ~ 0.13
Si Si: 0.15 ~ 0.35
Manganese Mn: 0.30 ~ 0.60
Sulfur S: ≤ 0.050
Phosphorus P: ≤ 0.040
Chromium Cr: ≤ 0.20
Ni-Ni: ≤ 0.25
Copper Cu: ≤ 0.25
● Mechanical Properties:
Tensile strength σb (MPa): ≥ 335 (34)
Yield strength σs (MPa): ≥ 205 (21)
Elongation δ5 (%): ≥ 31
Reduction of area ψ (%): ≥ 55
Hardness: no heat treatment, ≤ 137HB
Sample Size: Sample size is 25mm
● Heat treatment and microstructure specifications:
Heat treatment specifications: normalizing, 930 ℃.
Microstructure: ferrite + pearlite.
● Delivery status: no heat treatment or heat treatment (annealing, normalizing or tempering) the status of delivery. Demands heat treatment delivery should be specified in the contract, not indicated by no heat treatment delivery.
