Q345 Solid Square Carbon Steel Bar

1.Application for square bars

1): Can be used in many fields such as building, automobile, shipbuilding, petrochemical, machinery,

medicine, food, electric power, energy, space, building and decoration, etc.

2): Can be made into mould template, mortise pin, column

3): This kind of steel have good mechanical property, is widely used in structural parts which

may support stress alternation, especially made into some connecting rods, bolts, wheel gear...

 4): This kind of steel is the most common blanks and materials of shaft parts.

 










2.Sizes:

size:10*10-130*130(mm)

length:3-12m (canbe customized)

 

Size Tolerance:

Length tolerance: +50mm/-0mm

Straightness: max 3mm/m

 

3.Delievery condition

1.Both end of each bar must be cut.

2.Ladle furnanced and vacuum de-gassed

3.Show heat No. on each bar

4.Surface condition the surface of the hot rolled square bar shall befree cracks, scar and wrinkles

that affect the use of the billets. In case there is the above-mentioned defect, it shall be remove.

5.The mill test certificate shall show the chemical composition, and it is guaranteed that the

chemical composition shall be within the limit stipulated in the contract

 

 

4.Chemical composition

Grade	C	Si	Mn	P	S	Cr	Ni
1020	0.17	0.17	0.35	≤0.03	≤0.03	≤0.25	≤0.30
	0.23	0.37	0.65
1045	0.42	0.17	0.5	≤0.03	≤0.03	≤0.25	≤0.30
	0.5	0.37	0.8