Chinese steel grade Q245R

Grade Q245R is a Chinese steel grade material under GB 713 standard. It is a kind of carbon steel and low-alloy high-strength steel. Q245R material is featured by specified elevated temperature properties for pressure vessels. Q245R steel plate density is 7.85g/cm3.

Q245R Steel Plates Application

The Q245R steel plate belongs to the boiler vessel plate and is used to manufacture various boilers and important accessories. Because the boiler steel plate is working under high temperature at medium temperature (below 350 °C), in addition to high pressure, boilers are also subjected to impact, fatigue load and water and gas corrosion. It requires a certain strength and good welding and cold bending performance.

Grade Q245R Steel Plate Parameters

Chemical Requirements (%, heat analysis)

C max.	Si max.	Mn	P max.	S max.	Alt (min.)
0.20	0.35	0.50-1.00	0.025	0.015	0.020

Mechanical Properties of Q245R Steel

Thickness (mm)
Q245R	> 3 ≤ 16	> 16 ≤ 36	> 36 ≤ 60	>60 ≤ 100	>100
Yield strength (≥Mpa)	245	235	225	205	185
Tensile strength (Mpa)	400-520			390-510	380-50

Grade Q245R Steel Equivalent: ASTM Standard Equivalent

Grade	Standard	ASTM
Q245R	GB 713	A435,A577,A578

What does Q245R Stand for?

245: indicates the steel min. yield strength value.
Q: the capital letter of the yield Chinese characters “Q”(Qu)
R: P shows the steel application of pressure vessel (Rong)
 

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