Q690D high Strength Structural Steel Q690D Low-alloy Carbon Steel

Description: Grade Q690D carbon steel is a high-strength welded structural steel material. Q690D steel can be called low temperature resistant high strength steel with a yield strength of 690Mpa. Among them, Q represents the yield strength, 690 represents the yield st...

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Q690D Steel Description

Grade Q690D carbon steel is a high-strength welded structural steel material. Q690D steel can be called low temperature resistant high strength steel with a yield strength of 690Mpa. Among them, Q represents the yield strength, 690 represents the yield strength value, and D represents the grade of the steel plate; the common steel quality grades are A, B, C, D, and E, respectively. The impact of D grade steel plate is -20°C. The yield strength is above 690MPa, the tensile strength is between 770MPa and 940MPa, and the impact test has been done at minus 20 degrees. Due to the high yield tensile strength of Q690D low alloy steel, the thickness is generally between 6-100mm and the width is between 1800-3000. The corresponding grades are Q690C, Q690D, Q690E, Q690F, etc. are the same grade but different grades.

Q690D low-alloy high-strength steel under the China standard GB/T16270-2009. Q690D steel plate has good cutting and welding performance, and has strong fatigue resistance. Q690D low-alloy steel is often used as a special workpiece for mechanical equipment, or for high-frequency vibration equipment parts. Q690D carbon and low-alloy steel is mainly used in the manufacture of various large-scale engineering structural components and construction machinery industries such as power towers, various types of lifting cranes, heavy-duty vehicles, oil derricks, high-temperature fans, large electric shovels, dump trucks and drilling rigs, and coal mine hydraulic supports. Due to its high strength and good toughness, it can reduce the self-weight of components under the condition of ensuring performance, and meet the requirements of large-scale and light-weight engineering components and equipment.

Q690D Steel Datasheet

Steel Grade	Q690D Carbon High-Strength Steel
Standard	GB/T16270-2009
Thickness	0.15mm-300mm
Width	300-2250mm or according to customer's special request
Length	1000mm-12000mm or according to customer's special request
Tolerance	Thickness: +/-0.02mm, Width:+/-2mm
MOQ	2 Tons
Application	1.Automobile, Bridges, Buildings. 2.Machinery, Pressure vessel industries. 3.Ship building, Engineering construction. 4.Mechanical manufacturing, Pavement slab, ect.
Package	Bundle with steel strip,Container shipping
Capacity	200000 tons /month
Mill MTC	can be supplied before shipment
Inspection	The Third Party inspection can be accepted,SGS,BV

Q690D Steel Chemical composition

C	Si	Mn	P	S	Nb	N
0.20	0.8	1.70	0.025	0.015	0.06	0.015
V	Ti	Cr	Ni	Cu	Mo	B
0.12	0.05	1.50	2.00	0.50	0.70	0.005

Q690D Steel Mechanical Properties

Grade	Thickness(mm)	Yield Strength (Mpa)	Tensile Strength	Elongation(%)	Impact Energy (Min)
Q690D	T≤50	Yield Strength (Mpa)	690	Elongation(%)	770-940	14	0	47
	50<T≤100	650	760-930	14	-20	47
	100<T	630	710-900	14	-40	34

Equivalent Grade of Q690D Steel

Grade	Standard	Country	Application
S690Q	EN	Europen	Mainly used in machinery manufacturing, such as marine equipment, cranes, large forklifts, steam turbines
1.8931	EN	Europen	Widely used in the manufacture of boilers and pressure vessels in petrochemical, manufacturing, shipbuilding and other industries