Q580R - GB /T 713.6-2023

Grade	Q580R
Corresponding Standard	GB /T 713.6-2023 Steel Plate, Sheet and Strip for Pressure Equipments— Part 6: Quenched and Tempered High Strength Steel
Classification	Alloy Steel

Q580R Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo	Ti	V	Nb	B	More
Minimum Value	-	0.15	1.2	-	-	-	-	-	0.1	-	0.02	-	-	Pcm≤0.25
Maximum Value	0.1	0.4	1.6	0.015	0.008	0.5	0.4	0.25	0.3	0.03	0.06	0.05	0.002	Pcm≤0.25

Q580R Mechanical Properties

thickness t mm	Tensile Strength σ_b Mpa	Specified Plastic Yield Strength Rp_0.2 Mpa	Elongation or Extension Rate δ %	Impact Energy Absorption KV2 J
10~60	690~820	ReL ≥580	≥16	-20°C ≥80

• When the yield phenomenon is not obvious, the specified plastic extension strength Rp0.2 is adopted.
• According to the requirements of the buyer, steel plates with a thickness greater than 36mm can undergo drop weight test. The test method shall be carried out in accordance with the provisions of GB/T 6803. The sampling quantity and sample position shall be specified in the contract. The qualified indicators for the drop weight test shall be determined through mutual consultation by both parties.

• 180° bending test (b=2a mm) Bending head diameter D: D=3a. a= Sample thickness, b= sample width.
• The lateral expansion value LE of the impact specimen is ≥ 0.64mm.

Approximate Comparison Table Pressure-Bearing Flat Steel

China	United States
GB	ASTM
Q580R GB/T 713.6-2023	SA533 Type B Class 3 ASME SA-533/SA-533M-2021

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