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GB/T 6653 HP325 Steel Plates and Strips For Welded Gas Cylinders

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GB/T 6653 HP325 Steel Plates and Strips For Welded Gas Cylinders

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GB/T 6653 HP325 steel plate and strip is a high-quality carbon structural steel material specifically designed for welded gas cylinders, offering specific strength along with excellent toughness, plasticity, and weldability.

Standard :
GB/T 6653
Grade :
HP325
Thickness :
2.0 - 14.0 mm
Width :
1100.0 -1500.0 mm

* Specifications and dimensions can be customized.

* Machining services are available.

Overview

GB/T 6653 HP325 Carbon steel plates and strips possess high strength, good weldability, and excellent impact toughness, and are primarily used for manufacturing welded gas cylinders.

Grade	HP325
Standard	GB/T 6653: Chinese National Standards - Steel plates and strips for welded gas cylinders
Delivery Conditions	Hot-rolled
Surface Quality	Free from cracks, scars, folds, blisters, and other defects.
Weldability	Good weldability, control the heat input, preheating (50~100℃) before welding can reduce the risk of cold cracking.
Machinability	Good formability, easy to process such as cold stamping, stretching, and bending.
Quality Control	Material certificate Ultrasonic Testing (UT) or Radiographic Testing and Charpy V-notch impact test can be performed as required.

Chemical Composition

Grade	HP325
Element	C	Si	Mn	P	S	Al
Content (%)	≤ 0.20	≤ 0.35	≤ 1.50	≤ 0.025	≤ 0.012	≥ 0.020

* If necessary, alloy elements other than those in this table may be added.

Mechanical Properties

Grade	Yield Strength (ReH) [min, MPa]	Tensile Strength (Rm) [MPa]	Elongation (A) [min, %]	Bend Test
HP325	325	490 - 600	18 (thickness < 3 mm) 22 (thickness ≥ 3 mm)	Bend angle = 180° Inside radius = 2.0 times the thickness Crack-free

Applications

1. Industrial Welding Cylinders: Oxygen cylinders, nitrogen cylinders, argon cylinders, acetylene cylinders, etc.

2. Liquefied Petroleum Gas (LPG) Cylinders: Household and commercial gas tanks, propane cylinders.

3. Other Welded Cylinders: Automotive compressed natural gas cylinders, etc.

Other Information

International Equivalent Materials

Grade	Standard	Yield Strength (ReH) [min, MPa]	Tensile Strength (Rm) [MPa]	Elongation (A) [min, %]
HP325	GB/T 6653	325	490-600	18 (t < 3 mm) 22 (3 ≤ t ≤ 5 mm)
P310NB	EN 10120	310	460 - 550	21 (t < 3 mm) 28 (3 ≤ t ≤ 5 mm)
SG325	JIS G 3116	325	490(min)	22

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