JIS G3429 Sth11, Sth12, Sth21, Sth22 Seamless Steel Pipe

• Type: Seamless
• Technique: Cold Drawn
• Material: Alloy Steel
• Surface Treatment: Black
• Usage: Boiler Pipe, Oil/Gas Drilling, Machinery Industry, Mining, Construction & Decoration, Special Purpose
• Section Shape: Round
• Model NO.: KM-307
• Size: Outside Diameter 10-194mm, Thickness 1-20mm
• Delivery Time: 20-35 Days Ex Mill
• Sample: Can Be Provided
• Testing Way: The Third Party Test Acceptable
• Material Grade: Sth11, Sth12, Sth21, Sth22
• Surface: Oiled or Black Painted
• Loading Port: Chinese Main Port
• MOQ: 5tons / Each Size
• Transport Package: in Bundles or According to Customers′ Request
• Specification: ISO
• Trademark: kingmetal
• Origin: China
• Production Capacity: 20000ton/Month

Product Description

JIS G3429 STH21 Seamless Steel Pipe Tube
 

JIS G3429 specified seamless steel tubes used for the manufacture of seamless steel gas cylinders. JIS 3429 tubes shall be classified into 5 grades, Grade STH21 tubing is a medium and low carbon chromium-molybdenum type used for pressure vessel made by seamless manufacturing methods. The service environment of high pressure gas cylinders put forward higher requirements for the performance of the steel tube, material STH21 is more widely used as a cylinder material in high load working environment due to its high strength at high temperature and excellent creep strength.

 

Standards: JIS G3429

Outer Dimensions: 19.05mm - 114.3mm

Wall Thickness: 2.0mm~40.0mm

Length: 5.8- 16000mm

 

CHEMICAL COMPOSITION

C	Si	Mn	P	S	Ni	Cr	Mo
0.25-0.35	0.15-0.35	0.40-0.90	≤0.030	≤0.030	≤0.25	0.80-1.20	0.15-0.30

 

SIZE TOLERANCES

Outside diameter	Wall thickness	Wall thickness disparity	Length
1%	+30%	Within 20% of the nominal wall thickness	>+30mm

 

JIS 3429 standards specified seamless steel tubes to be used the high pressure gas cylinder manufacturing specified in JIS B8320 and JIS B8241. We can manufacture the following grade of seamless steel pipe for gas cylinder: STH11, STH12, STH21, STH22, or other else grades. World iron&steel is a professional supplier and vendor of alloy steel tubing and piping. We manufacture and distribute high quality STH21 steel round tubing for cylinder application in accordance with JIS G3429 standards, specified delivery conditions and final customer specifications for industrial and commercial applications.      

 

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