JIS G3461 STB340 STB410 STB510 Cold Drawn Seamless Steel Tube
Production Introduction
JIS G3461 specifies the carbon steel tubes used in chemical and petroleum industry, such as water tubes, smoke tubes, super heater tubes, air preheater tubes, etc. Manufacture: tubes shall be made by the seamless process and shall be either hot-finished or cold-finished, as specified. Heat Treatment: hot-finished tubes need not be heat treated. Cold finished tubes shall be heat treated after the final cold-finishing at a temperature of 1200°F [650°C] or higher. Inspection & Test: chemistry composition analysis, tensile test, flattening test, flaring test, hardness test, NDT, surface inspection and dimension check. Length: 5000mm; 6000mm; 9000mm; 12000mm; and so on.
Standard: JIS G3461
Equivalent Standards: ASTM A210, EN 10216-2, DIN 17175, BS 3059 Part II, NF A 49-213, NBR 5592, UNI 5462-64, ISO 9329-2, ISO 9330-2 Material: STB410 Equivalent Materials: SA210A1, C18, CFS 430, 20G
O.D:15.9-139.8mm
W.T:1.2-12.5mm
Length: max 19000mm
JIS G3461 Chemical composition
| Standard |
Grades |
Chemical composition |
| C |
Si |
Mn |
P |
S |
| JIS G3461 |
STB340 |
≤0.18 |
≤0.35 |
0.30~0.60 |
≤0.035 |
≤0.035 |
| STB410 |
≤0.32 |
≤0.35 |
0.30~0.80 |
≤0.035 |
≤0.035 |
| STB510 |
≤0.25 |
≤0.35 |
1.00~1.50 |
≤0.035 |
≤0.035 |
JIS G3461 mechanical properties
| Standard |
Grades |
Tensile strength
(MPa) |
Tensile strength
(MPa) |
Elongation (%) |
| JIS G3461 |
STB340 |
≥340 |
≥175 |
≥35 |
| STB410 |
≥410 |
≥255 |
≥25 |
| STB510 |
≥510 |
≥295 |
≥25 |
Company Profile
From 1989 to now, Kingmetal Steel focus on manufacturing and distributing pipeline products including piping, fitting, flange, valve and fastener in stainless, carbon, alloy and duplex steel.
Kingmetal has a factory to manufacture seamless stainless steel pipe from DN6 to DN600 and distribute seamless steel pipe and fitting from top brand manufacturers such as Baosteel, Hengsteel, Tiansteel and Pansteel etc.
All of products are strictly compliance with standard, 100% inspection passed including visual, dimension and PMI test before shipment.
Both our sales and logistic teams are over 10 years of experiences and training frequently.
After- sales service with high efficiency, if any products are short quantity/weight or damaged caused by manufacturing, design or transportation can be compensated.
Why choose us?
One-Stop Solution
We have thousands of total production experience, from raw materials to finished products.
Competitive Price
Large scale purchase, standardized production process and efficient management make our price competitive.
Quick Shipping
Years of export experience enable us to control the transportation time more accurately.
Quality Control
The standardized production process, comprehensive management system, professional testing equipment
Special material customization
We support the customization of various complex materials
OEM/ODM
We support any form of OEM/ODM customization requirements.
Audited Supplier 
Audited Supplier 
){kind=link}
){kind=link}