JIS G3445 STKM11A Carbon Steel Seamless Tubes
GNEE sells more than 1,500 tons of seamless and welded steel pipes to various engineering industries each year. Our goal is to ensure that our customers have the highest expectations for the delivery and product quality of JIS G3445 seamless steel pipes.
JIS G3445 STKM11A steel pipe contains a certain amount of silicon and manganese in addition to carbon elements and deoxidation. At the same time, the content of impurity elements sulfur and phosphorus is controlled below 0.040%.JIS G3445 STKM11A carbon steel pipe is a low carbon steel pipe. Compared with high carbon steel pipes, it has better weldability and can improve surface hardness through carburizing.
JIS G3445 STKM11A seamless pipe has a wide range of applications and strong plasticity. It is mainly used to manufacture general structures and mechanical structures, components and building structures, and pipelines for conveying fluids.
JIS G3445 STKM11A Structural pipe Product specification
JIS G3445 STKM11A Carbon steel seamless pipes Chemical Properties
| max 0.12 | max 0.35 | max 0.60 | 0.04 | 0.04 | – | – | – | – | – |
JIS G3445 STKM11A Seamless steel pipes Mechanical Properties
| Elongation A5 min | |||||
|---|---|---|---|---|---|
| 290 | – | – | 35 | ||
JIS G3445 STKM11A Pressure steel pipe

Gnee has 14 steel production lines, 10 processing equipment for processing, bending, painting, heat treatment, cutting, drilling, beveling, tempering, surface treatment, complete testing equipment and strong technical force. The annual production capacity is more than 60,000 tons.

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