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Q195 A53 Gr.A S195T STK400 Carbon Steel Structure Pipe | Low Carbon Steel Tube
- Low carbon composition, excellent ductility, easy for bending, roll forming and profiling
- Multi-standard equivalent grades: GB Q195, ASTM A53 Gr.A, EN S195T, JIS STK400
- Excellent weldability, compatible with on-site welding, threaded and flanged connections
- Wide size range from NPS 1/4″ to 12″, multiple wall thickness schedules available
- Custom cut-to-length & end processing (plain, beveled, threaded) for project requirements
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Product Overview
Q195 carbon steel structure pipe is a general-purpose low-carbon tubular product, with equivalent grades including **ASTM A53 Grade A, EN S195T and JIS STK400** under different international standard systems. It is manufactured from Q195 low-carbon steel billet via high-frequency ERW welding process (seamless option also available for special requirements), featuring balanced strength, good ductility and excellent weldability. It is the most cost-effective choice for light structural support and low-pressure fluid transportation.
This series of carbon steel pipe is produced in strict accordance with GB/T 3091, ASTM A53, EN 10219 and JIS G3452 standards. Available nominal pipe size covers NPS 1/4″ to 12″ (DN6 – DN300), with common wall thickness schedules including Schedule 10, Schedule 20, Schedule 40 and Schedule 80. Standard fixed length is 6m and 12m, and custom non-standard length from 3m to 18m can be supplied according to project design. Pipe end options include plain end, 30°/37.5° beveled end and threaded end to adapt to different connection scenarios.
Q195 / A53 Gr.A / S195T / STK400 carbon steel pipe is widely used in light building structure frameworks, scaffolding pipes, highway guardrails, low-pressure water & gas pipelines, equipment support frames, agricultural facilities and general structural fabrication. We provide secondary processing services such as cutting, beveling, groove machining and surface treatment.
Chemical & Mechanical Property Snapshot
Detailed Technical Specifications
Pipe Shape Options Table
Dimension Range Table
Product Comparison Table
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FAQs
Q195 corresponds to ASTM A53 Grade A in American standard, S195T in EN standard and STK400 in JIS standard. They have similar mechanical properties and can be substituted for each other in general structural scenarios.
It is widely used for light building structures, scaffolding pipes, highway guardrails, low-pressure water and gas transmission pipelines, equipment support frames, agricultural facilities and general structural fabrication.
Yes. Q195 is low carbon steel with extremely good weldability, suitable for on-site welding assembly, and compatible with threaded, flanged and welded connection methods.
Yes. Pipe length, end type, beveling, and other processing requirements can be customized according to project needs.
The MOQ is 5 tons for standard sizes. Small trial orders for special specifications can be negotiated case by case.
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