01
Steel pipes
Seamless, carbon, alloy, precision, mechanical and structural pipe forms for industrial systems, machined assemblies and project supply.
Carbon & alloy steel · Export supply
Steel supply.
Every detail
considered.
RUNSU supplies steel pipes, round steel bars, forged shafts and machined shafts to overseas industrial buyers — with material, processing and export requirements settled before the order moves.
Selected steel stock / pipes · bars · shafts
01 / The supply brief
The order is won or lost in the details before steel moves.
RUNSU works with overseas buyers who need carbon and alloy steel materials matched to a drawing, a standard or a production requirement. The work starts with the grade, size and end use — not a generic stock list.
From pipe and bar supply to forged and machined shafts, we coordinate the practical steps around the material: processing, inspection, documents and shipment preparation.
01
Requirement review
Product form, grade, dimensions, quantity, application and delivery terms are read together.
02
Supply coordination
The material route is checked against the specification and the commercial requirement.
03
Processing follow-through
Cutting, forging, machining, heat treatment or surface work is placed in the agreed sequence.
04
Export preparation
Documents, dimensional checks, packing and dispatch details are confirmed before shipment.
02 / Product families
Three ways into the specification.
Start with the form of steel you need. Each family brings a different set of questions to settle before quotation.
02
Round steel bars
Hot rolled, forged, bright and precision-ground round bars for machining, forging, equipment components and production stock.
03
Forged & machined shafts
Shafts reviewed from drawings, with forging, machining, heat treatment and inspection steps coordinated to the agreed technical route.
03 / How an inquiry moves
A clear route from requirement to readiness.
No blind hand-off. Each stage produces information the next stage can act on.
01
Requirements in writing
Product, grade, size, quantity, application and delivery terms. Add drawings or technical specifications when available.
02
Feasibility & quotation
Supply route, processing scope, documentation needs and commercial terms are checked against the request.
03
Order coordination
Cutting, forging, machining, heat treatment or surface work is arranged in the sequence confirmed for the order.
04
Check & prepare
Dimensions, documents and packing are reviewed; pre-shipment photos and dispatch preparation are handled as agreed.
04 / Material references
A common language, not a shortcut.
Chinese, American, European and Japanese grade references can be discussed side by side. They are a starting point for confirmation, not a declaration that grades are interchangeable.
Read the material reference guide- Carbon
- 20# · 35# · 45# · 50# · Q235 · Q355
- Alloy
- 20Cr · 40Cr · 20CrMnTi · 35CrMo · 42CrMo · 38CrMoAl
- International references
- AISI 1045 · 4140 · 4340 · 8620 · EN8 · EN19 · EN24 · 16MnCr5
Important
Grade names are reference points. Chemistry, mechanical properties, heat-treatment condition, dimensions and standard edition must be confirmed against the drawing or purchase specification before quotation or production. Similar names do not automatically mean interchangeability.
05 / Procurement FAQ
Questions buyers ask before the RFQ.
A useful inquiry gives us enough context to check the material, the process and the export route. These are the points that most often need clarification.
Can you work from a drawing instead of a grade?
Yes. For shafts and custom machined items, send the drawing with tolerance, heat-treatment and inspection requirements. We can review the route and identify missing details before quotation.
Do you have a minimum order quantity?
Quantity is part of the quotation review rather than a blanket rule. Share the quantity required and the application; availability and commercial fit are confirmed case by case.
Can one grade be substituted for another?
Only after written confirmation. Similar names in different standards can differ in chemistry, mechanical properties, heat-treatment condition and supply form. We do not treat grade references as automatically interchangeable.
What documents can be discussed?
Depending on the order, material certificates, packing lists, commercial invoices, pre-shipment photos and other agreed export documents can be checked or coordinated. State the requirement before quotation.
How are delivery destinations handled?
Delivery is quoted against the destination port or delivery address you provide. Freight, Incoterms and the final delivery scope are confirmed in the quotation.
Bring the specification.
We will map the route.
Send the product family, grade, dimensions, quantity, processing requirement and destination. Drawings and technical documents are welcome.