Wholesale Precision Steel Hollow Bars - S355JR & A36 High-Accuracy Polished Round Bars Suppliers, Company, Exporter

Precision Steel Hollow Bars - S355JR & A36 High-Accuracy Polished Round Bars

High-precision hollow polished bars made from S355JR low-alloy high-strength steel and A36 carbon steel. S355JR provides a yield strength ≥355 MPa, while A36 offers a tensile strength ≥400 MPa. Both inner and outer surfaces are polished to Ra1.6, with an inner-diameter tolerance of ±0.1 mm. Ideal for support shafts in construction machinery and lightweight structural components, the hollow design maintains strength while reducing material usage and overall cost.

Processs	Forged steel hollow bar or Casting steel hollow sleeve
Material	Stainless Steel, Carbon Steel, Alloy Steel, Aluminum, Copper, Ductile Iron, Grey iron, etc
Material Grade	GB, ASTM , AISI , DIN , BS, JIS, NF
Weight	0.01 kg~150kg
Accuracy	Class CT4~CT11
Surface Roughness	Up To Ra1.6~Ra6.3
Applied Software	PDF, Jpeg, Jpg, Png,etc
Production Capacity	More Than 1000MT Per Month
Heat Treatment	Anneal, Quenching, Normalizing, Carburizing, Polishing, Plating, Painting,etc
Machining Equipment	CNC Center , CNC Machines, Turning Machines, Drilling Machines , Milling Machines, Grinding Machines, etc
Measuring Tool	CMM , Projector, Vernier Caliper, Depth Caliper, Micrometer, Pin Gauge, Thread Gauge, Height Gauge, etc
QC System	100% Inspection Before Shipment
Application	Auto Parts, Agricultural Machinery Parts, Construction Machinery Parts, Marine Hardwares, Valve Parts, Led Light Parts, Railway Parts, Home Hardwares, Electronic Parts, Military Parts, etc
Lead Time	Depends On Order Quantity.Normally 15~40 Days.
Certification	ISO9001:2008
Payment Terms	T/T , L/C, D/P , D/A,etc
Shipment Terms	FOB , CFR, CIF,EXW,DDP,DDU,FCA,etc

Jiangyin Golden Machinery Equipment Co., Ltd.

Jiangyin Golden Machinery Equipment Co., Ltd. covers an area of 10,000 square meters and has several standardized workshops. We specialize in the production of medium and small forgings and flanges, supported by advanced equipment and mature production technologies for sawing, forging, heat treatment, and precision rough machining.

We are China Precision Steel Hollow Bars - S355JR & A36 High-Accuracy Polished Round Bars Suppliers and wholesale Precision Steel Hollow Bars - S355JR & A36 High-Accuracy Polished Round Bars Company, Exporter. We are capable of meeting the requirements of customers across multiple industries, including power, petroleum, chemical engineering, metallurgy, machinery, light industry, and shipbuilding. By actively expanding into international markets, we have established cooperative relationships with several well-known enterprises, including Rich Reiter (Sweden), Alstom (France), Konecranes (Finland), Danieli (Italy), and General Electric (USA). Our products and services have earned wide recognition and praise from customers.

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For most industrial power transmission and linear motion applications, a 1045 medium carbon steel shaft with induction-hardened surface hardness of 55 HRC and an h6 diameter tolerance delivers the optimal balance of strength, wear resistance, and cost. A 25 mm shaft produced to this specification tr...
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