Requirement Review
We confirm grade, dimensions, standards, quantity, destination and the intended application.
Company profile
Quality, reliability, and innovation — serving customers worldwide.
Jiangsu Ranboyu Metal Products Co.,Ltd is a premier industrial metals manufacturer and supplier based in Wuxi, Jiangsu, China — one of the world's most dynamic steel production hubs. We provide year-round supply of stainless steel, carbon steel, copper, and nickel alloy products to tens of thousands of customers across the globe.
With a strong supply chain network, solid professional knowledge, and reliable service, we have become the preferred steel supplier for companies worldwide. Our comprehensive inventory covers over 100 grades and 500+ product specifications — all backed by ISO-certified quality systems and full material traceability.
We stock products and ship upon payment. Discounts are available for bulk orders. We also offer custom processing and fabrication services — laser cutting, bending, and manufacturing from your drawings — a true one-stop solution for any material and specification.
Year-round stock of 100+ grades across 4 material families. Fast dispatch from multiple warehouse bases.
MTC EN 10204 3.1 certificates, mill test reports, chemical analysis, and mechanical properties with every shipment.
Laser cutting, bending, welding, and fabrication from your drawings. Any material, any design.
Preferential pricing for volume orders. Long-term contract pricing available for reliable partners.
Expert metallurgical guidance on material selection, grade equivalents, and application engineering.
Project-ready supply
A clear, controlled supply route for every material requirement — from the first specification to export-ready delivery.
We confirm grade, dimensions, standards, quantity, destination and the intended application.
We match the material supply, then arrange cutting, slitting, forming or custom fabrication where required.
Product condition, dimensions and documentation are checked before dispatch for practical traceability.
Secure packing, shipment coordination and responsive sales support keep your material moving.
Precision chemical composition verification for every heat
23CrNi3Mo - Round Bar
23CrNi3Mo - Tube
304 SS - Coil
304 SS - Tube
304 SS - Square Tube
304 Decorative Tube
30CrNiMo8 - Flat Bar
30CrNiMo8 - Flat Bar 2
316L SS - Plate
316 Seamless Tube
316 Seamless Tube 2
316 Tube
321 Square Pipe
321 Flat Bar
321 Tube
32CrNiMo4 - Round Bar
430 Coil
5052 Checkered Plate
AISI 4130 Bar
AISI 4140 Bar
AISI 4130 Bright Bar
CW617N Brass Bar
H68 Brass BarState-of-the-art manufacturing facilities and quality control processes
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Advanced testing equipment ensures every batch meets international standards
Measures ultimate tensile strength and yield strength to ASTM standards.
Measures ductility and elongation after fracture per ASTM E8 standards.
Rockwell, Brinell and Vickers hardness testing across all product forms.
Mechanical property verification at elevated service temperatures.
Precision OES spectrometry for exact chemical composition verification.
Charpy impact testing at ambient and sub-zero temperatures.
OES and XRF spectrometers verify exact elemental composition of every heat.
Precision measurement of length, straightness, and dimensional tolerances per international standards.
A proven track record of quality, reliability, and value across four material categories
Over 100 grades and 500+ specifications across stainless steel, carbon steel, copper, and nickel alloys. From standard sizes to custom compositions, we supply it all from stock.
Beyond raw materials, we process and customize — laser cutting, bending, welding, and finishing. Send us your drawings; we deliver finished parts with precision.
ISO-certified quality systems with in-house spectrographic analysis, tensile testing, hardness testing, impact testing, and ultrasonic flaw detection for every order.
Experienced international shipping team. Container loading, export packing, and freight coordination to ports and project sites across 50+ countries worldwide.
Direct mill sourcing eliminates middlemen. Bulk order discounts and long-term contract pricing ensure your procurement costs stay optimized.
MTC EN 10204 3.1 certificates, chemical composition reports, mechanical test data, and material traceability documents provided with every shipment.
Year-round inventory means immediate availability. Order today, ship tomorrow. No long lead times — we stock so you don't have to wait.
Our commitment doesn't end at delivery. Technical support, quality guarantees, and responsive service throughout your project lifecycle.