Q6: How do you protect extra-large 8-meter rings from rust and distortion during ocean freight?

A: We use specialized heavy-lift export preservation: rings receive a 100% heavy anti-rust oil coating and are fully wrapped in industrial VCI moisture-proof film. They are then secured using custom structural steel internal bracing and heavy wood cradles inside Flat-Rack or Open-Top containers to prevent ovality shifts during lashing.

High Precision Ring Forgings Custom Large Diameter Stainless Steel Rolled Rings

Name: High Precision Ring Forgings Custom Large Diameter Stainless Steel Rolled Rings
Brand: Xinlong Machinery & Equipment (Zhengzhou) Co., Ltd.
SKU: 2181606842

Henan, ChinaXinlong Machinery & Equipment (Zhengzhou) Co., Ltd.

US$1,000.00-4,000.00

1 Piece

Product profile

Customization

Available

Processing Object

Metal

Molding Style

Forging

Model NO.

SR-260820

Molding Technics

Rolled Ring Forging

Application

Machinery Parts

Material

Steel

Heat Treatment

Quenching

Surface Treatment

Passivation

Forging Tolerance

+/-0.1mm

Standard

AISI

Certification

CE, Ts16949

Forging Capacity

6300 Ton

Shape

Ring, Shaft, Round Bar, Block, Sleeve, Wheel, Cyli

Drawing Custom

Yes

Video Outgoing-Inspection

Provided

Machinery Test Report

Provided

Transport Package

Heavy Duty Pallet

Specification

300 mm to 8, 000 mm

Trademark

XME

Origin

China

HS Code

8431432000

Production Capacity

1000t /Month

Key features

Elite 8,000 mm Rolling Capacity: We stand among a select group of manufacturers globally capable of hot rolling seamless rings from small dimensions up to an extra-large 8m (8,000 mm) outer diameter.

Our seamless ring rolling process aligns the metal's crystalline fibers along the circumference, increasing fatigue life and structural integrity by over 200% compared to cast or welded alternatives.

Processed across our 30,000 square meters MES digital factory, every rolled ring is precision-finished on mega CNC vertical lathes to guarantee exact dimensional adherence to your technical drawings.

Every critical heavy-duty ring is subjected to strict Ultrasonic Testing (UT) compliant with ASTM A388 / EN 10228-3 to certify a 100% crack-free, flawless internal structure.

We source premium steel ingots with standard EN 10204 3.1 Mill Test Certificates, ensuring complete chemical and heat-number tracking from raw material sawing to final packaging.

Company profile

Importers and ExportersHigh Repeat Buyers ChoiceYears of Export ExperienceIn-stock Capacity

Xinlong Machinery & Equipment (Zhengzhou) Co., Ltd.

Henan, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 20 Years CertifiedNearest Port: Qingdao PortAverage Response Time: ≤4.57h

AI-Powered supplier vetting

SummaryThe supplier is identified as a combined company and, in basic company information, as a trading company located in Zhengzhou, China. It reports customization, 3D design, ODM, and recent new-product capabilities, with one production line and listed machinery including drilling, milling, oven, spray booth, core shooting, and shot blasting equipment. Quality control staffing is reported at 21–30 employees, but finished products are checked by packing staff and no supplier-management certification is listed. Service governance is weakly documented: there are no written procedures or records for service assessment or corrective/preventive actions, although a complaint-handling procedure exists without written records. It has exported for 20 years and lists Europe and North America as primary export markets, but reports no overseas warehouse, showroom, agent, branch, or offline trade-show participation. Financial information references multiple years but does not provide sufficient non-financial evidence to...

CertificationsThe supplier’s management-system certification status is explicitly listed as NIL. No certification evidence is provided in the supplied information.

After-Sales capabilityThe supplier has a complaint-handling procedure, but no written records; it also lacks written service-assessment and corrective/preventive-action procedures. It reports no overseas warehouse, showroom, agent, branch, or offline trade-show presence, although it accepts several quotation and payment methods and identifies Qingdao Port as its nearest service location.

R&D capabilityThe supplier reports 3D software design, ODM, multiple forms of customization, and new products during the past year. However, it has no available SDK and reports only one year of total R&D engineer experience, so the overall depth of innovation resources cannot be confirmed.

Production capacityThe supplier lists drilling, oven, spray booth, core shooting, shot blasting, and milling equipment, and reports operating one production line. It also reports 21–30 quality-control staff, but finished products are checked by packing staff, leaving the effectiveness of the stated production and quality-control structure only partially demonstrated.

Customization capabilityThe supplier explicitly offers customization from samples, customization from designs, full customization, minor customization, and flexible customization. It also provides 3D software design services, directly supporting a broad customization offering.

Product Q&A

Q:Q1: What are your maximum size and weight capabilities for seamless rolled rings?

A: Our production limits are highly competitive: Maximum Outer Diameter (Max OD) is 8,000 mm (8 Meters); maximum face height/width is up to 1,200 mm; and the maximum single-piece forged weight reaches up to 35 Metric Tons.

Q:Q2: Which material grades can you forge and machine?

A: We process a broad range of verified steel categories: Carbon Steel: ASTM A105, Q345B/D/E, S355NL, S355J2G3, C45 Alloy Steel: 42CrMo4, 4140, 34CrNiMo6, 18CrNiMo7-6, 8620 Stainless Steel: 304/304L, 316/316L, Super Duplex F51/F53/F55, 1Cr13, 2Cr13

Q:Q3: Do you accept production based strictly on customer drawings (OEM/ODM)?

A: Yes. We operate on a 100% custom-manufacturing model according to drawings. We accept blueprints in PDF, STEP, DWG, and DXF formats. Our engineering team conducts a complimentary Design for Manufacturing (DFM) review to minimize raw material waste.

Q:Q4: What heat treatment services do you provide in-house?

A: Our heavy workshops are equipped with large-scale, digitally monitored heat treatment furnaces. We perform Normalizing, Annealing, Quenching & Tempering (Q&T), and localized induction hardening to achieve your exact required yield strength and surface hardness.

Q:Q5: What quality documentation do you provide before shipping?

A: Every export shipment is backed by a comprehensive Quality Inspection Dossier including an EN 10204 3.1 Mill Test Certificate (MTR), UT/MT Non-Destructive Testing Reports, Digital Heat Treatment Curves, and Final Dimensional Inspection Sheets.