Shipment records of MP35N cobalt rods and SGS test reports exported to Lork Group in the United States

2026-10-14

Order Overview

Lork Group (News Center) – In July 2025, Lork Group successfully completed the shipment of an order for MP35N cobalt-based alloy rods to a U.S. client. The delivery consisted of four MP35N alloy rod samples, accompanied by a third-party inspection report from SGS confirming that all tested parameters met the required standards. These materials, destined for the United States, were intended for the manufacture of critical components—specifically high-pressure sealing and suspension systems—used in deep-sea oil and gas extraction equipment.

By October 2026, Lork Group received formal feedback from the U.S. client confirming that the previously delivered MP35N alloy rod samples had successfully passed all material tests. Consequently, the client initiated the process for a formal order. This milestone marks yet another instance of Lork Group gaining recognition from international clients in the specialty alloy export sector.

Sample Review: Four Bars and Three SGS Tests

Sample Review: Four Bars and Three SGS Tests
This sample order comprised a total of four MP35N alloy bars with the following specifications:

2 bars: Diameter 19.7 mm, Length 2085 mm
2 bars: Diameter 29.13 mm, Length 2085 mm

Prior to shipment, SGS issued a third-party inspection report covering Rockwell hardness testing, tensile testing, and chemical composition analysis; all results met the specified standards. Upon receipt, the customer conducted internal material testing and confirmed that all parameters met their application requirements.

Please contact us for detailed SGS inspection data or a quotation for MP35N cobalt alloy material.

Quality Inspection Details

Prior to shipment, the Lork Group quality control team conducts rigorous, multi-stage inspections of the MP35N cobalt alloy bars—covering chemical composition analysis, mechanical property testing, dimensional accuracy verification, and surface quality assessment—to ensure full compliance with NACE MR0175 / ISO 15156-3 standards and specific customer technical specifications. Concurrently, the team documents the process photographically and compiles detailed reports for record-keeping. Retained samples are assigned unique identification numbers and properly archived to facilitate future traceability.

Our quality inspection process is safeguarded by a dual-stage system comprising both initial and secondary inspections. The preliminary inspection for every shipment encompasses five fundamental checks: specifications, quantity, tolerances, surface quality, and packaging. For example:

Dimensional Tolerances: Measure the diameter of the MP35N alloy rod at multiple points using a micrometer, measure its length with a tape measure, carefully inspect the cross-sectional edges for burrs, and check the surface for oil contamination.

Chemical composition analysis of MP35N cobalt alloy rod samples using a spectrometer

Length inspection of MP35N cobalt alloy bars

MP35N cobalt alloy rods packed in wooden cases and shipped to the United States

The second round of re-inspection comprises 3 to 6 specific data tests—such as chemical composition analysis, mechanical property testing, hardness testing, and specialized examinations. Adhering to the principle of "grounding operations in standard protocols and relying on the proper use and sterilization of testing instrumentation," multiple rounds of random sampling and data cross-verification are conducted to ensure the "correctness" of the material.

View more order details.

To protect client privacy, some information is provided for reference only.

Industrial application: Key components for deep-sea oil and gas extraction

The MP35N bar stock purchased by the client is used to manufacture equipment for deep-sea oil and gas extraction. MP35N (UNS R30035) is a nickel-cobalt-chromium-molybdenum-based multiphase alloy; its most notable advantage is the combination of ultra-high strength and resistance to corrosion in extreme environments.

In deep-sea operating conditions, equipment must withstand high pressure, media with high sulfur content, seawater corrosion, and cyclic loading. Through cold working and aging treatments, MP35N can achieve a tensile strength of 1,790 to 2,090 MPa (260–300 ksi) while demonstrating excellent resistance to stress corrosion cracking in hydrogen sulfide, seawater, and chloride environments. Specific applications include:

High-pressure seals: Metal sealing assemblies for Christmas trees and downhole tools.
Hangers and load-bearing connectors: Maintaining high strength over long periods in seawater environments.
Springs and fasteners: Non-magnetic and corrosion-resistant, suitable for precision downhole instruments.

Industry data indicates that MP35N is virtually immune to crevice corrosion and stress corrosion in seawater environments, even at peak strength levels. This is the primary reason why deep-sea oil and gas clients choose this material.

From Samples to Orders: Customer Trials Passed, Formal Order Processing Underway

Customer feedback indicates that the MP35N samples successfully passed all material tests. This outcome validates Lork Group’s capabilities regarding material consistency, testing integrity, and reliable export delivery.

The U.S. client has now formally initiated the ordering process for a larger volume of MP35N bar stock. Lork Group’s foreign trade and production teams are coordinating with the client on matters such as technical specification confirmation, production scheduling, and the preparation of export documentation.

Guided by the principles of "reliable materials, complete documentation, and on-time delivery," Lork Group remains committed to providing high-quality alloy materials that meet international standards to customers in the global oil and gas, medical, and aerospace sectors.

Choosing the Lork Group means choosing precise material matching and reliable global delivery.

Email: daisy@lorkgroup.com
WhatsApp: +86 175 1308 1871