ASTM F138 UNS S31673 stainless steel capillary for surgical implants-316LVM

Product Specification

Xunshi are pleased to provide our customers with cost-effective surgical implants 316LVM capillary.

Story of 316LVM
316LVM, VM is Vac Melt, Vacuum Melted (vacuum melting). In fact, the production uses a dual vacuum melting process, VOD+VIM or VOD+VAR. 316LVM is currently widely recognized surgical implants for stainless steel.

During World War II, the United States conducted research on stainless steel materials used in the implantation of fracture treatment during wartime fractures. Post -war research results showed that the effect of 18%CR+8%Ni+2%MO type stainless steel application effect is the effect of stainless steel application effects is that the effect of stainless steel application is the effect of stainless steel application effects. the best. Since then, 316/316L has become a widely accepted implanted implanted stainless steel. Later, people gradually realized that 316LVM produced by more advanced smelting technology had better consistency and micro -purity and better corrosion resistance. Regarding the 316LVM (S31673) rod and silk material ASTM F138 specifications were published in 1978, the ASTM F139 published in 1976 was the relevant specifications of 316LVM boards and belt materials. Correspondingly, in Europe, the brand of this material is W.NR 1.4441. In recent years, the European Union has gradually replaced 316LVM instead of 316L as surgical implants for stainless steel. Even some jewelry that directly contacts the human body, such as nasal rings and lip nails, has begun to use 316LVM to produce. Although in terms of cost, 316LVM is several times more than 316L of ordinary levels, but due to the difference in performance, the market has gradually accepted the new thing of S31673.

The mainstream standards for stainless steel for surgical implants are ASTM F138 and ISO5832-1. In China, the GB 4234.1-2017 "Surgical Plant Metal Materials Part 1 forged Stainless Steel" formulated on the basis of ISO5832-1. Among the two standards of ASTM F138 and ISO5832-1, the chemical composition of 316LVM is basically the same, and it is just a slight difference in the composition of silicon elements. The ingredients of the industrial grade 316L are not as strict as the previous two, and therefore cannot present the excellent characteristics of surgical implantation of stainless steel. The lower P content makes 316LVM have better ductility, which allows 316LVM to face the cold craftsmanship more calmly. The maximum content of S elements is reduced from 0.030%of the industrial grade 316L to 0.010%of the implantation level, which can effectively improve the plot ratio of sulfide. Low silicon ingredients can provide better Austennic stability. High chromium content can have a positive effect on improving the corrosion resistance of materials, but at the same time, it will reduce the austenity stability of the material. The nickel content of 316LVM in the implantation level is higher than the industrial grade 316L, which ensures that the material has a complete Austenitic structure. The addition of copper elements is to effectively control the impurities in the smelting process. Molybdenum content and high chromium content ensure the carbon volume of the material ≥26, and the carbon equivalent ≥ 26 is also the unique feature of implanted stainless steel materials.

Equal grades

• 00Cr18Ni14Mo3
• UNS S31673
• DIN X2CrNiMo18-15-3
• 1.4441
• 316LVM

Chemical composition

Characters of 316LVM

• High strength
• High fatigue strength
• Excellent micro cleanliness
• Excellent structural homogeneity
• High surface smoothness
• Good consistency

Application of 316LVM 

• Hip stems
• Femoral heads
• Spinal systems
• Acetabular cups
• Intramedullary nails
• Bone screws
• Knee joints
• Pins, bone and nail plates
• Internal fixation devices
• Dental implants
• Staples
• Cardiovascular applications: guide wires and cardiac stents
• Surgical instruments and tools; blood lancets, stylets, trocars.

Forms of supply

• Capillary
• Seamless tube
• Welded tube
• Cold drawn wire
• Cold rolled strip
• Plate
• Hot rolled round bar
• Cold drawn round bar
• Hot forged bar

About XUNSHI

Suzhou Xunshi New Material Co. Ltd- referred as XUNSHI hereafter, is a professional manufacturer of high-performance alloy products. XUNSHI is engaged in supplying high quality and cost-effective Superalloy, Anti-Corrosion Alloy, Precision Alloy, Special Stainless Steel and Magnetostrictive Material to customers from worldwide.

Why XUNSHI

· Rich experience in alloy industry

· Top rank experts of industry in China

· Advanced technology and process from top famous institutes in China

· Advanced devices through whole production and inspection process

· Strict quality control system

· Company motto: best service, most value

· Smart sales policy

Service Items of XUNSHI

· Non-standard product research and pre-production

· Fabrication of products

· Cutting, splitting for sheets and plates in stock

· Heat treatment (Solution treatment, aging harden treatment, anneal, spring temper, quench etc.)

· Surface finish (peeling, gridding)

· Logistics service

· Customized packing service (also for exporting)

· Import and export (XUNSHI is certificated)

· Document translation

· Hard-to-find material sourcing

Customers of XUNSHI

Customers of XUNSHI are all over China (Taiwan and Hong Kong included). And we are exporting to USA, Canada, Italy, UK, Poland, Greece, Russia, Turkey, Iran, Israel, South Africa, South Korea, North Korea, India, Argentina, and Brazil and so on. Customers from 30+ countries trust us.

Where is XUNSHI

A- XUNSHI is located in Huaqiao, Kunshan, 215332 China, which is very closed to Shanghai.

B- Xunshi is around 80KM from Shanghai Pudong International Airport(PVG).

C- 20KM from Shanghai Hongqiao Airport

D- 20KM from Shanghai Hongqiao Railway Station

E- You can contact XUNSHI sales for a pickup service