316LVM 316LS S31673 Stainless Steel Seamless Capillary
1 PRODUCT
Stainless steel 316LVM, 316LS, S31673 seamless capillary.
2 EQUIVALENT DESIGNATION
316LVM, 316LS, UNS S31673, 00Cr18Ni14Mo3, X2CrNiMo18-15-3, W.Nr. 1.4441
3 APPLICATION
316LVM material has been used for many years for permanent implants with good corrosion resistance under annealing conditions. Many new alloys have been studied with 316LVM as a reference. This stainless steel has good ductility in cold working condition.
316LVM is used for implant applications, suture line, orthopaedic connecting wire, skin suture nail, catheter, stylet, bone nail, hipstems, femoralheads, spinalsystems, acetabularcups, intramedullarynails, bonescrews, kneejoints, and pins, bone and nail plates, internal fixation devices, dental implants, staples.
This grade is also used for cardiovascular applications: guide wires, cardiac stents and for surgicalin struments and tools; blood lancets, stylets, trocars etc.
4 OVERVIEW
Stainless steel 316LVM, 316LS and S31673 for surgical implants
This grade is a modified version of 316 with low carbon, high nickel and molybdenum. The purpose of the improvement of chemical composition is to maximize the corrosion resistance of the material by obtaining a ferrite free metallographic structure. In order to ensure purity and uniformity, the double vacuum smelting process (VIM+VAR) is generally adopted.
The material is non-magnetic even after strict cold - forming operation.
5 Smelting process
Process: VIM + VAR
6 Main properties
(1) High strength
(2) High fatigue strength
(3) Excellent microcleanliness and uniform
(4) Excellent structural homogeneity
(5) High surface finish
(6) Very good biocompatibility
7 Product specification
Size: OD0.12mm x WT0.015mm up to OD6.0mm x WT1.5mm
Tolerance: as per agreement
Standard:ASTM F981, ISO 5832-1, GB 4234.1
8 CHEMICAL COMPOSITION (wt% as per ASTM F138)
| Fe | Ni | Cr | Mo | N | C | Cu | Mn | Si | P | S |
| Balance | 13.0-15.0 | 17.0-19.0 | 2.25-3.00 | ≤0.10 | ≤0.03 | ≤0.05 | ≤2.0 | ≤0.75 | ≤0.025 | ≤0.010 |
9 PHYSICAL CONSTANTS
Density | Elasticity modulus | Electric resistance | Thermal conductivity | 32-212°F Average specific heat |
| 0.287 lbs/in3 (7.95g/cm3) | 27.9 psi x 106 | 740 µohms-mm | 16.3 W/mK(100°C) | 1200 Btu/lb/°F |
10 MECHANICAL PROPERTIES
% Cold deformation | Yield strength psi | Tensile strength psi | % Elongation(10” gauge length) |
| 0% | 45,000 | 91,000 | 42% |
| 20% | 110,000 | 123,000 | 8% |
| 37% | 145,000 | 160,000 | 2.50% |
| 50% | 161,000 | 176,000 | 2.20% |
| 60% | 170,000 | 191,000 | 2.10% |
| 68% | 176,000 | 203,000 | 2.50% |
| 75% | 191,000 | 218,000 | 2.60% |
| 80% | 186,000 | 217,000 | 2.60% |
| 84% | 202,000 | 227,000 | 2.60% |
| 90% | 205,000 | 238,000 | 2.60% |
| 93% | 212,000 | 239,000 | 2.60% |
| 95% | 213,000 | 246,000 | 2.80% |
The values are typical and do not represent all diameters. Test methods affect results
11 SURFACE CONDITION
Stainless steels develop a highly polished appearance as they are drawn to fine diameters. Surface roughness can be less than 5 RMS when processed using single crystal natural diamond dies and measured with a profilometer. Diameters over 1.0mm are finished with polycrystalline dies and exhibit a rougher surface than natural diamond dies. Diameters over 2.50mm will have an even rougher surface because they are drawn with carbide dies. Additional finish treatments can enhance the surface of the products.
12 QUALITY ASSURANCE
(1) Eddy Current Testing Machine (ET)
(2) Ultrasonic Testing Machine (UT)
(3) MPI
(4) Spectromax
(5) Tensile strength tester
(6) Sclerometer
(7) Metallography System (including Microscope and relevant Analyzer)
(8) Inter Granular Corrosion Testing
(9) VI
(10) Shape and dimension
13 BUSINESS TERM
| Minimum order quantity | Negotiable |
| Price | Negotiable |
| Packaging details | Water prevent, seaworthy transport, plastic box |
| Mark | As per order |
| Delivery time | 60-90 days |
| Payment terms | T/T, L/C at sight, D/P |
| Supply ability | metric tons / Month |
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