Stainless Steel
From Medical Alloys
The reason why designated as 316LVM is that the Iron based-18Chromium-14Nickel-3Molybdenum alloy is 316L,a low-carbon variety of 316,which has been vacuum melted to improve purity and cleanliness,meanwhile resulting in a more consistent medical grade austenitic stainless steel. Because of its excellent corrosion resistance,316LVM is widely used for surgical implants(both temporary and permanent)and instruments,medical devices and equipment.
Standard Specification:
- ISO 5832-1:1997 composition”D”: wrought 18Cr-14Ni-3Mo for surgical implants
- GB 4234-2003 composition'S31723': 18Cr-14Ni-3Mo for surgical implants
- ASTM F138: wrought 18Cr-14Ni-2.5Mo bar and wire for surgical implants
- ASTM F139: wrought 18Cr-14Ni-2.5Mo sheet and Strip for surgical implants
- ASTM F899: wrought stainless steel for surgical instruments
Main Advantages:
- Low C → better corrosion resistance;
- Vacuum Melt → better general and integranular corrosion resistance;
- High Cr → better corrosion resistance;
- High Ni → higher strength;
- High Mo → better general and integranular corrosion resistance;
Condition:
- Annealed → better ductility;
- Cold Worked → better corrosion resistance;
Details
Chemical composition:
Fe | Cr | Ni | Mo | Mn | Si | Cu | N | C | S | P | Residuals |
balance | 17~19 | 13~15 | 2.25~3.5 | 2 | 1 | 0.5 | 0.1 | 0.03 | 0.01 | 0.025 | 0.4 |
Tolerance: h7-h11(on request).
Melt method: vacuum melting.
Available product forms:
- wire (coil & straight): D(0.2-5)mm;
- round bar (bright surface): D(0.8-25)mm;
- flat bar: 8*12mm;8*14mm;10*10mm;10*12mm;10*16mm;12*12mm;
- triangle bar: D 2.0mm, D 2.5mm, D 3.0mm, D 3.5mm;
- hexagonal bar: D(5.0~14)mm;
- strip & sheet: T(0.8-8)mm*W205mm;
- plate & profile: 3.2*12mm; 4.2*14mm; 5.2*17.6mm; 6.5*18mm;
- curve plate: 3.2*12mm; 4.2*14mm; 5.2*17.6mm; 6.5*18mm;
- seamless tube: OD*ID=7*2mm; 8*1.6mm; 8*2mm; 8*2.5mm; 9.5*4mm;
- 10.2*3mm; 12*3mm; 12.5*5mm; 13*4.6mm; 13*6mm; 13*8mm; 14*3mm;
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