Certified Medical-Grade
Surgical Stainless Steel
True precision starts at the atomic level. Sialcraft utilizes certified AISI 410, 420, 440, and Tungsten Carbide alloys imported from Japan and Germany to support long edge retention, strong corrosion resistance, and biocompatibility.
AISI 420 Martensitic Steel
Contains 0.15%-0.40% carbon and 12-14% chromium. Heat treated to 50-54 HRc hardness. Used in premium Kelly forceps, Mayo scissors, and heavy-duty bone rongeurs for optimal edge retention and corrosion resistance.
AISI 440 High-Hardness Steel
Contains 0.60%-1.20% carbon and 16-18% chromium. Reaches 56-60 HRc hardness. Reserved for micro-scissors, osteotomes, and delicate dissection scalpels requiring extreme sharpness.
AISI 410 Martensitic Steel
Contains 0.15% carbon max and 11.5-13.5% chromium. Heat treated to 40-45 HRc. Provides optimal tensile flexibility for self-retaining abdominal retractors, speculums, and dilators.
Tungsten Carbide (TC) Inserts
Welded to the inner jaws of needle holders and cutting edges of premium scissors. Achieves 70+ HRc equivalent hardness for extended wear under heavy clinical use.
ASTM F899 Stainless Steel Comparison
Engineering parameters for martensitic surgical steels utilized in Sialkot manufacturing.
| Material Grade | Carbon % | Chromium % | Hardness (HRc) | Corrosion Resistance | Primary Application |
|---|---|---|---|---|---|
| AISI 410 | 0.15% Max | 11.5% - 13.5% | 40 - 45 HRc | Very Good | Self-retaining retractors, speculums, handles |
| AISI 420 | 0.15% - 0.40% | 12.0% - 14.0% | 50 - 54 HRc | Excellent | Kelly forceps, Adson forceps, Mayo scissors |
| AISI 440 | 0.60% - 1.20% | 16.0% - 18.0% | 56 - 60 HRc | Superior | Micro-scissors, osteotomes, scalpel blades |
| Tungsten Carbide | N/A (Cermet) | Cobalt Matrix | 70+ HRc | Extreme | Needle holder jaw inserts, gold-handle scissors |
Surgical Steel Technical Answers
Review Certified Material Specs
Source ASTM F899 compliant instruments direct from Sialkot's premier manufacturing facility with complete mill test certification.
Technical Guides for Procurement Teams
Surgical Steel Grades Compared: AISI 410, 420, 440 and 316L
Which stainless steel for which surgical instrument - AISI 410, 420, 440 and 316L compared on hardness, corrosion resistance, heat treatment and application.
ASTM F899 & ISO 7153-1 Surgical Stainless Steel Standards: Metallurgy Guide for Importers
Comprehensive metallurgical reference guide detailing chemical composition, AISI 410 / 420 / 440 / 316L / TC / 17-4 PH alloys, Rockwell hardness ranges (40-60 HRc), chemical passivation, and mill test certificates.
Modern Sialkot Surgical Manufacturing: 5-Axis CNC, Cleanrooms, and the EU MDR Revolution
Inside modern Sialkot medical device factories: 5-axis wire-EDM, automated vacuum heat treatment, cleanrooms, and the shift toward EU MDR-aligned quality systems.