Stainless Steel 446 Nuts Manufacturer

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Sachiya Steel International is One Of The Leading Manufacturer And Exporter Of High Quality Stainless Steel 446 Nuts And Bolts, which is available in different shapes and sizes at reasonable price to our customers. At the solution treating temperature, 1900 Degree F, Stainless Steel 446 Hex Head Bolts is austenitic but undergoes transformation to a low – carbon martensitic structure during cooling to room temperature. When frequent thermal cycling is involved, Stainless Steel 446 Hex Head Nuts is resistant to about 1850 Degree F, where this transformation is not complete until the temperature drops to 90 Degree F.

Stainless Steel 446 Nuts

    Stainless Steel 446 Nuts

The high chromium and relatively low nickel content of Stainless Steel 446 Square Bolts provide good resistance to high temperature Sulphur bearing atmospheres. Stainless Steel 446 Square Nuts has only moderate resistance to carbon absorption and is not suggested for use in highly carburizing atmospheres. Prolonged exposure to the 1100 Degree F – 1600 Degree F temperature range in Stainless Steel 446 Eye Bolts will cause some sigma to form, lowering room temperature ductility and impact resistance.

Because Stainless Steel 446 Eye Nuts is an air hardening steel, it must be given a high preheat, at least 350 Degree F – 400 Degree F before welding, and immediately given a full anneal before the weldment cools. Otherwise Stainless Steel 446 U-Bolts will harden, and cracking is likely, where this hardening treatment also tempers the martensitic structure, increasing ductility and toughness.

SS 446 Bolt/Nut Specifications
Specifications : ASTM A 193 ASME SA 193
Standard : DIN, ASTM, BS and all International Standards
Length : 3 mm to 200 mm
Size : M3 – M56 | 3/6″ to 2″ | Custom Sizes
Type : Hex Head Bolts, Square Bolts, U bolts, Eye bolts, T bolt, Hex Bolt, Lag Bolts, Counter sunk Bolts, Hex Head nuts, Square nuts, Lock nuts, Eye nuts, wing nuts, T nuts, Panel Nuts, Coupling Nuts, Dome nuts, Acorn Nuts.
446 Stainless Steel Bolt/Nut Chemical Composition
Grade C Mn Si P S Cr Mo Ni N
446 min. 23.0 0.10
max. 0.2 1.5 0.75 0.040 0.030 30.0 0.50 0.25
Stainless Steel 446 Bolt/Nut Mechanical Properties
Grade Tensile Strength (MPa) min Yield Strength 0.2% Proof (MPa) min Elongation (% in 50mm) min Hardness
Rockwell B (HR B) max Brinell (HB) max
446 485 275 20 92 201
Stainless Steel 446 Bolt/Nut Physical Properties
Grade Density (kg/m3) Elastic Modulus (GPa) Mean Coefficient of Thermal Expansion (m/m/0C) Thermal Conductivity (W/m.K) Specific Heat 0-1000C (J/kg.K) Electrical Resistivity (n.m)
0-1000C 0-3150C 0-5380C at 1000C at 5000C
446 7750 200 9.9 11.4 11.6 24.9 28.7 460 570
Equivalent Grades for 446 Stainless Steel Bolt/Nut
Grade UNS No Old British Euronorm Swedish SS Japanese JIS
BS En No Name
446 S44600 1.4762 / 1.4763
SS 446 Bolt/Nut Application Industries
  • Off-Shore Oil Drilling Companies
  • Power Generation
  • Petrochemicals
  • Gas Processing
  • Specialty Chemicals
  • Pharmaceuticals
  • Pharmaceutical Equipment
  • Chemical Equipment
  • Sea Water Equipment
  • Heat Exchangers
  • Condensers
  • Pulp and Paper Industry
446 Steel Bolt/Nut Test Certificates

We at Sachiya Steel International provide Manufacturer TC (Test Certificate) in accordance to EN 10204/3.1B, Raw Materials Certificate, 100% Radiography Test Report, Third Party Inspection Report. We also provide Standard certificates like EN 10204 3.1 and additional requirement like. NACE MR 01075. FERRIT CONTENT as per norms if requested by clients.

• EN 10204/3.1B,
• Raw Materials Certificate
• 100% Radiography Test Report
• Third Party Inspection Report, etc

Material Testing

We at Sachiya Steel International ensure that all our materials go through strict quality tests before dispatching them to our clients.

• Mechanical Testing Such as Tensile of Area
• Hardness Test
• Chemical Analysis – Spectro Analysis
• Positive Material Identification – PMI Testing
• Flattening Test
• Micro and Macro Test
• Pitting Resistance Test
• Flaring Test
• Intergranular Corrosion (IGC) Test


• Commercial Invoice which includes HS Code
• Packing List including net weight and gross weight, number of boxes, Marks and Numbers
• Certificate of Origin legalized/attested by Chamber of Commerce or Embassy
• Fumigation Certificates
• Raw Material Test Reports
• Material Traceability Records
• Quality Assurance Plan (QAP)
• Heat Treatment Charts
• Test Certificates certifying NACE MR0103, NACE MR0175
• Material Test Certificates (MTC) as per EN 10204 3.1 and EN 10204 3.2
• Guarantee Letter
• NABL approved Laboratory Test Reports
• Welding Procedure Specification/Procedure Qualification Record, WPS/PQR
• Form A for the purposes of the Generalized System of Preferences (GSP)

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