Sachiya Steel International is One Of The Leading Manufacturer And Exporter Of High Quality Stainless Steel 304H Nuts And Bolts , which is made by selective alloying with manganese and nitrogen and may have a reduced tendency to gall. When parts of Stainless Steel 304H Hex Head Bolts are forced together, the oxide layer can be scraped off, allowing the parts to weld together. When forcibly disassembled, the welded Stainless Steel 304H Hex Head Nuts may be torn and pitted, a destructive effect known as galling. Galling in Stainless Steel 304H Square Bolts can be avoided by the use of dissimilar materials for the parts forced together, for example bronze or even different types of steels (martensitic against austenitic).
However, Stainless Steel 304H Square Nuts is electrically connected in a humid, even mildly acidic environment may act as a voltaic pile and corrode faster. Additionally, threaded joints in Stainless Steel 304H U-Bolts may be lubricated to provide a film between the two parts and prevent galling. Low – temperature carburizing is another option that virtually eliminates galling in Stainless Steel 304H Lock Nuts and allows the use of similar materials without the risk of corrosion and the need for lubrication.
The layer in Stainless Steel 304H Eye Bolts is impervious to water and air, protecting the metal beneath, and this layer quickly reforms when the surface is scratched. This phenomenon in Stainless Steel 304H Eye Nuts is called passivation and is seen in other metals, such as Aluminium and titanium.
SS 304H Bolt/Nut Specifications |
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| 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. |
304H Stainless Steel Bolt/Nut Chemical Composition
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N |
| 304H | 0.04-0.10 | 2.0 max | 0.75 max | 0.045 | 0.030 | 18.0-20.0 | – | 8.0-10.5 | – |
Stainless Steel 304H 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 | Hardness Brinell (HB) max |
| 304H | 515 | 205 | 40 | 92 | 201 |
Stainless Steel 304H Bolt/Nut Physical Properties
| Grade | Density (kg/m3) | Elastic Modulus (GPa) | Mean Coefficient of Thermal Expansion (m/m/°C) | Thermal Conductivity (W/m.K) | Specific Heat 0-100°C (J/kg.K) | Electrical Resistivity
(n.m) |
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|---|---|---|---|---|---|---|---|---|---|
| 0-100°C | 0-315°C | 0-538°C | at 100°C | at 500°C | |||||
| 304H | 8000 | 193 | 17.2 | 17.8 | 18.4 | 16.2 | 21.5 | 500 | 720 |
Equivalent Grades for 304H Stainless Steel Bolt/Nut
| AISI Grade Equivalent | JIS Equivalent | Stainless Steel Notation | EN/DIN Numerical Equivalent | UNS designation |
EN/DIN Symbolical Equivalent |
| AISI 304H | SUS304H | SS 304H | EN 1.4948 | UNS S30409 | X2CrNiN18-10 |
SS 304H 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
304H 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
Documentation
• 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)