Stainless Steel Hex Bolt SS316 — DIN 933 A4-80

Description

1. Product Overview

Stainless Steel Hex Bolt SS316 — DIN 933 A4-80 is a high-grade, fully-threaded hex head bolt manufactured to DIN 933 specifications using A4 (SS316) stainless steel. It is designed for demanding industrial fastening applications where corrosion resistance, mechanical strength, and long-term reliability are critical. The bolt delivers a balanced combination of tensile performance (A4-80 strength class) and pitting resistance in chloride-prone or marine environments, making it strategically important for infrastructure, chemical processing, and offshore projects. For procurement teams, this product represents a low-risk, long-life fastening solution that reduces maintenance cycles and total cost of ownership.

2. Key Specifications & Technical Characteristics

• Material: Austenitic stainless steel, Grade A4 / SS316 (UNS S31600)

• Chemical composition: Approx. 16–18% Cr, 10–14% Ni, 2–3% Mo, balance Fe, trace Mn, Si, C ≤ 0.08% (meets EN/ISO composition ranges)

• Mechanical grade/class: A4-80 (equivalent to 80 MPa nominal yield class per DIN/ISO fastener standards; characteristic tensile strength ~800 MPa class reference)

• Thread standard: Fully threaded per DIN 933 specification (metric coarse threads unless specified)

• Surface finish: Mill passivated; optional electropolish or bright finish on request

• Corrosion resistance: High resistance to pitting and crevice corrosion in chloride environments (typical SS316 performance)

• Dimensional tolerance: Manufactured to DIN/ISO tolerance classes for threaded fasteners (tolerance class 6g unless specified)

• Physical appearance: Metallic silver, smooth machined hex head, fully threaded shank

• Size range: Available in standard metric diameters (M5–M36) and custom lengths per order

• Density: ~8.0 g/cm³ (material density for SS316)

• Packaging options: Bulk palletized (cardboard box + pallet), wooden crate for heavy loads, plastic-coated pallet wraps; individual bags or labelled boxes available for traceability

• Shelf life: Indefinite under normal storage (dry, non-corrosive indoor conditions); maintain in original packaging to prevent surface contamination

• Traceability: Batch/lot marking and certificates of conformity (CoC) or test reports (material certificates EN 10204 2.1 / 3.1 available on request)

3. Core Industrial Applications

• Primary industries: Oil & gas (onshore & offshore), marine and shipbuilding, chemical and petrochemical plants, water treatment and desalination, power generation, civil engineering, heavy machinery, and infrastructure projects.

• Specific use cases: Structural bolting in corrosive coastal or offshore platforms, pipe supports and flanges in chemical plants, marine deck and hardware assembly, fastening of heat exchangers and process vessels, long-life external fixtures in civil and infrastructure installations.

• Why it outperforms alternatives: SS316 A4-80 combines higher corrosion resistance (especially against chlorides) than SS304 and superior mechanical strength relative to lower-grade stainless fasteners. Compared with coated carbon steel bolts, it eliminates recurring repainting and galvanic corrosion concerns, reducing maintenance and lifecycle costs. Its conformity to DIN 933 ensures interchangeability and predictable assembly performance across international projects.

• Operational advantages: Reduced downtime from corrosion-induced failures, longer maintenance intervals, compatibility with standard metric tooling, and consistent torque-tension relationships for reliable preload control.

4. Competitive Advantages

• Quality consistency: Manufactured to DIN/ISO standards with controlled chemistry and mechanical testing; batch traceability and certificate options (EN 10204) ensure specification compliance.

• Supply reliability: Production capacity aligned for bulk industrial procurement; forward-stock programs and contract allocations available for strategic buyers.

• Logistics capability: Palletized and container-ready packaging, export documentation support (commercial invoice, packing list, certificates), and consolidated shipping to major ports; flexible shipping schedules to support project timelines.

• Price competitiveness: Economies of scale on bulk MOQ enable competitive unit pricing versus small-lot suppliers; transparent pricing tiers tied to volume bands.

• Sustainability: Long service life reduces replacement frequency and material consumption; stainless steel is fully recyclable and supports circular-material procurement policies.

• Technical support: Dedicated technical datasheets, torque guidance, installation best-practices, and engineering consultation available to support specification, procurement, and installation decisions.

5. Commercial & Supply Information

• Minimum order quantity (MOQ): BULK 20 MT

• Loading capacity (MT per container): Typical 20 ft container capacity ~20–22 MT, 40 ft container capacity ~24–26 MT depending on packaging and load plan (final loading confirmed at order stage)

• Lead times: Subject to order size and current production schedule; standard lead times for bulk orders provided on request with firm delivery quotes

• Certifications: Material certificates (EN 10204 2.1/3.1), manufacturing to DIN 933, and optional third-party inspection available

• Ordering options: Standard stock sizes available for immediate dispatch; custom sizes, finishes, or certified test packages available under contract