Typical MOQ
10pieces
Subject to product and material review.
Conditions
MOQ is typically 10 pieces, subject to product, material and manufacturing-route review.
Duplex 2205 Hex Bolts — ASTM A1082/A1082M
MaterialDuplex 2205Change · 45 grades
- Material
- Duplex 2205 · UNS S31803 / S32205
- Material focus
- High strength · chloride corrosion resistance
- Common applications
- Process equipment · marine components
- Main elementsComposition limits · wt.% · S32205
- Cr 22–23%
- Ni 4.5–6.5%
- Mo 3.0–3.5%
- N 0.14–0.20%
Standards & threads
Finished boltASTM A1082/A1082MS31803 / S32205 · special-purpose bolting
Specify the exact UNS and condition; include A962/A962M common requirements. Inch and metric designations are separate order choices, not mixed unit tables.
Specify the A1082 UNS and ordered strength / treatment condition. “2205” alone does not define the bolting acceptance.
Raw material specificationASTM A276/A276M / ASTM A479/A479MUNS S31803 / S32205
S31803 / S32205 · stainless bar
State which UNS is required and the solution-treated condition; dual certification requires evidence for both designations.
Dimensions · metricISO 4014 / ISO 4017Coarse pitch · partial-thread bolts / full-thread hex screws
Dimensions · inchASME B18.2.1Inch hex bolts / hex cap screws
Select the bolt or cap-screw pattern, head dimensions and thread length. Hex and heavy hex are different choices.
Threads · metricISO 261 / ISO 965-1Metric M · pitch plan and tolerance system
Threads · UNC / UNFASME B1.1Unified inch · coarse / fine series
State diameter, TPI, series and external class: e.g. 1/2-13 UNC-2A or 1/2-20 UNF-2A. Select 2A / 3A with the mating-thread fit; UNC and UNF do not mate.
Sources & editions Reviewed 2026-10-19
Historical samples support the stated grade coverage. The ordered edition controls the full requirements.
Preview your dimensions
Example dimensions, not a stock size.
Simplified right-hand thread appearance. No tolerance, fit or standard compliance is simulated.
Head dimensions · optional
Head proportions are illustrative: s = 1.5d, k = 0.625d. They are not standard-table values and will not be submitted as specified dimensions.
Quality documents
Heat number traceability
Every delivery traceable by heat number
Mechanical testing
Included with every delivery
Thread inspection
GO / NO-GO gauging · sampled inspection
Methods, sampling and acceptance criteria follow the agreed specification. PMI, third-party inspection and additional records are agreed separately.
Before production and at delivery
During quotation, a redacted certificate from a previous order can show the document format and recorded tests. It is a historical example, not certification of this product or a new order. Shipment documents must correspond to the material and batch actually supplied.
How to read a historical certificate sample ↗Prepare your enquiry
Send a drawing and quantity.
No drawing? Use these details.
- Size
- d × L Diameter × under-head length
- Quantity
- Pieces Required quantity per size
- Thread
- Metric / UNC / UNF Pitch or TPI + thread class
- Coverage
- Full / Partial For partial, include threaded length
Full material checklist
UNS & certificate scope
S31803 or S32205; if both are required, state dual certification and the applicable material specification.
The heat certificate must substantiate the requested designation or designations.
Corrosion & joint context
Medium, chloride exposure, operating temperature, crevice conditions and mating-component materials.
Enables a useful comparison with 316L or 2507 without assuming universal chloride suitability.
Product acceptance
Material condition, finished-bolt properties, thread class and any project-required corrosion or microstructure testing.
ASTM A276 covers bar and shapes; project and finished-fastener acceptance still need definition.
Commercial terms
Indicative terms; confirmed in your quotation.
Sample review
~20days
Freight, import duties and taxes are separate.
Conditions
Samples are typically reviewed on an approximately 20-day basis. BYBOLT may cover agreed sample manufacturing; buyer freight, import duties and taxes remain separate.
Production review
25–35days
Urgent requirements can be discussed.
Conditions
Regular production is commonly reviewed on a 25–35 day basis. Urgent requirements can be discussed against the complete specification.
Typical deposit
30%
T/T or LianLian. Balance before dispatch.
Conditions
Payment can be arranged by T/T or LianLian. A typical order uses a 30% deposit, with the balance completed before dispatch.
Technical help
Should I order S31803 or S32205 for 2205 bolts?
Use the UNS designation required by the drawing or project. If dual certification is requested, the records must demonstrate both sets of requirements. The commercial name 2205 alone does not establish which designation is being supplied.
Which standard addresses finished 2205 bolting?
A1082/A1082M includes a special-purpose bolting route for S31803 and S32205, with A962/A962M common requirements. State the UNS and required condition; A276/A479 stock certification remains a separate part of the order.
Read a thread designation Metric / UNC / UNF
M12 × 1.75–6g12 mm diameter · 1.75 mm pitch · external class 6g
1/2-13 UNC-2A1/2 inch · 13 TPI · coarse · external class 2A
1/2-20 UNF-2A1/2 inch · 20 TPI · fine · external class 2A
Examples explain designations, not available sizes. Specify fine pitch explicitly. UNC and UNF do not mate; full or partial threading is a separate choice.
Thread classes and inspection ↗Related material guides
Download the PO and receiving checklist (PDF)
Guides for your enquiry
Specify your Duplex 2205 bolt
Send a drawing or add your dimensions and quantity.
Continue to enquiry ↗
Combine several products in one enquiry
Duplex 2205 hex boltsEnquire ↗