4140 alloy steel bolts exporter for High-Strength Industrial Fastening
XZ Fastener exports 4140 alloy steel bolts for machinery, tooling, heavy equipment, automotive fixtures, construction hardware, mining equipment, and high-load industrial assemblies. Products can be supplied as hex bolts, socket head bolts, flange bolts, shoulder bolts, structural bolts, studs, and made-to-drawing bolts according to order requirement. Buyers can specify AISI 4140 or equivalent grade, heat treatment, property class, thread, length, finish, export packaging, inspection level, and shipment terms. 4140 alloy steel bolts can also be shipped with nuts, hardened washers, spacers, anchors, and related fastener products.
Quick Specs
What Buyers Should Know Before Sourcing 4140 Alloy Steel Bolts
4140 alloy steel bolts are usually selected when the assembly needs higher strength, better toughness, and more stable heat-treatment response than standard carbon steel bolts. Buyers should confirm material equivalency, heat treatment, tensile requirement, hardness range, thread tolerance, surface finish, export packing, and whether the bolts will be used with hardened washers or high-strength nuts.
For standard hex bolt comparisons, buyers often review DIN 933 full thread hex bolts and Grade 8.8 carbon steel hex bolts. For non-standard head dimensions, special shank length, export labels, or customer drawings, XZ Fastener can support custom fasteners.
Common Purchasing Descriptions
- 4140 alloy steel hex bolts, quenched and tempered, black oxide finish, metric coarse thread.
- AISI 4140 socket head bolts, full thread, plain oiled, packed by part number.
- 42CrMo4 high-strength bolts according to drawing, hardness and dimension report available upon request.
- SCM440 flange bolts, zinc plated, supplied with matching nuts and hardened washers.
- Custom 4140 alloy steel shoulder bolts with controlled shank diameter and heat treatment.
- Export order including 4140 alloy steel bolts, DIN 933 full thread hex bolts, Grade 8.8 carbon steel hex bolts, metric hex head bolts, zinc plated DIN 933 bolts, black oxide DIN 933 bolts, and hot dip galvanized DIN 933 bolts.
Detailed Specifications Table
| Предмет | Typical Options | Buyer Notes |
|---|---|---|
| Тип продукта | Hex bolt, socket head bolt, flange bolt, shoulder bolt, stud bolt, structural bolt, custom bolt | Confirm head style, thread length, shank diameter, and assembly clearance before quotation. |
| Стандарты | DIN 931, DIN 933, DIN 912, ISO 4014, ISO 4017, ISO 4762, ANSI, ASTM, ASME, JIS, GB | Provide standard number, diameter, length, thread pitch, and mechanical requirement. |
| Материал | AISI 4140, 42CrMo, 42CrMo4, SCM440, or equivalent alloy steel | Equivalent grades should be confirmed before production when the drawing names a specific standard. |
| Strength | Grade 8.8, 10.9, 12.9, or buyer-defined tensile and hardness requirement | Final class depends on material condition, heat treatment, size, and standard requirement. |
| Heat Treatment | Quenched and tempered, normalized, stress relieved, or according to drawing | Define hardness range, tensile requirement, or proof load requirement when applicable. |
| Thread | Metric coarse, metric fine, UNC, UNF, full thread, partial thread, custom thread | Thread tolerance and thread length should be checked with mating nuts or tapped holes. |
| Обработка поверхности | Plain oiled, black oxide, zinc plated, phosphate, Geomet type coating, custom coating | High-strength plated bolts may require hydrogen embrittlement relief according to order requirement. |
| Manufacturing Method | Cold heading, hot forging, CNC machining, thread rolling, heat treatment, coating, sorting | Large size, small batch, or precision shank bolts may require machining or hot forging. |
| Export Packing | Bulk carton, inner bag, wooden case, part-number label, pallet packing, moisture protection | Heavy bolts should be packed with suitable carton weight limits and pallet protection. |
| Inspection | Dimension check, thread gauge, hardness check, tensile or proof load test, coating check, visual sorting | Inspection reports can be prepared according to order requirement. |
For made-to-drawing parts, buyers can prepare material, hardness, and heat-treatment notes with XZ Fastener’s guide to made-to-drawing fastener material requirements.
Material and Grade Explanation
4140 is a chromium-molybdenum alloy steel commonly selected for strength, toughness, and heat-treatment response. Equivalent or related grades such as 42CrMo, 42CrMo4, and SCM440 may be reviewed according to drawing requirement and buyer approval. Compared with ordinary medium carbon steel, 4140 can provide better hardenability for larger or higher-load bolts.
Buyers should define the final mechanical target rather than only naming the material. Tensile strength, hardness range, proof load, impact requirement, and operating temperature may affect the suitable heat-treatment condition. XZ Fastener can review raw material inspection requirements before production when traceability is needed.
Surface Finish Selection Guide
- Plain oiled: Common for indoor storage, machining parts, and buyer-controlled finishing.
- Black oxide: Often selected for tooling, machinery, fixtures, and indoor high-strength bolts.
- Zinc plated: Used for general corrosion resistance, with relief treatment considered for high-strength items.
- Phosphate and oil: Suitable for selected mechanical assemblies requiring a darker, oil-retaining surface.
- Geomet type coating: Available upon request for selected corrosion resistance and hydrogen embrittlement control needs.
- Hot dip galvanizing: Can be reviewed for some larger bolts, but thread fit and mechanical requirements must be confirmed first.
Manufacturing and Quality Control
4140 alloy steel bolt production can include bar or wire material preparation, cold heading, hot forging, CNC machining for special shapes, thread rolling, heat treatment, surface finishing, sorting, and export packing. Important control points include material confirmation, head dimensions, thread fit, straightness, heat-treatment uniformity, hardness, tensile or proof load requirement, coating condition, and package protection.
XZ Fastener checks production dimensions, thread gauges, hardness, surface appearance, packing labels, and inspection documents according to the purchase order. Buyers can review XZ Fastener’s fastener quality control notes when preparing inspection requirements for 4140 alloy steel bolts.
Приложения
Heavy Machinery
Used in equipment frames, gearboxes, presses, mounting blocks, fixtures, and high-load service parts.
Tooling and Molds
4140 bolts can be specified for tooling plates, clamping fixtures, and assemblies requiring strength and toughness.
Automotive Fixtures
Used in brackets, jigs, repair hardware, and performance-related assemblies according to design requirement.
Mining and Energy Equipment
Suitable for selected harsh-duty equipment where alloy steel strength and heat treatment are required.
Construction Hardware
Can be reviewed for heavy brackets, base plates, support frames, and engineered bolted joints.
Export Assembly Kits
4140 bolts can be shipped with matching nuts, washers, spacers, labels, and inspection documents.
How to Get a Faster Quotation
For standard 4140 alloy steel bolts, send the standard number, bolt type, diameter, length, thread pitch, thread length, material grade, heat treatment, finish, quantity, export packaging method, shipment terms, and inspection requirement. For custom bolts, include a drawing, sample photo, head dimensions, shank diameter, shoulder length, thread tolerance, hardness range, tensile requirement, and assembly purpose.
For complete assembly orders, list matching nuts, washers, packaging labels, carton weight limits, pallet requirements, and inspection documents. Buyers can contact XZ Fastener with drawings and order details for review.
Часто задаваемые вопросы
Can XZ Fastener export 4140 alloy steel bolts according to drawings?
Yes. 4140 alloy steel bolts can be supplied according to drawings, samples, or detailed size lists. Please provide material grade, dimensions, thread, heat treatment, finish, quantity, packaging, inspection requirements, and shipment details.
What equivalent materials can be reviewed for AISI 4140 bolts?
Depending on the drawing and buyer approval, equivalent or related materials such as 42CrMo, 42CrMo4, and SCM440 can be reviewed. Final material confirmation should be made before production.
Can 4140 alloy steel bolts be supplied as Grade 10.9 or 12.9?
Grade 10.9 or 12.9 requirements can be reviewed according to bolt size, material condition, heat treatment, and applicable standard. Buyers should specify tensile, proof load, and hardness requirements when needed.
Which finishes are available for 4140 alloy steel bolts?
Common finishes include plain oiled, black oxide, zinc plated, phosphate, and selected corrosion-resistant coatings. For high-strength plated bolts, hydrogen embrittlement relief should be considered according to order requirement.
Can 4140 alloy steel bolts be exported with nuts and washers?
Yes. 4140 alloy steel bolts can be packed with matching nuts, hardened washers, flat washers, spacers, anchors, and other hardware. Please provide the full assembly list, finish, quantity, export packing method, and shipment details.
What inspection items are common for 4140 bolts?
Common inspection items include material confirmation, dimensions, thread gauge, hardness, visual appearance, coating check, and mechanical testing when required by the order or drawing.
Send Your 4140 Alloy Steel Bolt Export Inquiry
For a faster quotation, send your size list, standard number, material grade, heat treatment, finish, quantity, packaging method, inspection requirements, and shipment terms. If available, include drawings, samples, assembly photos, mating nut and washer details, labels, or part numbers so XZ Fastener can check the production route and export packing plan.
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