35CrMo alloy steel fasteners factory
XZ Fastener supplies 35CrMo alloy steel fasteners for buyers who need higher strength, controlled heat treatment, and stable mechanical performance in machinery, construction equipment, tooling, mining, and heavy assembly projects. 35CrMo is commonly selected when ordinary carbon steel is not enough for fatigue resistance, impact load, or demanding tightening conditions. Products can be supplied as bolts, studs, nuts, screws, washers, and made-to-drawing parts according to order requirement. Buyers can review related fastener products to match standard items with customized sizes before sending a purchase inquiry.
Quick Specs
What Buyers Should Know Before Sourcing 35CrMo Alloy Steel Fasteners
35CrMo fasteners are usually chosen for assemblies that require a stronger material base than low carbon steel. Before sourcing, confirm whether the part is a standard fastener or a drawing-controlled component. Diameter, thread pitch, thread length, tolerance, heat treatment condition, hardness range, and surface finish all affect production route and price.
For non-standard heads, shoulders, extended threads, fine pitch threads, drilled holes, or special markings, XZ Fastener can review custom fasteners based on drawings, samples, or clear dimensional specifications.
Common Purchasing Descriptions
- 35CrMo alloy steel hex bolts, quenched and tempered, black oxide finish.
- 35CrMo studs with coarse or fine metric thread, supplied according to drawing.
- DIN 933 full thread hex bolts in alloy steel for high-load machinery assemblies.
- Grade 8.8 carbon steel hex bolts when medium strength is enough for the application.
- Metric hex head bolts, socket head screws, nuts, and washers packed by size and batch.
- Zinc plated DIN 933 bolts, black oxide DIN 933 bolts, and hot dip galvanized DIN 933 bolts for different corrosion and handling conditions.
Detailed Specifications Table
| Item | Available Options | Buyer Notes |
|---|---|---|
| Product Type | Hex bolts, socket screws, studs, nuts, washers, pins, shafts, and special fasteners | Send drawings for non-standard geometry or controlled tolerances. |
| Material | 35CrMo alloy steel, alternative alloy grades available upon request | Equivalent material should be confirmed by chemical composition and mechanical requirement. |
| Diameter Range | Metric and inch sizes can be reviewed according to product type | Large diameters may require separate confirmation for heat treatment uniformity. |
| Thread | Metric coarse, metric fine, UNC, UNF, full thread, partial thread | Thread gauge and pitch requirement should be stated on the inquiry. |
| Heat Treatment | Quenching and tempering, hardness range according to order requirement | Provide target strength class, hardness, or tensile requirement when specified. |
| Surface Finish | Plain oil, black oxide, zinc plated, phosphate, Geomet, Dacromet, hot dip galvanized | Finish selection should match corrosion exposure, assembly torque, and appearance needs. |
| Inspection | Dimensional check, thread check, hardness, tensile, coating thickness, visual inspection | Third-party inspection or special reports can be discussed before order confirmation. |
| Packing | Bulk cartons, small boxes, pallets, labels, mixed-size packing | Export packing and label content can be arranged according to order requirement. |
Material and Grade Explanation
35CrMo is a medium carbon chromium-molybdenum alloy steel widely used for parts that need strength after heat treatment. Compared with ordinary carbon steel, it can provide improved hardenability and load-bearing performance when the heat treatment process is properly controlled.
For international projects, buyers should not assume that material names are automatically interchangeable. If an equivalent grade is required, send the standard, chemical composition, mechanical properties, and inspection method. Related technical guides can help purchasing teams prepare clearer specifications before ordering.
Surface Finish Selection Guide
- Plain oil: suitable for indoor storage or parts that will be further processed by the buyer.
- Black oxide: common for machinery fasteners where a dark finish and light oil protection are acceptable.
- Zinc plated: used for general corrosion resistance and clean appearance in dry environments.
- Phosphate: often selected for controlled friction, oil retention, or assembly conditions.
- Geomet or Dacromet: considered when higher corrosion resistance is needed without traditional electroplating.
- Hot dip galvanized: used for outdoor steel structures, with thread fit and coating thickness reviewed before production.
Manufacturing and Quality Control
Production Review
Production starts from material confirmation, drawing review, tooling check, forming or machining method selection, thread processing, heat treatment, surface finishing, and packing arrangement. For critical alloy steel orders, the heat treatment route and inspection points should be agreed before mass production.
Buyers who need stronger traceability can discuss raw material inspection, batch control, and document requirements before placing an order.
Inspection Points
Common checks include size measurement, thread gauge inspection, head dimension verification, hardness test, tensile test when required, coating thickness, surface appearance, marking, quantity, and packing labels. Inspection content can be adjusted according to product risk and buyer requirements.
For more detail on process control, review XZ Fastener’s article about manufacturing quality control.
Applications
Heavy Machinery
Used in equipment frames, gear housings, lifting components, and assemblies exposed to repeated load.
Mining Equipment
Suitable for high-load fastening positions where impact, vibration, and maintenance cycles must be considered.
Tooling and Fixtures
Applied in clamping systems, dies, molds, and fixtures that need reliable thread engagement.
Automotive and Transport
Used for brackets, chassis-related assemblies, and mechanical systems when the drawing specifies alloy steel.
Energy Projects
Selected for equipment bases, power transmission components, and industrial maintenance parts.
Structural Assembly
Can be reviewed for steel structures, machines, and project fastening packages according to design requirement.
How to Get a Faster Quotation
A clear inquiry helps the factory check material, tooling, heat treatment, finish, inspection, packing, and shipping details without repeated clarification. For 35CrMo alloy steel fasteners, strength class and heat treatment requirements are especially important.
- Send size list with diameter, length, thread pitch, and standard.
- Attach drawings for non-standard fasteners or special tolerances.
- Confirm material grade, equivalent material rules, and heat treatment requirement.
- State finish, quantity, packaging method, labels, and delivery schedule.
- List inspection requirements, reports, or third-party checking before quotation.
Buyer Communication Checklist
For mixed orders, separate each item by line number. For replacement parts, send photos and sample measurements if no drawing is available. If the fasteners will work with painted steel, stainless steel, aluminum, or cast parts, mention the mating material so finish and thread fit can be reviewed.
To move quickly, contact XZ Fastener with your purchase file and target delivery requirement.
FAQ
Can XZ Fastener supply 35CrMo fasteners according to DIN, ISO, or custom drawings?
Yes. Standard fasteners and drawing-based parts can be reviewed according to DIN, ISO, GB, ANSI, ASTM, or buyer drawings. For custom parts, provide dimensions, tolerance, material, finish, and inspection requirements.
What strength level can 35CrMo alloy steel fasteners reach?
35CrMo can be heat treated for higher strength applications, but the final strength depends on size, product type, heat treatment process, and the required standard. Buyers should state the target grade, hardness, or tensile requirement.
Is 35CrMo suitable for outdoor or corrosive environments?
The base material is alloy steel, so surface protection is important in corrosive environments. Zinc plating, phosphate, Geomet, Dacromet, or hot dip galvanizing can be discussed according to exposure and assembly conditions.
Can alloy steel fasteners be supplied with inspection reports?
Inspection reports for dimensions, hardness, tensile performance, coating thickness, or other agreed items can be discussed before order confirmation. Requirements should be listed clearly in the inquiry.
What information is needed for a 35CrMo fastener quotation?
Please provide product name, standard or drawing, size, thread pitch, material, heat treatment, finish, quantity, packaging, inspection requirements, and delivery destination.
Can mixed sizes be packed together for one project order?
Mixed-size project packing can be arranged according to order requirement. Buyers should provide the packing list, label format, carton weight limit, pallet requirement, and any barcode or project marking needs.
Send Your 35CrMo Alloy Steel Fastener Inquiry
For a faster quotation, send your size list, finish, quantity, packaging, and inspection requirements. Drawings, samples, or project specifications help XZ Fastener check manufacturability, heat treatment, and delivery details more accurately.
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