Product Name
Agricultural Machinery Accessories - Square Steel (Square Bar for Ag-Equipment Parts)
Introduction
Square Steel for agricultural machinery accessories are solid square-section bars supplied as raw or semi-finished stock for making pins, couplings, bearing blocks, clevises, hub blanks, coupling flats, linkage blocks, mounting plates and other farm-equipment components. They combine simple geometry for easy clamping and indexing, predictable machining allowances, and material/heat-treat options to endure impact, abrasion and corrosive field conditions.
Typical Materials & Grades
Carbon / mild steels: C15, C22, C45 (common for pins, brackets and general parts).
Medium-alloy / heat-treatable: 1045, 4140 / 42CrMo for higher strength/toughness where quench & temper is required.
HSLA / structural: S355 / Q345 for larger structural square stock.
Stainless: 304 / 316 for corrosion-prone applications (irrigation, coastal).
Free-machining variants and custom chemistries available on request.
Supply Conditions & Surface Finishes
Hot-rolled - economical for larger sizes and non-critical finishes.
Cold-drawn / bright - tighter across-flats tolerances, improved straightness and better surface finish for precision parts.
Precision ground - for bearing seats, tight-fit assemblies and minimal machining allowance.
Heat-treatment options: annealed (for machining), normalized, quenched & tempered, case-carburized or induction-hardened.
Surface protection: oiled/VCI wrap, phosphate, black oxide, zinc plating or hot-dip galvanize for corrosion resistance.
Typical Sizes & Tolerances
Across-flats (side): commonly 6 mm – 300 mm (typical accessory sizes 10–120 mm).
Lengths: standard 1–6 m; cut-to-length, custom short blanks or long bars per order.
Typical tolerances:
Hot-rolled: ±0.2 – ±2.0 mm (size dependent)
Cold-drawn: ±0.02 – ±0.3 mm
Ground: ±0.005 – ±0.05 mm possible for tight fits
Straightness: typically ≤ 0.2 – 1.5 mm/m, tighter control available.
Weight Calculation (quick)
Mass per metre (kg/m) ≈ (side in mm)² × 0.00785
Examples:
20 × 20 mm → 3.14 kg/m
40 × 40 mm → 12.56 kg/m
80 × 80 mm → 50.24 kg/m
Mechanical Properties (guidance)
Properties depend on grade and heat treatment. Typical ranges:
Mild steel (C15/C22): moderate tensile & elongation; easy to machine/weld.
C45 / 1045 (normalized): higher tensile/yield for load-bearing pins and shafts.
4140 (Q&T): high strength and toughness for critical, impact-loaded parts.
Specify grade and desired hardness or tensile targets for precise data.
Key Features & Advantages
Easy fixturing & machining: four flats simplify clamping, indexing and multi-face machining.
Reduced machining allowance: cold-drawn/ground squares require less stock removal than billets.
Heat-treat flexibility: supply soft for machining or hardened for wear/impact points.
Good replacement friendliness: common sizes simplify repair/field replacement of farm parts.
Corrosion protection options: long-life finishes for wet/aggressive farm environments.
Typical Applications
Hitch and clevis blocks, coupling hubs and square pins.
Gearbox/motor hubs, bracket blocks and fixture bases.
Bearing housing blanks (pre-machined), shear pin blanks and locking keys.
Quick-attach mount templates, PTO adaptor blanks and small forging feedstock.
Repair stock for worn structural or mechanical components in the field.
Value-Added Services
Cut-to-length, chamfering & facing of ends.
CNC turning, milling, drilling (holes, tapped holes, pockets) prior to delivery.
Precision grinding / planing for tight-fit surfaces.
Keyways, slots, threads and cross-drilling as per print.
Heat treatment & hardness certification (quenched & tempered, case-carburized, nitrided).
Surface treatments: galvanize, plating, phosphate or painting; VCI/oil for shipment.
Kitting: supply with matching bushings, circlips, washers and packaging by part number.
Quality Assurance & Testing
Material certification (MTC) with chemical & mechanical data available.
Dimensional inspection: across-flats, straightness and length reports.
Mechanical testing: tensile, hardness and Charpy impact on request.
NDT: MT/PT/UT available for critical safety parts.
Batch marking & traceability for warranty/recall control.
Packaging & Delivery
Bundled on timber skids with polymer spacers; precision pieces individually wrapped and end-capped.
Protection: oil/VCI for export and long storage.
Labeling: size, grade, heat no., PO/part no. for easy picking on assembly lines.
Lead times: stock sizes short (days → 2 weeks); custom grades, machining or heat treatment typically 2–8 weeks depending on volume.
Ordering Information - What We Need
Please supply:
Across-flats × length × quantity for each size.
Material grade and required supply condition (hot-rolled / cold-drawn / ground / heat-treated).
Tolerance class and straightness requirement.
Required machining/features (holes, keyways, threads, slots).
Surface finish / corrosion protection and any certification/NDT needs.
Delivery constraints (single-piece transport limits) and desired lead time.
If you like, send a short parts list (sizes, quantities and intended function) and I'll return a size-to-weight table, recommend grades and supply conditions for each part, plus machining and heat-treatment suggestions suitable for agricultural use.
Hot Tags: agricultural machinery accessories square steel, China agricultural machinery accessories square steel manufacturers, suppliers, factory
