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Our High-Strength Alloy Structural Steel Round Bar is engineered for demanding industrial applications that require exceptional mechanical properties, dimensional accuracy, and long-term reliability. Manufactured from premium-grade alloy structural steel (conforming to standards such as GB/T 3077, ISO 683-1, and ASTM A322/A434), each bar undergoes precision grinding and controlled heat treatment (typically quenching and tempering) to achieve optimal strength, toughness, and surface finish.
Ideal for use in aerospace components, heavy machinery shafts, hydraulic rods, high-performance automotive parts, oil & gas drilling equipment, and precision tooling, this product delivers consistent performance under extreme stress, fatigue, and wear conditions.
Key Features & Benefits
✅ High Yield & Tensile Strength: Achieves yield strengths up to 900–1200 MPa (depending on grade and heat treatment).
✅ Precision Ground Surface: Surface roughness as low as Ra 0.4–0.8 µm, ensuring excellent fit and reduced friction in dynamic assemblies.
✅ Uniform Hardness & Microstructure: Full through-hardening with minimal distortion due to controlled quenching and tempering cycles.
✅ Tight Dimensional Tolerances: Diameter tolerance up to h6/h7 per ISO 286, suitable for direct machining or press-fit applications.
Chemical Analysis: Spectrometry (OES) for precise elemental control
Tensile Testing: Per GB/T 228.1 or ASTM E8
Charpy Impact Test: At room and sub-zero temperatures
Hardness Mapping: Cross-section verification
Non-Destructive Testing (NDT): Optional ultrasonic (UT) or magnetic particle inspection (MPI) for critical applications
Ordering Information
When placing an order, please specify:
Steel grade (e.g., 42CrMo4 / AISI 4140)
Diameter and length
Required tolerance class (h6, h7, etc.)
Heat treatment condition (Q+T, normalized, etc.)
Surface finish requirement
Quantity and delivery terms (FOB, CIF, etc.)
Sample pieces available upon request for prototyping and validation.
Sustainability & Compliance
Our production adheres to environmental regulations (ISO 14001) and uses recycled scrap as primary raw material. All products are RoHS and REACH compliant, with full documentation available.
Conclusion
The High-Strength Alloy Structural Steel Round Bar – Precision Ground & Heat Treated represents the pinnacle of engineered bar stock for high-performance engineering. By combining advanced metallurgy, precision finishing, and stringent quality control, we deliver a product that reduces machining time, enhances component life, and ensures reliability in the most challenging environments.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Distributor/Wholesaler,Exporter
Total Annual:
>1000000
Employee Number:
>100
Ecer Certification：
Verified Supplier
Our company is located in Wuxi City, China, we are a stainless steel plate, seamless steel pipe, round steel, steel belt, decorative pipe and other products distribution wholesale private enterprise. Our company operates stainless steel plate, seamless steel pipe, round steel, steel belt, decorative... Our company is located in Wuxi City, China, we are a stainless steel plate, seamless steel pipe, round steel, steel belt, decorative pipe and other products distribution wholesale private enterprise. Our company operates stainless steel plate, seamless steel pipe, round steel, steel belt, decorative...
