ASTM Q195 Q215 Q235 HSS Angle Steel with Stock Price

Material Properties: Q195, Q215, Q235 Under ASTM Standards​

All three grades fall under the mild-to-low carbon steel category, with compositions and mechanical properties calibrated to meet ASTM specifications, each offering unique advantages to match specific application needs:​

Q195 (ASTM-Compliant):​

Chemical Composition: Ultra-low carbon content (0.06%-0.12%), manganese (0.25%-0.50%), and minimal impurities (phosphorus ≤0.045%, sulfur ≤0.050%). This lean composition prioritizes formability, enabling seamless cold working, bending, and stamping without compromising structural integrity.​

Mechanical Performance: Yield strength ≥195 MPa, tensile strength 315-430 MPa, elongation ≥33%. Its exceptional ductility makes it ideal for projects requiring frequent shaping or low-to-moderate load-bearing, such as non-structural framing and lightweight fabrications.​

Q215 (ASTM-Compliant):​

Chemical Composition: Carbon content (0.09%-0.15%), manganese (0.30%-0.60%), with controlled phosphorus (≤0.045%) and sulfur (≤0.050%). The slightly higher carbon and manganese content enhances tensile strength while retaining good weldability and workability.​

Mechanical Performance: Yield strength ≥215 MPa, tensile strength 335-450 MPa, elongation ≥31%. It bridges the gap between Q195 and Q235, suitable for medium-light structural applications that need a balance of formability and load-bearing capacity, like residential roof trusses and light machinery supports.​

Q235 (ASTM-Compliant):​

Chemical Composition: Carbon content (0.12%-0.20%), manganese (0.30%-0.70%), with phosphorus (≤0.045%) and sulfur (≤0.050%) kept within strict limits. This formulation delivers optimal strength and toughness, making it the most versatile grade in the lineup.​

Mechanical Performance: Yield strength ≥235 MPa, tensile strength 370-500 MPa, elongation ≥26%. Its robust mechanical properties qualify it for medium-to-heavy structural tasks, including building columns, bridge bracing, and heavy machinery frames-living up to the HSS designation's high-strength expectations.​

Shared HSS Advantages: All three grades exhibit excellent weldability (compatible with arc welding, MIG, and TIG processes), corrosion resistance in ambient environments (aided by low impurity levels), and thermal stability-key traits for structural components exposed to varying temperatures and stress conditions.​

Structural Design & HSS-Centric Features​

As an HSS angle steel, the product's structural design is optimized to maximize strength-to-weight ratio and load distribution, critical for structural applications:​

Cross-Section Geometry: The L-shaped profile (available in equal-angle and unequal-angle configurations) features two perpendicular legs that distribute stress evenly across the structure. Equal-angle variants (e.g., 40x40mm, 50x50mm, 100x100mm) are ideal for symmetric load scenarios, while unequal-angle variants (e.g., 50x32mm, 75x50mm) excel in asymmetric structural setups, such as beam supports and frame edges.​

Thickness Optimization: Leg thicknesses range from 3mm (for 20mm-30mm legs) to 16mm (for 120mm-150mm legs), with thicknesses proportionally scaled to leg width to ensure structural balance. Thicker legs in larger sizes enhance load-bearing capacity, aligning with the HSS focus on strength.​

Dimensional Precision (ASTM Compliance): Adheres to ASTM dimensional tolerances, with angle accuracy ≤±0.5°, leg length tolerance ≤±1.2mm (for legs ≤63mm) and ≤±1.5mm (for legs >63mm), and straightness tolerance ≤3mm/m. This precision ensures seamless assembly with other ASTM-compliant structural components (e.g., beams, bolts, brackets), reducing on-site modification time.​

Standard Specifications & Customization​

Our ASTM Q195/Q215/Q235 HSS Angle Steel offers a comprehensive range of standard sizes to meet global project needs, with customization options for bulk orders:​

Standard Leg Widths: 20mm, 25mm, 30mm, 40mm, 50mm, 63mm, 70mm, 80mm, 90mm, 100mm, 120mm, 140mm (compliant with ASTM A6/A6M standards for structural steel angles).​

Standard Lengths: 6m, 9m, 12m-optimized for logistics (easy transportation via standard shipping containers) and common construction project cycles. Custom lengths (up to 18m) are available for large-scale infrastructure projects, reducing the need for on-site joining.​

Surface Treatments: To enhance durability and HSS performance, optional surface treatments include:​

Hot-Dip Galvanization: Applies a zinc coating (≥85μm thickness) for long-term corrosion resistance, ideal for outdoor structures like bridges, highway signposts, and marine-related fabrications.​

Anti-Rust Oil Coating: A cost-effective solution for indoor storage or dry-environment applications, preventing surface oxidation during transportation and inventory.​

Sandblasting: Creates a rough surface texture to improve adhesion for paint or powder coating, suitable for architectural or aesthetic-focused projects.​

Key Applications (HSS-Focused)​

Leveraging the three grades' varying strength levels and HSS attributes, the angle steel is widely used across industries:​

Construction (Residential & Commercial):​

Q195: Non-structural framing (e.g., interior wall studs, decorative railings), lightweight prefabricated sheds.​

Q215: Residential roof trusses, floor joists, balcony supports.​

Q235: Building columns, load-bearing beams, high-rise bracing, and concrete formwork-critical for withstanding heavy vertical and lateral loads.​

Infrastructure:​

Q235: Bridge bracing, highway guardrail posts, tunnel support frames, and drainage system structures-where HSS strength resists environmental stress and heavy traffic loads.​

Q215: Rural road signposts, small-scale culvert supports.​

Industrial Manufacturing:​

Q235: Heavy machinery frames (e.g., manufacturing presses, conveyor systems), industrial plant columns, and storage racking for heavy loads.​

Q215: Light-duty equipment bases, electrical enclosure frames.​

Q195: Precision fabrications (e.g., furniture brackets, small tool frames) requiring intricate shaping.​

Transportation:​

Q235: Trailer undercarriages, truck body frames, and railway track supports-handling the dynamic loads of moving vehicles.​

Q215: Bicycle racks, small utility vehicle frames.​

Quality Assurance (ASTM Compliance)​

To uphold the integrity of the HSS designation and meet ASTM standards, our angle steel undergoes rigorous quality control:​

Material Certification: Each batch is accompanied by a Certificate of Compliance (CoC) and Certificate of Quality (CoQ), verifying adherence to ASTM A6/A6M and grade-specific chemical/mechanical requirements.​

Chemical Analysis: Optical Emission Spectrometry (OES) tests confirm carbon, manganese, phosphorus, and sulfur content, ensuring alignment with Q195/Q215/Q235 specifications.​

Mechanical Testing: Tensile tests, yield strength tests, and impact tests (at -10°C for Q235) validate HSS performance, with results documented and traceable to individual batches.​

Dimensional Inspection: Precision laser scanners and digital calipers check leg width, thickness, angle accuracy, and straightness-rejecting any products outside ASTM tolerances.​

Surface Quality Audit: Visual and tactile inspections ensure no cracks, pits, scale, or unevenness on the surface, with galvanized variants undergoing additional adhesion and thickness tests (per ASTM A123).​