Set 1
Q: What's the difference between S355j2, S355j0 and S355jr?
A: The key difference lies in their impact toughness requirements at different temperatures. S355jr requires minimum 27 J impact energy at +20°C, S355j0 at 0°C, and S355j2 at -20°C. This makes S355j2 suitable for low-temperature environments like cold regions, while S355jr works for general ambient conditions. All meet EN 10025 standards and have same tensile strength (470-630 MPa) and yield strength (≥355 MPa). Choosing the right grade depends on your project's temperature working conditions. We can help recommend the most suitable one based on your usage scenario.
Q: What common sizes do these S355 angle bars come in?
A: Standard sizes for S355 series angle bars range from 20x20mm to 200x200mm, with thicknesses from 3mm to 25mm. Popular options like 40x40x5mm, 50x50x6mm are always in stock for quick delivery. We also offer customized sizes if your project needs non-standard dimensions. Each size is produced with precise dimensional tolerance (±0.5mm for legs) to ensure assembly fit. You can check our stock list for immediate availability or discuss custom specs with us.
Q: Are these angle bars suitable for heavy structural use?
A: Yes, S355 series angle bars are ideal for heavy structural applications. With yield strength ≥355 MPa and high tensile strength, they're widely used in building frames, bridge supports, and industrial machinery bases. Their good ductility prevents brittle failure under heavy loads. Many construction and engineering firms rely on them for load-bearing structures. We've supplied them to numerous large-scale infrastructure projects with positive feedback. Just confirm your load requirements, and we can verify suitability.
Q: What's the MOQ for S355 angle bars?
A: Our standard MOQ is 1 ton for common sizes and grades like S355jr. For less popular grades (S355j2/S355j0) or custom sizes, MOQ may be 2-3 tons. However, we're flexible for trial orders-smaller quantities can be negotiated if you're testing the material. Bulk orders (over 10 tons) enjoy lower unit prices and priority production. We'll clearly communicate MOQ and pricing based on your specific needs.
Q: How long does delivery take for S355 angle bars?
A: In-stock S355jr angle bars (common sizes) ship within 3-5 working days. For S355j0/S355j2 or custom sizes, production takes 7-12 working days plus shipping time. Delivery duration also depends on your location: nearby regions take 2-3 days, while international shipping (by sea) may take 2-4 weeks. We provide tracking numbers once shipped and update you on production progress if it's a custom order. Rush delivery options are available for urgent needs at a small extra cost.
Set 2
Q: What surface treatments are offered for S355 angle bars?
A: Common surface treatments include mill finish (black oxide), hot-dip galvanizing, and epoxy coating. Mill finish is cost-effective for indoor use or temporary structures. Hot-dip galvanizing adds a zinc layer, providing excellent corrosion resistance for outdoor/ humid environments (service life up to 20 years). Epoxy coating offers color customization and chemical resistance, ideal for industrial settings. We can also do phosphate treatment for better paint adhesion. Choose based on your project's corrosion protection needs and budget.
Q: Can you cut S355 angle bars to my required length?
A: Yes, we provide precision cutting services for all S355 grades. You can specify any length from 1m to 12m-common custom lengths are 3m, 6m, and 9m. We use CNC cutting machines to ensure smooth edges and accurate length tolerance (±1mm). A small additional fee applies for custom cutting, which varies by quantity and length complexity. For large orders, we can even pre-cut holes if you provide a drilling layout. The cut bars are ready for immediate installation upon delivery.
Q: Do you provide quality certificates for S355 angle bars?
A: Absolutely-every batch of S355 angle bars comes with a complete quality certificate (EN 10204 3.1). The certificate includes material composition (e.g., C ≤0.22%, Mn ≤1.60%), mechanical properties (yield/tensile strength, impact test results), dimensional inspection, and heat treatment records. For S355j2/S355j0, it specifically notes impact test data at -20°C/0°C. We send electronic certificates via email after shipment, and paper copies can be included with the goods upon request. These certificates are recognized for project acceptance globally.
Q: How much does 1m of S355 angle bar weigh?
A: Weight per meter depends on leg size and thickness. For example, 50x50x5mm S355 angle bar weighs ~3.77 kg/m, 63x63x8mm weighs ~7.55 kg/m, and 80x80x6mm weighs ~7.37 kg/m. The weight follows the standard steel angle formula: (leg1 + leg2 - thickness) × thickness × 0.00785. We provide a detailed weight chart for all sizes to help you calculate total order weight and shipping costs. Just tell us the size and quantity, and we'll give you the exact total weight quickly.
Q: Are S355 angle bars weldable?
A: Yes, S355 series angle bars have excellent weldability. They work with common welding methods: arc welding, MIG welding, TIG welding, and submerged arc welding. For thicknesses ≤16mm, no pre-heating is needed; thicker sections (＞25mm) may require pre-heating to 100-150°C to avoid cold cracks. Welded joints maintain high strength-typically 80-90% of the base material's tensile strength. Many fabricators prefer S355 for its consistent weld quality. We can provide welding procedure guidelines if you need technical support.
Set 3
Q: What industries use S355j2/S355j0/S355jr angle bars most?
A: These angle bars are widely used across industries. Construction relies on them for high-rise building frames, roof trusses, and foundation supports. The automotive industry uses them for truck chassis and trailer frames. In energy, they're used for wind turbine towers and solar panel brackets. Heavy machinery manufacturers use them for equipment frames and load-bearing parts. Marine industry uses galvanized S355j2 for ship hull components (due to low-temperature resistance). Their versatility makes them a top choice for structural steel needs.
Q: Can I get samples before placing a bulk order?
A: Yes, we offer free samples (up to 2 pieces) for standard sizes/grades-you only pay shipping. Samples are shipped within 2-3 working days and match bulk product quality. For custom samples (specific size/ treatment), a small sample fee applies, which is refundable upon bulk order. Samples include a mini quality certificate for your testing (e.g., hardness, weldability). Many customers test samples for project compliance before ordering. Just let us know the grade, size, and quantity of samples you need.
Q: What's the chemical composition of S355 angle bars?
A: Key chemical components (max limits) for S355 series: carbon ≤0.22%, manganese ≤1.60%, silicon ≤0.55%, phosphorus ≤0.035%, sulfur ≤0.035%. For S355j2, additional niobium (≤0.05%), vanadium (≤0.12%), and titanium (≤0.20%) may be added to enhance toughness. These elements are strictly controlled during production to ensure mechanical properties. Low P/S content reduces brittleness, while Mn improves strength. We provide detailed composition reports in the quality certificate-just ask if you need specific element data for your project.
Q: How are S355 angle bars packaged for shipping?
A: Standard packaging: angle bars are bundled with 2-3 steel straps (every 1-1.5m) to prevent shifting. Each bundle is wrapped in waterproof PE film to protect from moisture/dust. For sea shipping or long-distance transport, we add wooden pallets (40x40cm) to avoid ground contact and damage. Custom packaging (e.g., moisture-proof paper, anti-rust oil) is available for special needs. Bundle weight is usually 500-1000kg for easy handling. We mark each bundle with grade, size, length, and batch number for easy identification.
Q: Do you offer discounts for large orders?
A: Yes, quantity discounts apply to S355 angle bar orders. Orders 5-10 tons get 3% off, 10-20 tons get 5% off, and over 20 tons get 8-10% off. Discounts are higher for in-stock grades (S355jr) than custom ones. For repeat customers, we offer additional 2% loyalty discount. Combining multiple sizes/grades in one order also qualifies for better pricing. We provide a detailed quotation with discounts clearly listed-just share your order quantity and specs, and we'll give you the best price.
Set 4
Q: What's the maximum length available for S355 angle bars?
A: Standard maximum length is 12 meters for most sizes (up to 100x100mm). For larger sizes (125x125mm and above), maximum length is 10 meters due to production and transport limitations. Longer lengths (up to 15 meters) can be custom-produced for specific projects, but require special shipping (e.g., flatbed trucks) to avoid bending. We assess transport feasibility before confirming long-length orders-factors like road restrictions and loading capacity matter. Shorter lengths (1-6m) are easier to handle and ship, so many customers opt for these for convenience.
Q: Can S355 angle bars be used in cold environments?
A: It depends on the grade: S355j2 is specifically designed for cold environments (down to -20°C) with its -20°C impact test requirement. S355j0 works for slightly cold conditions (0°C), while S355jr is only for ambient temperatures (+20°C). Using S355jr in cold environments risks brittle fracture. We've supplied S355j2 to construction projects in northern Europe and Canada with excellent performance. If your project is in a cold region, we strongly recommend S355j2. We can also provide low-temperature impact test reports for verification.
Q: How do you ensure quality of S355 angle bars?
A: We have a strict 5-step quality control process. First, raw material inspection (certificate verification and composition testing). Second, in-process checks: monitoring rolling temperature and dimensional accuracy during production. Third, mechanical testing: tensile, yield, and impact tests for each batch. Fourth, surface inspection: checking for cracks, scratches, or rust (rejecting defective pieces). Fifth, final inspection: verifying length, thickness, and packaging before shipment. We also conduct random sampling for third-party testing if required. This ensures 99.9% product qualification rate.
Q: What payment terms do you accept?
A: We offer flexible payment terms. For standard orders: 30% advance payment via T/T, 70% balance before shipment. For large orders (over 20 tons): 20% advance, 70% before shipment, 10% after receipt (with 30-day credit). L/C at sight is accepted for international orders. Small sample orders can use PayPal or Western Union. We also accept Alibaba Trade Assurance for your payment security. Currency is usually USD, but EUR, GBP, or RMB can be arranged. Payment terms can be negotiated for long-term 合作.
Q: Is there a warranty for S355 angle bars?
A: We provide a 12-month warranty from delivery. The warranty covers manufacturing defects: dimensional deviations beyond EN standards, unqualified mechanical properties, or surface rust caused by poor packaging. It does not cover damage from improper use (e.g., overloading, wrong welding) or transportation. If defects occur, send photos and the quality certificate-we'll arrange replacement or refund within 7 working days. For large projects, we can send technicians for on-site inspection if needed. Our goal is to ensure your satisfaction with the product quality.
Set 5
Q: Can S355 angle bars be drilled or punched?
A: Yes, S355 series angle bars are easy to drill and punch. Their moderate hardness (Brinell hardness ~160-180 HB) allows for smooth machining with standard tools. We offer pre-drilling/punching services: hole diameters from 4mm to 30mm, spacing as per your design. CNC punching machines ensure hole position accuracy (±0.3mm) and clean edges. Pre-machined angle bars save you on-site processing time and labor costs. For thick angle bars (＞15mm), we use high-speed drills to avoid burrs. Just provide your drilling layout, and we'll handle the rest.
Q: What's the difference between S355 and S275 angle bars?
A: The main difference is strength: S355 has yield strength ≥355 MPa, while S275 is ≥275 MPa. S355 also has higher tensile strength (470-630 MPa vs. 370-530 MPa for S275). This makes S355 suitable for heavier loads and larger structures. S355's impact toughness options (j2/j0/jr) are more versatile for different temperatures. However, S355 is slightly more expensive than S275. Choose S355 if your project requires higher strength; S275 works for lighter structural needs. We can help compare both based on your load calculations.
Q: Are S355 angle bars recyclable?
A: Yes, S355 angle bars are 100% recyclable-they're made of carbon steel, which is one of the most recycled materials globally. Recycled S355 retains its mechanical properties, so it's widely reused in steel production. This makes S355 an eco-friendly choice for sustainable projects. Many of our customers appreciate its recyclability for green building certifications (e.g., LEED). We also source raw materials from recycled steel suppliers where possible. Using recyclable steel helps reduce carbon footprint and waste.
Q: How do I calculate the required quantity for my project?
A: First, determine the length of angle bar needed per component (e.g., 3m per support bracket). Multiply by the number of components to get total length. Then, use the weight per meter (from our chart) to calculate total weight. Add 5-10% extra for cutting waste or unexpected needs. For example, 100 brackets × 3m = 300m; 300m × 3.77 kg/m = 1131kg; add 10% → 1244kg (order ~1.3 tons). We can also help calculate quantity if you share your project drawings or bill of materials. Our sales team has engineering experience to assist with accurate estimates.
Q: Can you ship S355 angle bars internationally?
A: Yes, we ship to over 50 countries globally. We work with reliable freight forwarders for sea (FCL/LCL), air, and land transport. For sea shipping, port-to-port delivery takes 2-6 weeks (e.g., China to Europe: 4 weeks, China to USA: 3 weeks). We handle all export documentation: commercial invoice, packing list, bill of lading, and quality certificate. We can also arrange door-to-door delivery for convenience. Import duties and taxes are the buyer's responsibility, but we provide a commercial invoice with accurate value for customs clearance. We've shipped large orders to Australia, Germany, and Brazil with smooth delivery records.
