Product Overview
Our ASTM A182 F347 flanges are forged from genuine 347 alloy and fully comply with all ASTM A182 criteria, locking the weld and preventing cracking. Furnace testing at 650°C (according to ASTM E21) revealed 85% retention of room-temperature tensile strength (550-700 MPa), making them ideal for high-temperature systems such as boiler piping.
Key Details
In corrosion testing (ASTM B117 salt spray testing), they outperform many other stainless steel grades.
We offer two surface finishes: pickled (per ASTM A380) to remove forge scale and improve weldability, and a 2B rolled finish.
Our machining process is precise: bolt holes are CNC-drilled. Each flange undergoes ultrasonic testing (per ASTM E213) to check for internal defects. We also install plastic caps to protect the sealing surfaces during shipping.
We source raw materials exclusively from certified steel mills. Every incoming billet is inspected using our direct-reading spark tester (OES).
Our warehouse holds 300-500 tons of ASTM A182 F347 flanges ready for coiling. Sizes range from 1-inch beer line to 36-inch jumbo flanges used in refineries. Flanges can be boxed within 5 days, eliminating the need for rushed processing during critical customer downtime.
Orders over 40 tons receive a 6% discount, free pickling, and 24% ocean freight coverage (shipping to Rotterdam or Houston).
We guarantee: If any ASTM A182 F347 flange fails to meet ASTM A182 mechanical standards, we will replace it within 7 days and refund all shipping costs. We also lock in pricing for 45 days after your order is confirmed, ensuring you're not caught off guard by market fluctuations.
Manganese (Mn)
Phosphorus (P)
Silicon (Si)
Chromium (Cr)
18.00–20.00
Nickel (Ni)
Niobium + Tantalum (Nb+Ta)
≥10×C, ≤1.00
Minimum Requirement
Tensile Strength
550-700 MPa (75,000 psi)
Yield Strength
205 MPa (30,000 psi)
Elongation (in 50mm)
Hardness (Max)
Frequently Asked Questions
Q: What is your policy for product returns or replacements?
If products have quality issues caused by us, we'll arrange replacements or refunds within 30 days of receipt.
Q: Is there a warranty period for your products? How long is it?
Yes, all products have a 12-month warranty. During this period, we'll handle any quality-related issues free of charge.
Q: Can you arrange door-to-door delivery service?
Yes, we can arrange door-to-door delivery through our freight forwarders, covering customs clearance and final transportation to your address.
Q: What testing reports can you provide for the products?
We can provide reports such as pressure test, chemical composition analysis, and mechanical property test, as per your request.
