Flat steel can be used to form various stress components according to the different needs of the structure, and it can also be used as a connection between components. Widely used in various building structures and engineering structures, such as beams, bridges, transmission towers
I. Excellent Corrosion Resistance (Core Material Advantage)
The primary strength of stainless steel flat bar stems from its chromium (Cr) content (typically ≥10.5%). Chromium reacts with oxygen to form a dense, stable chromium oxide (Cr₂O₃) passive film on the surface, which effectively blocks corrosive media (air, water, acids, alkalis) from attacking the underlying steel. Specific performance includes:
Resistance to general environmental corrosion: Maintains rust-free performance in atmospheric, freshwater (tap water, rainwater) environments for long periods. Ideal for outdoor construction components (e.g., guardrails, brackets) and indoor decorative parts.
Enhanced resistance to specific media (grade-dependent):
304 stainless steel flat bar: Contains 18% Cr and 8% Ni, resisting mild acids (vinegar, fruit juices), household detergents, and humid conditions. Suitable for kitchen hardware (e.g., countertop supports) and food processing equipment parts.
316 stainless steel flat bar: Adds molybdenum (Mo, ~2-3%), significantly improving resistance to strong acids (sulfuric acid, seawater, and industrial chemicals). Perfect for marine applications (ship deck brackets), coastal infrastructure, and chemical plant pipelines.
430 stainless steel flat bar: A cost-effective ferritic grade (16-18% Cr, no Ni), offering basic rust resistance for dry indoor scenarios (e.g., furniture trim, decorative strips).
II. High Mechanical Strength & Durability
Stainless steel flat bar balances strength, toughness, and structural stability, meeting the demands of both load-bearing and wear-resistant applications:
Superior tensile & yield strength: For common grades, 304 flat bar has a tensile strength of 515-795 MPa and yield strength ≥205 MPa; 316 flat bar reaches 515-827 MPa tensile strength. This enables it to bear static/dynamic loads, such as supporting mechanical components (e.g., machine bases) or structural frames.
Good toughness & impact resistance: Unlike brittle high-carbon steels, stainless steel (especially austenitic grades like 304/316) retains high ductility (elongation ≥40% for 304) even at low temperatures (-196°C for 304). It withstands minor impacts (e.g., accidental collisions with equipment) without cracking.
Long service life: Resists wear, oxidation, and environmental aging. In typical indoor environments, 304 flat bar has a service life of 20-30 years; 316 flat bar can last 30-50 years in coastal or industrial settings—far longer than carbon steel flat bars (prone to rust).
