Furniture Stainless Steel Pipe

Shuangsen stands out as a premier global supplier and specialist manufacturer of Furniture Stainless Steel Pipe lines. Our premium equipment executes nitrogen-protected welding paired with pure hydrogen annealing to achieve a high stretching limit above 690 Mpa and zero rust formation across 1000 hours of standard salt spray testing.

Metallurgical Composition and Structural Parameters

Chemical Element Thresholds

Precision manufacturing demands rigid monitoring of raw elemental composition. The following dataset details the precise maximum and minimum chemical percentage distributions managed across our production lines:

Material Designation	C (%)	Si (%)	Mn (%)	P (%)	S (%)	Cr (%)	Ni (%)	Ti (%)
Type 409	≤ 0.08	≤ 1	≤ 1	≤ 0.045	≤ 0.045	10.5 ~ 11.75	≤ 0.5	6 × C ~ 0.70
Type 409L	≤ 0.06	≤ 1	≤ 1	≤ 0.015	≤ 0.015	10.5 ~ 11.75	≤ 0.5	10 × C ~ 0.75
Type 410	≤ 0.04	≤ 1	≤ 1	≤ 0.045	≤ 0.045	10.3 ~ 12.5	≤ 0.5	—

Mechanical Capability and Yield Performance

To support advanced physical manipulation without failure, raw tubes are optimized for structural resilience. The verified laboratory yield metrics and hardness tolerances are specified below:

Material Designation	Tensile Strength (MPa)	Yield Strength (MPa)	Elongation (%)	Hardness (HB)
Type 409	460	265	32	140
Type 409L	410	235	37	123
Type 410	365	195	22	200

Dimensional Matrix and Engineering Tolerances

To fit modern structural framing layouts perfectly, each Furniture Stainless Steel Pipe is manufactured to tight spatial standards. The geometric distribution profile details all standardized thickness and outer diameter combinations.

Standard Dimension Sizing Guide

Outer Diameter D (mm)	Available Wall Thickness T (mm)
Φ 25 Under	0.5 / 0.6 / 0.7 / 0.8 / 0.9 / 1.0 / 1.2 / 1.5 / 2.0 / 2.5 / 3.0 / 4.0
Φ 25 ~ Φ 44.5	0.5 / 0.6 / 0.7 / 0.8 / 0.9 / 1.0 / 1.2 / 1.5 / 2.0 / 2.5 / 3.0 / 4.0
Φ 44.6 ~ Φ 63.5	0.5 / 0.6 / 0.7 / 0.8 / 0.9 / 1.0 / 1.2 / 1.5 / 2.0 / 2.5 / 3.0 / 4.0
Φ 76.2 - Φ 101.6	0.5 / 0.6 / 0.7 / 0.8 / 0.9 / 1.0 / 1.2 / 1.5 / 2.0 / 2.5 / 3.0 / 4.0
Φ 101.6 Upwards	0.5 / 0.6 / 0.7 / 0.8 / 0.9 / 1.0 / 1.2 / 1.5 / 2.0 / 2.5 / 3.0 / 4.0

Technical Procurement Specifications

When requesting batch production, specifications must include the following parameters to ensure complete component accuracy:

• Name of product: Explicit designation of the required geometry.
• Mark of stainless steel: Material classification (e.g., 201, 304, 316L, 409).
• Dimensions & Tolerances: Explicit outside diameter tolerance parameters and actual thickness values.
• Quantity & Packaging: Exact total run requirements paired with the designated packing way.
• Surface Finishing: Specification of mechanical sanding parameters (180#-400#) or high-gloss configurations.
• Special Criteria: Any other unique mechanical adjustments requested for the forming lines.

Process Engineering and Heat Treatment Parameters

Welding Alignment and Gas Shielding

The forming pipeline applies all-nitrogen protection welding to ensure the resulting weld path remains completely straight and free from shadows. This is matched with an advanced pure hydrogen annealing protection system. The resulting matrix delivers a stretching capacity exceeding 690 Mpa and an expansion capability higher than 30%, which allows the tube to undergo complex mechanical transformations without bursting.

Surface Polishing Classifications

Exterior layers undergo rigorous mechanical polishing to ensure flawless presentation across design layouts. Surfaces are processed into two primary categories:

• Bright Surface Finish: Achieved through continuous mechanical tracking from 180# to 400#.
• Mirror Surface Finish: High-end specular calibration ranging from 400# to 800# for maximum reflectivity.

Thermal Stability Boundaries

The structural alloy maintains physical properties across wide thermal variations. The intermittent high service temperature limit reaches 815°C, while continuous service is maintained up to 675°C. Internal structural stresses are completely relieved via a specialized bell furnace annealing treatment held steadily at 860°C ± 10°C.

Industrial Deployments

Due to superior cold-forming capabilities, this industrial Furniture Stainless Steel Pipe adapts well to aggressive bending and shaping. Common application environments include:

• High-end personal furniture frame assemblies and luxury residential metal installations.
• Commercial office furniture structures requiring excellent load bearing and straightness.
• Detailed art statues and modern architectural design features requiring deep mirror-finish aesthetics.
• Hardware components and high-use equipment frames that demand long-term wear resistance.

Quality Verification and Diagnostic Methods

To secure absolute structural field reliability, each production lot undergoes non-destructive and destructive mechanical testing managed by technical experts:

• Flattening Test: Compresses the tube wall to ensure the weld zone handles structural compression without splitting.
• Bending Test: Evaluates structural ductility and wall integrity along tight bending radii.
• Expanding Test: Includes specialized mouth expansion and contraction tests to confirm the material expands beyond 30% without fracturing.
• Mechanical Property Test: Measures exact tensile limits above 690 Mpa, yield thresholds, and hardness values against international standards.

Why Choose Us

• 1000-Hour Corrosion Immunity: The outer metal matrix handles a continuous 1000-hour salt spray exposure test with zero surface corrosion.
• Advanced Post-Forming Performance: Specialized all-nitrogen shielding ensures the product handles pipe expansion, pipe shrinking, complex piping maneuvers, and flattening sequences without bursting.
• Substantial Production Infrastructure: Operating from a 20,000-square-meter facility launched in 1999, housing 133 complete industrial welded assembly lines backed by 25+ years of specialized engineering experience.
• Global Certifications: Production matches strict regulatory standards, including ISO9001 Quality Management, ISO14001 Environmental, ISO45001 Occupational Health, and ISO13485 Medical Device Quality Management certifications.

Frequently Asked Questions

What prevents the material from splitting when bent into complex furniture frames?

The high processing durability is achieved by combining all-nitrogen protection welding with pure hydrogen annealing. This matching process removes internal crystal stresses, resulting in a strong weld path with an elongation capacity over 30% and a tensile limits profile over 690 Mpa.

Why is bell furnace annealing critical for this product?

Processing the alloy through bell furnace annealing at exactly 860°C ± 10°C stabilizes the microstructure. This allows components to maintain high structural integrity during continuous exposure up to 675°C and intermittent thermal loads up to 815°C.

How is the reflective finish verified before shipment?

Surface reflectivity is checked against standard mechanical polishing guides. This ensures that whether a specification requires a 180#-400# bright texture or a 400#-800# mirror finish, the exterior is completely smooth and shadow-free.

Strategic Integration and Brand Standards

Deploying a robust Furniture Stainless Steel Pipe across high-end commercial frameworks requires absolute dimensional and structural accuracy. From the selection of premium raw steel batches to the precise tracking of outer diameter parameters from Φ 25 under up to Φ 101.6 upwards, our manufacturing processes are optimized to eliminate component failure. By investing continuously in advanced research and upgrading our automated assembly equipment, our factory delivers reliable structural components to global industrial markets, maintaining the independent reputation and high excellence standards of the global Shuangsen brand.