SS 430 Pipe
Industrial-grade ferritic stainless steel pipe for cost-effective, reliable performance
SS 430 pipe combines excellent corrosion resistance with superior cost-effectiveness, offering reliable performance in atmospheric, freshwater, and mildly corrosive industrial environments. Available in both seamless and welded configurations for maximum flexibility in industrial applications.
Quick Specifications
- UNS Designation
- S43000
- Yield Strength (Annealed)
- 240 MPa (35 ksi) minimum
- Tensile Strength (Annealed)
- 430 MPa (62 ksi) minimum
- Elongation (Annealed)
- 22% minimum
- Density
- 7.75 g/cm³
- Production Methods
- Seamless, Welded, or Custom
Standards & Certifications
Product Description
SS 430 is a ferritic austenitic chromium stainless steel grade engineered to provide an optimal balance between corrosion resistance and material cost. With 16-18% chromium content providing the base corrosion protection, the ferritic structure delivers higher strength than austenitic 304 while maintaining good formability and weldability. This combination makes 430 the preferred choice for budget-conscious industrial applications where the maximum corrosion resistance of 316 is not required.
The production of SS 430 pipe utilizes both seamless and welded manufacturing methods depending on application requirements. Seamless grades are produced through hot-rolling and drawing processes creating a uniform microstructure with superior fatigue performance. Welded variants employ inert gas welding with compatible filler materials followed by annealing to develop metallurgical stability and remove residual stresses. Both production methods result in pipes with consistent quality meeting ASTM and EN standards.
SS 430 pipe performs excellently in atmospheric exposure including industrial polluted atmospheres, rural environments, and mild coastal exposure. The material resists corrosion from dilute organic and mineral acids making it suitable for food processing, beverage production, and general industrial use. In freshwater and brackish water applications, SS 430 provides superior durability compared to carbon steel piping while offering cost advantages over premium stainless steel grades.
The versatility of SS 430 extends to thermal applications where the ferritic structure provides superior oxidation resistance at elevated temperatures up to 540°C. Thermal processing equipment, furnace components, and heat exchanger applications benefit from the combination of thermal stability and corrosion resistance. The material is readily machinable and formable, allowing for cost-effective fabrication of complex piping systems and specialized configurations.
Specifications
| UNS Designation | S43000 |
| Yield Strength (Annealed) | 240 MPa (35 ksi) minimum |
| Tensile Strength (Annealed) | 430 MPa (62 ksi) minimum |
| Elongation (Annealed) | 22% minimum |
| Density | 7.75 g/cm³ |
| Production Methods | Seamless, Welded, or Custom |
| Thermal Conductivity | 26 W/m·K at 20°C |
| Coefficient of Linear Expansion | 10.4 × 10⁻⁶ /°C (0-100°C) |
| Modulus of Elasticity | 200 GPa |
| Melting Point | 1,510°C (2,750°F) |
| Maximum Service Temperature | 540°C (1,000°F) continuous |
| Available Forms | Seamless, Welded, ERW (Electric Resistance Welded) |
Chemical Composition
| Element | Content (%) |
|---|---|
| Chromium (Cr) | 16.0-18.0 |
| Carbon (C) | 0.12 max |
| Manganese (Mn) | 1.0 max |
| Silicon (Si) | 1.0 max |
| Phosphorus (P) | 0.040 max |
| Sulfur (S) | 0.030 max |
| Nickel (Ni) | 0.50 max |
| Nitrogen (N) | 0.10 max |
| Iron (Fe) | Balance |
Mechanical Properties
| Property | Value |
|---|---|
| Hardness (Annealed) | 217 HV maximum |
| Impact Strength (Charpy V-notch) | 40-60 J at room temperature |
| Fatigue Strength | 170-200 MPa at 10⁷ cycles |
| Shear Strength | 280 MPa |
| Resilience | Good resistance to shock loads |
| Creep Strength (100,000 hours @ 450°C) | 120 MPa |
Key Features & Advantages
Applications
General Industrial Piping
Process piping, utility lines, and general industrial applications in manufacturing facilities, power stations, and chemical plants with moderate corrosion environments and budget constraints.
Architectural and Structural
Building railings, facade systems, trim, and architectural elements in urban environments requiring atmospheric corrosion resistance with aesthetic appeal and long service life.
Automotive Applications
Exhaust systems, emission control components, and automotive tubing exposed to combustion gases, thermal cycling, and road salt with requirements for cost-effective corrosion protection.
Agricultural Equipment
Farm equipment, irrigation systems, and agricultural processing equipment requiring corrosion resistance in outdoor environments with cost-effective material selection.
Thermal Processing
Furnace tubing, kiln components, and heat exchanger systems operating at elevated temperatures up to 540°C with requirements for oxidation resistance and structural reliability.
Water and Wastewater
Municipal piping systems, wastewater treatment equipment, and water distribution networks where freshwater or treated water corrosion protection is required at economical cost.
Frequently Asked Questions
What is the typical cost savings with 430 stainless versus 304?
Is SS 430 pipe available in both seamless and welded options?
Can 430 stainless be used in chemical processing applications?
What welding procedures should be used for 430 stainless pipe?
What is the expected maintenance requirement for 430 stainless pipe?
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