ASTM A815 CR430
ASTM A815 CR430 Stainless Steel Pipe Fittings
ASTM A815 CR430 pipe fittings are manufactured from ferritic stainless steel Grade 430 (UNS S43000) and are designed to deliver dependable performance in moderately corrosive industrial environments. As part of the CR class under ASTM A815/A815M, these fittings are produced in accordance with MSS SP-43 standards, ensuring high-quality construction suitable for lower-pressure and light-duty applications. Known for their excellent resistance to stress corrosion cracking, good formability, and impressive durability at elevated temperatures,
ASTM A815 CR430 fittings are widely used in industries such as chemical processing, food and beverage, heat exchangers, and architectural piping systems. With superior performance in oxidizing conditions and cost-effective production, CR430 stainless steel fittings serve as a reliable and economical solution for process piping systems.
Key Features
Produced using ferritic stainless steel Grade 430 (UNS S43000)
Conforms to ASTM A815 / MSS SP-43 standards
Excellent resistance to mild corrosion and industrial atmospheres
Good oxidation and scaling resistance up to elevated temperatures
Superior resistance to stress-corrosion cracking vs austenitic steels
Good formability, weldability, and dimensional stability
Magnetic stainless steel with low thermal expansion
Specification
| Property | Details |
|---|---|
| Standard | ASTM A815 / A815M |
| Class | CR (MSS SP-43) |
| Grade | CR430 |
| Material Type | Ferritic Stainless Steel |
| UNS Designation | S43000 |
| AISI Equivalent | 430 |
| Manufacturing | Welded / Seamless |
| Sizes | ½” – 48” (DN15–DN1200) |
| Thickness | SCH 10 – SCH XXS |
| End Form | Bevelled Ends (BW) |
| Surface Finish | Mill Finish / Pickled & Passivated |
Equivalent Grades
| Standard | Grade |
|---|---|
| ASTM | A815 CR430 |
| UNS | S43000 |
| AISI | 430 |
| EN | 1.4016 |
| JIS | SUS 430 |
Available Sizes
Pipe Size: ½” to 48”
Wall Thickness: SCH 10 – XXS
Available Dimensions: ANSI/ASME B16.9 & B16.28
Chemical Composition
| Element | Percentage (%) |
|---|---|
| Chromium (Cr) | 16.0 – 18.0 |
| Carbon (C) | ≤ 0.12 |
| Manganese (Mn) | ≤ 1.00 |
| Silicon (Si) | ≤ 1.00 |
| Nickel (Ni) | ≤ 0.50 |
| Phosphorus (P) | ≤ 0.040 |
| Sulfur (S) | ≤ 0.030 |
| Iron (Fe) | Balance |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | ≥ 450 MPa |
| Yield Strength | ≥ 280 MPa |
| Elongation | ≥ 20% |
| Hardness | ≤ 202 HBW |
Physical Properties
| Property | Value |
|---|---|
| Density | ~7.7 g/cm³ |
| Melting Range | 1500–1510°C |
| Modulus of Elasticity | ~200 GPa |
| Thermal Conductivity | Higher vs austenitic stainless |
| Thermal Expansion | Lower vs 304/316 stainless |
Types of ASTM A815 CR430 Fittings
ASTM A815 CR430 Elbow
ASTM A815 CR430 Tee
ASTM A815 CR430 Reducers
ASTM A815 CR430 Caps
ASTM A815 CR430 Cross Fittings
ASTM A815 CR430 Nipples
ASTM A815 CR430 Couplings
ASTM A815 CR430 Stub Ends
Corrosion Resistance
Suitable for mild chemical, alkaline & atmospheric environments
Good resistance to water, organic acids & food-processing media
Strong resistance to stress corrosion cracking
Not recommended for high chloride or acidic service
Heat Resistance
Good oxidation resistance up to ~815°C
Resists thermal scaling at high temperature
Ideal for exhaust systems, furnaces & heat exchangers
Heat Treatment
Annealing: 760°C – 815°C, air cool
Stress relief advisable after severe forming
Avoid rapid water quenching — may cause brittleness
Welding
Weldable using standard stainless welding methods
Recommended filler metals: ferritic or matching 430 grade
Post-weld annealing recommended in demanding applications
Pre-heat typically not required
Fabrication
Good machinability & press-forming ability
Can be roll-formed and bent
Magnetic and easy to process in fabrication lines
Avoid excessive cold work without annealing
Applications
Chemical processing systems
Food processing & dairy equipment
Architectural & interior piping systems
Exhaust & flue gas systems
Heat exchangers & industrial furnaces
Decorative stainless installations
Water treatment piping
Automotive exhaust components