ASTM A403 WP304 Stainless Steel Fittings
At Amardeep Steel Centre LLP, we are committed to delivering the highest quality products to meet your industrial needs. Among our most sought-after offerings are the ASTM A403 WP316 Stainless Steel Fittings. Known for their durability, strength, and resistance to corrosion, these fittings are integral to many industrial applications. This page provides a comprehensive overview of ASTM A403 WP316 stainless steel fittings, including their properties, advantages, and typical uses.
What is ASTM A403 WP316 Stainless Steel Fittings?
ASTM A403 WP316 stainless steel fittings are pipe fittings manufactured from grade 316 stainless steel, following the specifications of ASTM A403. ASTM A403 is a standard specification for wrought austenitic stainless steel fittings that are used for pressure piping systems. The “WP” in WP316 denotes the Wrought Product, indicating that these fittings are made by working the metal, such as by forging or bending, to achieve the desired shape.
Grade 316 stainless steel, often referred to as marine-grade stainless steel, is an austenitic steel alloy that contains chromium, nickel, and molybdenum. The molybdenum content in 316 stainless steel enhances its corrosion resistance, particularly against chloride environments, making it ideal for marine and chemical processing applications.

Properties of ASTM A403 WP316 Stainless Steel Fittings
The ASTM A403 WP316 stainless steel fittings possess a range of properties that make them suitable for various demanding environments:
- Corrosion Resistance: One of the most significant properties of WP316 stainless steel fittings is their excellent resistance to corrosion. The presence of molybdenum in the alloy composition significantly improves its resistance to pitting and crevice corrosion in chloride environments, such as seawater.
- High Strength: WP316 grade stainless steel fittings are known for their strength and toughness. They maintain their structural integrity even in high-pressure systems and at elevated temperatures, which makes them ideal for use in pressure piping systems.
- Heat Resistance: These fittings can withstand high temperatures, making them suitable for applications involving heat. They retain their mechanical properties in environments with temperatures as high as 870°C (1600°F), offering good oxidation resistance.
- Fabricability: WP316 stainless steel fittings are easy to fabricate, offering excellent weldability and formability. They can be welded using most conventional fusion methods without preheating, making installation more straightforward and cost-effective.
- Durability: The combination of corrosion resistance, high strength, and heat resistance ensures that ASTM A403 WP316 stainless steel fittings are highly durable, providing long service life even in harsh environments.
Advantages of ASTM A403 WP316 Stainless Steel Fittings
Choosing ASTM A403 WP316 stainless steel fittings comes with a variety of advantages that make them the preferred choice in various industries:
- Longevity: The superior corrosion resistance and durability of WP316 stainless steel fittings mean that they require less maintenance and replacement over time, reducing operational costs and downtime.
- Versatility: WP316 stainless steel fittings are used in a wide range of industries, including chemical processing, petrochemical, oil and gas, marine, food and beverage, and pharmaceutical industries. Their ability to withstand various environmental conditions makes them highly versatile.
- Hygiene: Stainless steel is a non-porous material, which makes it easy to clean and maintain. This property, combined with its resistance to corrosion, makes WP316 stainless steel fittings ideal for applications where hygiene is critical, such as in the food and beverage and pharmaceutical industries.
- Aesthetic Appeal: Beyond their functional benefits, WP316 stainless steel fittings also have an aesthetically pleasing appearance. The smooth, shiny surface of stainless steel adds a modern, clean look to any system or installation.
- Environmental Resistance: The fittings are resistant to various environmental factors, including extreme temperatures, corrosive substances, and pressure changes. This makes them ideal for both indoor and outdoor applications, as well as in harsh industrial settings.


Schedule and Size Chart
Nominal Pipe Size (NPS) | Outside Diameter (OD) | Wall Thickness (Sch 10) | Wall Thickness (Sch 40) | Wall Thickness (Sch 80) | Wall Thickness (Sch 160) |
1/2″ | 21.3 mm | 2.11 mm | 2.77 mm | 3.73 mm | 4.78 mm |
3/4″ | 26.7 mm | 2.11 mm | 2.87 mm | 3.91 mm | 5.56 mm |
1″ | 33.4 mm | 2.77 mm | 3.38 mm | 4.55 mm | 6.35 mm |
1 1/2″ | 48.3 mm | 2.77 mm | 3.68 mm | 5.08 mm | 7.14 mm |
2″ | 60.3 mm | 2.77 mm | 3.91 mm | 5.54 mm | 8.74 mm |
3″ | 88.9 mm | 3.05 mm | 5.49 mm | 7.62 mm | 11.13 mm |
4″ | 114.3 mm | 3.05 mm | 6.02 mm | 8.56 mm | 13.49 mm |
6″ | 168.3 mm | 3.40 mm | 7.11 mm | 10.97 mm | 18.26 mm |
8″ | 219.1 mm | 3.76 mm | 8.18 mm | 12.70 mm | 23.01 mm |
Mechanical Properties Chart
Property | Value |
Tensile Strength, min | 515 MPa (75 ksi) |
Yield Strength, min | 205 MPa (30 ksi) |
Elongation, min | 30% |
Hardness, max | 217 Brinell (HB) / 95 Rockwell B (HRB) |
Modulus of Elasticity | 193 GPa |
Poisson’s Ratio | 0.27 – 0.30 |
Specifications Chart
Specification | Details |
Standard | ASTM A403 |
Grade | WP316 |
Type | Wrought Austenitic Stainless Steel |
Form | Elbows, Tees, Reducers, Couplings, Caps, Crosses, Stub Ends |
Manufacturing Process | Hot forming, including bending, extruding, and forging |
Chemical Composition Chart
Element | Composition (%) |
Carbon (C) | 0.08 max |
Manganese (Mn) | 2.00 max |
Phosphorus (P) | 0.045 max |
Sulfur (S) | 0.030 max |
Silicon (Si) | 1.00 max |
Chromium (Cr) | 16.00 – 18.00 |
Nickel (Ni) | 10.00 – 14.00 |
Molybdenum (Mo) | 2.00 – 3.00 |
Nitrogen (N) | 0.10 max |
Iron (Fe) | Balance |
Physical Properties Chart
Property | Value |
Density | 8.00 g/cm³ |
Melting Point | 1371 – 1399°C (2500 – 2550°F) |
Specific Heat Capacity | 500 J/kg·K |
Thermal Conductivity | 16.2 W/m·K (at 100°C) |
Electrical Resistivity | 740 nΩ·m (at 20°C) |
Coefficient of Thermal Expansion | 16.0 µm/m·°C (at 20 – 100°C) |
Application Chart
Industry | Applications |
Chemical Processing | Pipe systems handling corrosive chemicals and acidic environments. |
Oil & Gas | Piping systems in offshore platforms, refineries, and petrochemical plants. |
Marine Industry | Seawater handling systems, shipbuilding, and offshore constructions. |
Pharmaceutical Industry | Clean and hygienic process systems, sterile water lines. |
Food & Beverage | Food processing, brewing, and dairy production lines. |
Water Treatment | Desalination plants, water purification systems, and pipelines. |
Power Generation | Steam lines, cooling systems, and nuclear power plants. |
Why Choose Amardeep Steel Centre LLP for your projects?
As a leading supplier of stainless steel ASTM A403 WP316 fittings, Amardeep Steel Centre LLP is dedicated to providing top-quality products that meet the highest standards. Here’s why you should choose us:
- Quality Assurance: All our WP316 stainless steel fittings are manufactured according to the ASTM A403 standard, ensuring they meet the required specifications for strength, durability, and corrosion resistance.
- Wide Range of Products: We offer a comprehensive range of WP316 stainless steel fittings, catering to various industrial needs and applications.
- Competitive Pricing: We provide high-quality products at competitive prices, ensuring value for money for our clients.
- Expert Support: Our team of experts is always available to provide technical support and guidance, helping you choose the right fittings for your specific needs.
- Global Reach: With a strong global presence, we can deliver our products to clients worldwide, ensuring timely and efficient service.
ASTM A403 WP316 Stainless Steel Fittings are the ideal choice for a wide range of industrial applications due to their exceptional properties and advantages. Whether you need fittings for chemical processing, marine applications, or any other industry, WP316 stainless steel fittings offer the durability, strength, and corrosion resistance required for long-term performance. At Amardeep Steel Centre LLP, we are committed to providing high-quality WP316 stainless steel fittings that meet your exact specifications, ensuring the success and longevity of your projects. Contact us today to learn more about our products and services.
Global Reach
Amardeep Steel Centre boasts a robust global presence, committed to delivering unparalleled service and quality to clients around the world. Our dedication to prompt delivery and exceptional customer care sets us apart in the industry. Major corporations across the USA, Europe, Asia, and other regions place their trust in our high-quality ASTM A403 WP316 Stainless Steel Fittings. This widespread trust underscores our reputation for reliability and excellence. By consistently meeting and exceeding the expectations of our international clientele, we continue to solidify our position as a leader in the global steel market.

Countries We Export To
UNITED STATES, EUROPE, UK, UAE, SAUDI ARABIA, OMAN, KUWAIT, JORDAN, QATAR, INDONESIA, MALAYSIA, BRAZIL, SPAIN, ITALY, FRANCE, GERMANY, BAHRAIN, SRI LANKA, AZERBAIJAN, AUSTRALIA, AUSTRIA, PHILIPPINES, TURKEY, RUSSIA, IRAN, IRAQ, CANADA, KOREA, JAPAN, YEMEN, FINLAND, ZIMBABWE, HUNGARY, PORTUGAL, VIETNAM, MOROCCO, THAILAND, SOUTH AFRICA, MEXICO, SINGAPORE, GREECE, KUWAIT, POLAND, NEW ZEALAND, SWEDEN, SWITZERLAND, BELGIUM, BHUTAN, BANGLADESH, TAIWAN, ROMANIA, CAMBODIA, KAZAKHSTAN, AFGHANISTAN.