#304vs316

Stainless Steel (SS) flanges play a crucial role in industrial piping, chemical processing, and mechanical engineering. However, SS 304 and SS 316 have distinct characteristics that make them suitable for different applications. Understanding flange size charts, PCD charts, and pressure ratings will help in selecting the right stainless steel grade for your needs.

This guide includes:

What is SS 304 and SS 316?

Key differences between SS 304 and SS 316

Flange size chart and PCD chart comparison

Pressure ratings for SS 304 and SS 316 flanges

Why choose Udhhyog for premium stainless steel flanges?

What is SS 304?

SS 304 is an austenitic stainless steel composed of:

18% Chromium (Cr) – Provides corrosion resistance.

8% Nickel (Ni) – Enhances strength and durability.

Low Carbon Content – Improves weldability.

Advantages of SS 304:

✅ Good corrosion resistance in mild environments. ✅ Cost-effective and widely available. ✅ Ideal for general-purpose applications like food processing, kitchenware, and structural elements.

What is SS 316?

SS 316 is an upgraded version of SS 304 with the addition of molybdenum (Mo). It contains:

16-18% Chromium (Cr) – Provides oxidation and rust resistance.

10-14% Nickel (Ni) – Enhances strength and toughness.

2-3% Molybdenum (Mo) – Increases resistance to pitting and crevice corrosion.

Advantages of SS 316:

✅ Superior corrosion resistance in marine and acidic environments. ✅ High temperature and pressure tolerance. ✅ Commonly used in chemical plants, medical equipment, and marine structures.

Difference Between SS 304 and SS 316

FeatureSS 304SS 316Composition18% Chromium, 8% Nickel16% Chromium, 10% Nickel, 2% MolybdenumCorrosion ResistanceGoodExcellent, especially against chloride exposureStrengthHighSlightly higher than SS 304ApplicationsGeneral-purpose use, food industryMarine, chemical, and pharmaceutical industriesCostMore affordableSlightly expensive due to molybdenum content

SS 304 & SS 316 Flange Size Chart (in mm)

SS flanges follow ASME B16.5, ANSI, and DIN standards. Below is a stainless steel flange size chart.Nominal Pipe Size (NPS)Flange Outer Diameter (mm)Bolt Hole Diameter (mm)Number of Bolts2"1501943"1751944"2301986"280228100mm210198150mm280228

For a detailed dimensions chart and PDF download, visit Udhhyog.

SS Flange PCD Chart

PCD (Pitch Circle Diameter) refers to the diameter of the circle passing through the center of bolt holes. Below is a reference SS flange PCD chart.Flange SizePCD (mm)Bolt Hole Diameter (mm)2-inch120193-inch152194-inch190196-inch24122100mm21519150mm28022

Pressure Ratings for SS 304 and SS 316 Flanges

SS flange pressure ratings vary based on temperature and material composition. Below is a general pressure rating comparison.Flange ClassSS 304 Pressure Rating (PSI)SS 316 Pressure Rating (PSI)Class 150285290Class 300740750Class 6001,4801,500Class 9002,2202,250Class 15003,7053,750Class 25006,1706,200

Why Choose Udhhyog for SS Flanges?

✅ High-Quality SS 304 & SS 316 Flanges – Manufactured as per ASME, ANSI, and IS standards. ✅ Customization Available – Flanges tailored for industrial needs. ✅ Competitive Rates – Best pricing for bulk and custom orders. ✅ Reliable Supply Chain – Serving Delhi, Haryana, UP, and J&K.

For stainless steel flanges at competitive prices, trust Udhhyog – your reliable industrial supplier.

Conclusion

Both SS 304 and SS 316 flanges offer excellent performance, but SS 316 provides superior corrosion resistance, especially in marine and chemical environments. Understanding flange size charts, PCD charts, and pressure ratings helps in choosing the right material. Udhhyog supplies high-quality stainless steel flanges, from 2-inch to 150mm sizes, meeting Class 150 to Class 2500 standards.

Stainless Steel (SS) flanges play a crucial role in industrial piping, chemical processing, and mechanical engineering. However, SS 304 and SS 316 have distinct characteristics that make them suitable for different applications. Understanding flange size charts, PCD charts, and pressure ratings will help in selecting the right stainless steel grade for your needs.

This guide includes:

What is SS 304 and SS 316?

Key differences between SS 304 and SS 316

Flange size chart and PCD chart comparison

Pressure ratings for SS 304 and SS 316 flanges

Why choose Udhhyog for premium stainless steel flanges?

What is SS 304?

SS 304 is an austenitic stainless steel composed of:

18% Chromium (Cr) – Provides corrosion resistance.

8% Nickel (Ni) – Enhances strength and durability.

Low Carbon Content – Improves weldability.

Advantages of SS 304:

✅ Good corrosion resistance in mild environments. ✅ Cost-effective and widely available. ✅ Ideal for general-purpose applications like food processing, kitchenware, and structural elements.

What is SS 316?

SS 316 is an upgraded version of SS 304 with the addition of molybdenum (Mo). It contains:

16-18% Chromium (Cr) – Provides oxidation and rust resistance.

10-14% Nickel (Ni) – Enhances strength and toughness.

2-3% Molybdenum (Mo) – Increases resistance to pitting and crevice corrosion.

Advantages of SS 316:

✅ Superior corrosion resistance in marine and acidic environments. ✅ High temperature and pressure tolerance. ✅ Commonly used in chemical plants, medical equipment, and marine structures.

Difference Between SS 304 and SS 316

FeatureSS 304SS 316Composition18% Chromium, 8% Nickel16% Chromium, 10% Nickel, 2% MolybdenumCorrosion ResistanceGoodExcellent, especially against chloride exposureStrengthHighSlightly higher than SS 304ApplicationsGeneral-purpose use, food industryMarine, chemical, and pharmaceutical industriesCostMore affordableSlightly expensive due to molybdenum content

SS 304 & SS 316 Flange Size Chart (in mm)

SS flanges follow ASME B16.5, ANSI, and DIN standards. Below is a stainless steel flange size chart.Nominal Pipe Size (NPS)Flange Outer Diameter (mm)Bolt Hole Diameter (mm)Number of Bolts2"1501943"1751944"2301986"280228100mm210198150mm280228

For a detailed dimensions chart and PDF download, visit Udhhyog.

SS Flange PCD Chart

PCD (Pitch Circle Diameter) refers to the diameter of the circle passing through the center of bolt holes. Below is a reference SS flange PCD chart.Flange SizePCD (mm)Bolt Hole Diameter (mm)2-inch120193-inch152194-inch190196-inch24122100mm21519150mm28022

Pressure Ratings for SS 304 and SS 316 Flanges

SS flange pressure ratings vary based on temperature and material composition. Below is a general pressure rating comparison.Flange ClassSS 304 Pressure Rating (PSI)SS 316 Pressure Rating (PSI)Class 150285290Class 300740750Class 6001,4801,500Class 9002,2202,250Class 15003,7053,750Class 25006,1706,200

Why Choose Udhhyog for SS Flanges?

✅ High-Quality SS 304 & SS 316 Flanges – Manufactured as per ASME, ANSI, and IS standards. ✅ Customization Available – Flanges tailored for industrial needs. ✅ Competitive Rates – Best pricing for bulk and custom orders. ✅ Reliable Supply Chain – Serving Delhi, Haryana, UP, and J&K.

For stainless steel flanges at competitive prices, trust Udhhyog – your reliable industrial supplier.

Conclusion

Both SS 304 and SS 316 flanges offer excellent performance, but SS 316 provides superior corrosion resistance, especially in marine and chemical environments. Understanding flange size charts, PCD charts, and pressure ratings helps in choosing the right material. Udhhyog supplies high-quality stainless steel flanges, from 2-inch to 150mm sizes, meeting Class 150 to Class 2500 standards.

Stainless Steel (SS) flanges play a crucial role in industrial piping, chemical processing, and mechanical engineering. However, SS 304 and SS 316 have distinct characteristics that make them suitable for different applications. Understanding flange size charts, PCD charts, and pressure ratings will help in selecting the right stainless steel grade for your needs.

This guide includes:

What is SS 304 and SS 316?

Key differences between SS 304 and SS 316

Flange size chart and PCD chart comparison

Pressure ratings for SS 304 and SS 316 flanges

Why choose Udhhyog for premium stainless steel flanges?

What is SS 304?

SS 304 is an austenitic stainless steel composed of:

18% Chromium (Cr) – Provides corrosion resistance.

8% Nickel (Ni) – Enhances strength and durability.

Low Carbon Content – Improves weldability.

Advantages of SS 304:

✅ Good corrosion resistance in mild environments. ✅ Cost-effective and widely available. ✅ Ideal for general-purpose applications like food processing, kitchenware, and structural elements.

What is SS 316?

SS 316 is an upgraded version of SS 304 with the addition of molybdenum (Mo). It contains:

16-18% Chromium (Cr) – Provides oxidation and rust resistance.

10-14% Nickel (Ni) – Enhances strength and toughness.

2-3% Molybdenum (Mo) – Increases resistance to pitting and crevice corrosion.

Advantages of SS 316:

✅ Superior corrosion resistance in marine and acidic environments. ✅ High temperature and pressure tolerance. ✅ Commonly used in chemical plants, medical equipment, and marine structures.

Difference Between SS 304 and SS 316

FeatureSS 304SS 316Composition18% Chromium, 8% Nickel16% Chromium, 10% Nickel, 2% MolybdenumCorrosion ResistanceGoodExcellent, especially against chloride exposureStrengthHighSlightly higher than SS 304ApplicationsGeneral-purpose use, food industryMarine, chemical, and pharmaceutical industriesCostMore affordableSlightly expensive due to molybdenum content

SS 304 & SS 316 Flange Size Chart (in mm)

SS flanges follow ASME B16.5, ANSI, and DIN standards. Below is a stainless steel flange size chart.Nominal Pipe Size (NPS)Flange Outer Diameter (mm)Bolt Hole Diameter (mm)Number of Bolts2"1501943"1751944"2301986"280228100mm210198150mm280228

For a detailed dimensions chart and PDF download, visit Udhhyog.

SS Flange PCD Chart

PCD (Pitch Circle Diameter) refers to the diameter of the circle passing through the center of bolt holes. Below is a reference SS flange PCD chart.Flange SizePCD (mm)Bolt Hole Diameter (mm)2-inch120193-inch152194-inch190196-inch24122100mm21519150mm28022

Pressure Ratings for SS 304 and SS 316 Flanges

SS flange pressure ratings vary based on temperature and material composition. Below is a general pressure rating comparison.Flange ClassSS 304 Pressure Rating (PSI)SS 316 Pressure Rating (PSI)Class 150285290Class 300740750Class 6001,4801,500Class 9002,2202,250Class 15003,7053,750Class 25006,1706,200

Why Choose Udhhyog for SS Flanges?

✅ High-Quality SS 304 & SS 316 Flanges – Manufactured as per ASME, ANSI, and IS standards. ✅ Customization Available – Flanges tailored for industrial needs. ✅ Competitive Rates – Best pricing for bulk and custom orders. ✅ Reliable Supply Chain – Serving Delhi, Haryana, UP, and J&K.

For stainless steel flanges at competitive prices, trust Udhhyog – your reliable industrial supplier.

Conclusion

Both SS 304 and SS 316 flanges offer excellent performance, but SS 316 provides superior corrosion resistance, especially in marine and chemical environments. Understanding flange size charts, PCD charts, and pressure ratings helps in choosing the right material. Udhhyog supplies high-quality stainless steel flanges, from 2-inch to 150mm sizes, meeting Class 150 to Class 2500 standards.