We have professional sales team numbered 200 with more than 16 years experience.
Home > Products > Stainless Steel > Stainless Steel Pipe
S31803 Seamless Pipe
S31803 Seamless Pipe
S31803 Seamless Pipe
S31803 Seamless Pipe

S31803 Seamless Pipe

Our Duplex Steel Seamless Pipe UNS S31803 has numerous features as excellence in corrosion, pitting resistance, stress resistance, high temperature, longevity, high hardness,
Product introduction
S31803 is a duplex stainless steel with a two-phase microstructure consisting of austenite and ferrite phases. It has excellent corrosion resistance and high strength, making it suitable for use in a variety of industries, including oil and gas, chemical processing and marine engineering.

Here are the chemical composition and mechanical properties of S31803 seamless pipe:

Chemical Composition:

Element Minimum (%) Maximum (%)
Chromium 21.0 23.0
Molybdenum 2.5 3.5
Nickel 4.5 6.5
Nitrogen 0.08 0.2
Carbon 0.03 -
Silicon 1.0 -
Manganese 2.0 -
Phosphorus 0.03 -
Sulfur 0.02 -

Mechanical Properties:

Property Value
Tensile Strength 620 MPa (90 ksi)
Yield Strength 450 MPa (65 ksi)
Elongation 25%
Hardness (Brinell) 290 HB max
Impact Toughness (Charpy V-Notch) 80 J (60 ft-lbf) at -50°C (-58°F)
1.Q: Are you a factory or trading company?
A: We are professional manufacturer, and our company also is a very professional a trade company for steel products.We can provide a wide range of steel products. 

2.Q:What do your factory do regarding quality control?
A: We have obtained ISO, CE and other certifications. From materials to products, we check every process to maintain good quality.

3.Q: Can I get samples before order ?
A: Yes, of course. Usually our samples are free. we can produce by your samples or technical drawings.

4.Q:How do you make our business long-term and good relationship?
A:We keep good quality and competitive price to ensure our customers benefit ; We respect every customer as our friend and we sincerely do business and make friends with them. No matter where they come from.

5.Q:what is your delivery time ?
A: Our delivery time is about one week, timing according to the number of customers.








* Name
* E-mail