S31803 Seamless Pipe

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.