API X70 vs. Lean Duplex
API X70 vs. Lean Duplex
(OP)
Hi Guys,
I have been asked to compare the two materials mentioned in the title. Could someone please help me come up with a list of the key differences between these two materials.
Any Help would be greatly appreciated
I'm looking for info regarding
1. Price
2. Hot Bending potential
3. Yield and tensile strength
4. Welding potential
5. Corrosion
Cheers guys!
I have been asked to compare the two materials mentioned in the title. Could someone please help me come up with a list of the key differences between these two materials.
Any Help would be greatly appreciated
I'm looking for info regarding
1. Price
2. Hot Bending potential
3. Yield and tensile strength
4. Welding potential
5. Corrosion
Cheers guys!





RE: API X70 vs. Lean Duplex
2. You cold bend SS, not hot. It will take serious forces to form LDX, but that is how it is done.
3. Look them up in the specs
4. common, fillers available and no issues
5. Define an environment. If we are talking about wet, CO2, HS2, and some minor amounts of chlorides then the LDX will have significantly better corrosion resistance, as in multiple times the life.
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Plymouth Tube
RE: API X70 vs. Lean Duplex
Steve Jones
Materials & Corrosion Engineer
http://www.linkedin.com/pub/8/83b/b04
RE: API X70 vs. Lean Duplex
I have been searching around our databases and can't find any mechanical info for any lean duplex steel. In fact, I could only find three lean duplex steels through this forum.
RE: API X70 vs. Lean Duplex
Another key point is: what specification will the 'lean duplex' be manufactured to and is it allowed by the adopted design code? For example, a subsea pipeline designed to DNV-OS-F-101 could not use 'lean duplex'.
Steve Jones
Materials & Corrosion Engineer
http://www.linkedin.com/pub/8/83b/b04
RE: API X70 vs. Lean Duplex
good luck
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Plymouth Tube
RE: API X70 vs. Lean Duplex
http://www.outokumpu.com/26807.epibrw
http://www.outokumpu.com/pages/Page____42266.aspx
http
the corrosion resistance of ldx 3101 is similar to SS 316
S
Corrosion Prevention & Corrosion Control
RE: API X70 vs. Lean Duplex