	US 11,883,906 B2
	High manganese steel pipe with step-out weld zone erosion-corrosion resistance and method of making the same
HyunWoo Jin, Easton, PA (US); Ning Ma, Whitehouse Station, NJ (US); Adnan Ozekcin, Bethel Park, PA (US); Andrew J. Wasson, Spring, TX (US); Douglas P. Fairchild, Sugar Land, TX (US); IIWook Han, Pohang (KR); Sangchul Lee, Pohang (KR); Bongkeun Lee, Pohang (KR); and Jongsub Lee, Seoul (KR)
Assigned to EXXONMOBIL RESEARCH AND ENGINEERING COMPANY, Annandale, NJ (US); and POSCO, Pohang-Si (KR)
Filed by EXXONMOBIL RESEARCH AND ENGINEERING COMPANY, Annandale, NJ (US); and POSCO, Pohang-Si (KR)
Filed on Nov. 4, 2019, as Appl. No. 16/672,960.
Application 16/672,960 is a division of application No. 15/584,860, filed on May 2, 2017, granted, now 10,493,570.
Claims priority of provisional application 62/330,400, filed on May 2, 2016.
Prior Publication US 2020/0086432 A1, Mar. 19, 2020
Int. Cl. B23K 35/02 (2006.01); B23K 35/30 (2006.01); B23K 9/18 (2006.01); B23K 9/23 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/42 (2006.01); C22C 38/44 (2006.01); C22C 38/58 (2006.01)

CPC B23K 35/3073 (2013.01) [B23K 9/186 (2013.01); B23K 9/23 (2013.01); B23K 35/0261 (2013.01); C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/42 (2013.01); C22C 38/44 (2013.01); C22C 38/58 (2013.01)]

12 Claims

1. A metal cored wire for submerged arc welding, the wire comprising a steel sheath and a core,

with the core comprising powders of:

carbon in a range of 0.8 wt. % to 1.2 wt. %;

silicon in a range of 0.1 wt. % to 3.0 wt. %;

manganese in a range of 9.0 wt. % to 30 wt. %;

chromium in an amount less than 8 wt. %;

nickel in an amount less than 6 wt. %;

molybdenum in an amount less than 6 wt. %;

tungsten in an amount less than 5 wt. %;

copper in an amount less than 4 wt. %;

niobium in an amount less than 2 wt. %;

vanadium in an amount less than 2 wt. %;

titanium in a range of 0.2 wt. to 2 wt. %;

nitrogen in an amount less than 0.4 wt. %;

boron in an amount less than 1 wt. %;

at least one of:

i. sulfur in an amount less than 0.3 wt. %;

ii. phosphorous in an amount less than 0.03 wt. %; or

a combination thereof; and

the balance with iron.