The offer, if successful, will make Nickel Mines the second-largest ASX IPO of the year after Jupiter Mines raised $240 million in April.
Nickel Mines is offering 571.4 million shares at 35c per share to raise at least $200 million.
Bell Potter Securities is acting as lead manager with Canaccord Genuity as co-lead manager.
Sydney-based Nickel Mines was formed in 2007 by Norm Seckold and Peter Nightingale and holds 80% of the Hengjaya nickel mine in Sulawesi.
Local Indonesian partner the Wijoyo family owns the other 20% of the project.
Hengjaya has been in production since late 2015, supplying up to 60,000 tonnes per annum of ore grading more than 1.8% nickel.
The project has a resource of 57.7 million wet tonnes at 1.81% nickel.
Hengjaya is 12km to the south of the Indonesia Morowali Industrial Park, controlled by China's Tsingshan Group.
The company has a collaboration and subscription agreements with Tsingshan company Shanghai Decent and Shanghai Wanlu Investment Co over the funding and development of a two-line rotary kiln electric furnace (RKEF) at IMIP, a project in which Nickel Mines holds 25%.
Shanghai Decent and Wanlu hold 20% and 18.5% respectively of Nickel Mines, which will dilute to 11.6% and 10.7% following the IPO.
Funds raised in the IPO will be used to boost Hengjaya production, acquire an additional 35% in the RKEF project for $93.3 million, and for working capital.
Nickel Mines can move to 100% of the RKEF project for a further US$120 million.
The company is chaired by former New Hope Corporation managing director Robert Neale.
Indonesia specialist Justin Werner has been MD of Nickel Mines since 2012.
Seckold is executive deputy chairman, while Nightingale is executive director and chief financial officer.
Werner, Seckold and Nightingale are all directors of Collerina Cobalt.
Joining them on the board of Nickel Mines is Odyssey Resources Corp CEO James Crombie, Shanghai Decent chairman Weifeng Huang, Equus Resources chairman Mark Lochtenberg and Wanlu executive director Janyuan Xu.
Nickel Mines is aiming to list on August 2.
*Kristie Batten is editor of www.miningnews.net
