David Rintoul
Analyst · RBC Capital Markets
In summary, we are very pleased with our first quarter results, which gives us a strong start to the year. Pricing levels were strong and benefits somewhat from a small part -- and we've benefited somewhat from a small portion of our electrodes being sold on a spot basis at attractive price levels. The supply and demand relationship remains tight and we believe this will remain along with the subsequent influence upon pricing.
Looking ahead to the remainder of the year, we note that as a result of our 3- to 5-year contract initiative and other sales commitments, approximately 96% of our 2018 production capacity is now contracted or committed by purchase orders. The weighted average selling price of our currently contracted and committed orders for the remaining quarters of 2018 is expected to be approximately $9,650 per metric ton. This represents a combination of our 3- to 5-year take-or-pay contracts as well as other committed business for 2018, which was mostly negotiated in 2017.
Turning to cost. As you know, our vertical integration provides us with the majority of our needle coke requirements, while we purchase the remainder from third-party needle coke suppliers. As you're also aware, the third -- the cost of third-party needle coke has increased in 2018. As we previously shared with you during the IPO process, the increase on this portion of our needle coke requirements will begin to flow through our cost of goods sold in the second quarter. On the other hand, due to our hedging of decant oil, we expect the cost of producing our own needle coke to remain relatively stable.
Now let's turn to the current market dynamics. The global steel market remained strong and the overall production growth in the first quarter at 4.1% according to the World Steel Association. We estimate that electric arc furnace production growth in 2017 was 8% to 10%, resuming a long-term trend of EAF production growing faster than overall steel production.
The growth in EAF steel production continues to drive increased demand for electrodes. This strong demand, along with the limited supply of electrodes and needle coke, continued to cause tightness in the electrode and needle coke markets, resulting in a strong pricing environment. Pricing for petroleum needle coke continues to be elevated, reflecting strong demand from graphite electrode producers as well as lithium ion battery manufacturers.
Our vertically integrated business model continues to be a significant competitive advantage, with the majority of our coke coming from our Seadrift facility. Demand for electrodes remains strong and is above the levels that we are actually able to supply.
We have been very pleased with the success of our new commercial strategy. During the first quarter, 60% of our revenue was generated from these contracts. We expect the percentage of revenue from these contracts to be even higher for the remainder of the year.
Our electrode plants continue to run very efficiently. During the first quarter of 2018, we produced approximately 43,000 metric tons of electrodes and operated at a capacity utilization rate of approximately 98%. To enable this high level of capacity utilization, we have ongoing preventive maintenance programs at each of our facilities. In addition, we have an annual maintenance program, which we will perform in the third quarter.
We continue to make solid progress on our debottlenecking initiative, which remains on track to increase our annual production capacity by approximately 35,000 metric tons by the end of the year.
We also continue to have discussions with third-party providers regarding securing petroleum needle coke to feed our warm idle St. Marys graphite electrode manufacturing facility, and we will plan to provide an update on those discussions in upcoming quarters.
We are proud of the whole GrafTech team, which has been working diligently to execute our strategy. Our first quarter results demonstrate that we have the right plan in place and continue to drive value for all shareholders.
This concludes our prepared remarks. We'll now open up the call for questions.