We delivered $205.9 million of adjusted EBITDA in 2020, exceeding our revised guidance range of $190 million to $200 million.
Earlier this year, we announced the companywide cost savings initiative, which we anticipate will result in approximately $10 million of annualized savings.
The domestic coke operations contributed $217 million to adjusted EBITDA in 2020, which exceeded the revised guidance range for domestic coke.
Another significant achievement for SunCoke in 2020 is the extension of existing contracts at Jewell, Haverhill 1 and Haverhill 2.
Looking at our capital structure and deployment of free cash flow in 2020, we reduced gross debt by $110 million and net debt by approximately $61 million.
This includes the opportunistic open-market purchases of approximately $63 million face value senior notes.
Additionally, we paid a $0.24 per share annual dividend and repurchased 1.6 million shares during the first quarter.
The fourth quarter net loss attributable to SXC was $0.06 per share, down $0.04 versus the fourth quarter of 2019.
On a GAAP basis, our full year 2020 net income attributable to SXC was $0.04 per share, up $2.02 versus the full year of 2019.
As a reminder, full year 2019 results included a $2.27 per share impairment charge recorded to Logistics goodwill and long-lived asset at CMT. After adjusting for these charges, 2020 diluted earnings per share was $0.25 lower than the prior year, due primarily to lower volumes at both the domestic coke and logistics segments.
Consolidated adjusted EBITDA for the fourth quarter of 2020 was $37 million, down $13.8 million versus the fourth quarter of 2019.
On a full year basis we delivered adjusted EBITDA of $205.9 million, down $42 million versus the full year of 2019.
Coke operations were down $12.2 million due to lower volumes, which were partially offset by lower operating costs.
In exchange for the extension of several coke contracts, we agreed to reduce our coke production in 2020 by approximately 550,000 tons.
Logistics operations were $1.8 million lower quarter-over-quarter due to lower volumes as well as lower pricing, which was offset partially by lower operating costs.
Corporate and other expenses were higher by $2.9 million quarter-over-quarter, mainly due to higher non-cash legacy liability expense.
Full year 2020 adjusted EBITDA was $205.9 million down $42 million compared to the prior year.
The Domestic Coke segment delivered full-year adjusted EBITDA of approximately $217 million, which was well above our full year revised Domestic Coke guidance.
Including Brazil, our coke operations delivered adjusted EBITDA of $230.5 million.
Adjusted EBITDA of the Logistics segment decreased $25.3 million year-over-year, primarily as a result of the Chapter 11 bankruptcy of Foresight Energy and the subsequent rejection of the contract with CMT. Finally, our corporate and other segment was unfavorable by $4.5 million.
As Mike highlighted, we generated very strong operating cash flow, approximately $158 million in the year, which was above our full year revised guidance range of $116 million to $136 million.
Capex of $74 million was spent during the year, which was below our guidance and included close to $11 million for foundry related expansion work.
During the year we spent approximately $104 million of cash to reduce debt outstanding by $110 million.
This includes repurchasing $62.7 million face value SXCP notes at a discount.
As we have consistently indicated our long-term goal is to reduce our gross leverage ratio down to 3 times or lower.
We repurchased approximately 1.6 million shares for $7 million during the first quarter.
We also paid a total of $0.24 per share dividend in 2020 which was the use of cash of approximately $20 million.
In total, we ended 2020 with a cash balance of approximately $48 million and a strong liquidity position of approximately $348 million, setting the stage for continued progress against our capital allocation priorities in 2021.
Prior to the pandemic, utilization rates were stable at around 80%, reflecting good fundamental demand.
As the coronavirus took hold, capacity utilization [Indecipherable] dramatically to a low of 52% with all major integrated steel producers shutting down blast furnaces.
API2 prices increased by approximately 15% in the fourth quarter versus the prior quarter.
We expect 2021 adjusted EBITDA to be between $215 million and $230 million.
Domestic Coke will contribute an incremental $2 million to $7 million in 2021 as we run our Domestic Coke fleet at full capacity with uncontracted capacity being sold into the export and foundry markets.
Turning to Logistics segment, we expect logistics to contribute an additional $3 million to $8 million in 2021.
Lastly, we expect our Corporate and Other segment to be better by approximately $4 million to $8 million.
In 2021, we expect our Domestic Coke adjusted EBITDA will be between $219 million and $224 million with sales of approximately 4.1 million tons.
Approximately 3.85 million tons are contracted under long-term take-or-pay agreements.
For example, due to the differences in the production price -- process, a single ton of foundry coke replaces approximately 2 tons of blast furnace coke.
These differences are reflected in our sales estimates of 4.1 million tons.
The total sales volume for foundry and export coke is expected to be between 250,000 tons and 270,000 tons, which is the blast furnace equivalent of approximately 400,000 tons.
2021 Logistics adjusted EBITDA is expected to be between $20 million and $25 million, an increase of $3 million to $8 million versus 2020.
As discussed earlier, we have a new contract with Javelin, which included a 4 million ton take-or-pay volume agreement for 2021 and 3 million tons for 2022.
Given the current coal export market and looking at the API2 forward curve, we are projecting between 4 million tons and 5 million tons of coal to be exported from CMT in 2021.
Our value estimates include between 2.5 million to 3 million tons of non-coke throughput such as pet coke, aggregates and iron ore.
We expect to handle 10.5 million tons through our domestic coal terminals in 2021 versus approximately 9.5 million tons handled in 2020.
Once again, we expect adjusted EBITDA to be between $215 million and $230 million in 2021.
We anticipate our capex requirement in 2021 will be around $80 million.
Our free cash flow is expected to be between $80 million and $100 million after taking into account cash interest, cash taxes, capital expenditures and minimal working capital changes.

Summary:
The fourth quarter net loss attributable to SXC was $0.06 per share, down $0.04 versus the fourth quarter of 2019.
Prior to the pandemic, utilization rates were stable at around 80%, reflecting good fundamental demand.
We expect 2021 adjusted EBITDA to be between $215 million and $230 million.
In 2021, we expect our Domestic Coke adjusted EBITDA will be between $219 million and $224 million with sales of approximately 4.1 million tons.
These differences are reflected in our sales estimates of 4.1 million tons.
Once again, we expect adjusted EBITDA to be between $215 million and $230 million in 2021.
We anticipate our capex requirement in 2021 will be around $80 million.
Our free cash flow is expected to be between $80 million and $100 million after taking into account cash interest, cash taxes, capital expenditures and minimal working capital changes.