Exhibit 4.20

English translation

AMENDING AGREEMENT No. 3

to Non-Revolving Loan Facility Agreement No. 8507 dated October 9, 2012

The City of Moscow September 27, 2013

SBERBANK OF RUSSIA, an open joint stock company, organized and existing under the laws of the Russian Federation (company name in Russian: ) (the “Lender”), as represented by Andrei Yu. Goncharenko, Managing Director and Deputy Director of the Lending and Project Financing Group of the Financing Department of Sberbank of Russia, acting by virtue of the Lender’s Articles of Association and under Power of Attorney No. 259-D dated June7, 2013, on the one hand; and

SOUTHERN KUZBASS COAL COMPANY OAO, an open joint stock company, organized and existing under the laws of the Russian Federation (company name in Russian: ) (the “Borrower”), as represented by Stanislav A. Ploshchenko acting under a Power of Attorney dated February 27, 2013, certified by Olga S. Davydova, a notary public of the City of Moscow, and registered by the said notary in the register under Number 1-198, on the other hand;

the Lender and the Borrower being hereinafter collectively referred to as the “Parties” and, each individually, as a “Party”;

have entered into this amending agreement (the “Amending Agreement”) to the Non-Revolving Loan Facility Agreement No. 8507 dated October 9, 2012 (the “Loan Agreement”).

THE PARTIES HAVE AGREED AS FOLLOWS:

1. To restate Schedule 2 to the Loan Agreement in the form of Schedule 1 hereto.

2. Schedule 1 hereto shall be deemed incorporated unto and constitute an integral part hereof.

3. All the other terms and conditions of the Loan Agreement which are not amended hereby shall remain in full force and effect.

4. This Amending Agreement shall take effect as of the date it is executed by both Parties and shall be deemed incorporated unto and constitute an integral part of the Loan Agreement. Pursuant to Clause 2 of Article 425 of the Russian Civil Code, the Parties have agreed that Clause 1 hereof shall apply to the relations between the Parties starting from June 29, 2013.

5. This Amending Agreement is made in two (2) counterparts having equal legal force, one for the Lender and one for the Borrower.

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PARTIES’ LOCATION AND BANK DETAILS

LENDER:

Location and mailing address: 19 Vavilov Str., Moscow 117997, Russia ( )

Taxpayer Number (INN): 7707083893

Company Number (OGRN): 1027700132195

Taxpayer Record Validity Code (KPP): 775001001

Russian National Company and Business Classification Code (OKPO): 00032537

For payments in RUR: Account No. 30301810500001000014; Correspondent Account No. 30101810400000000225 with OPERU of the Moscow GTU of the Bank of Russia; BIC 044525225

For payments in USD:

Account No. 30301840800001000014 with Sberbank, Moscow, SWIFT SABRRUMM

(HEAD OFFICE – ALL OFFICES in RUSSIA)

BANK OF NEW YORK MELLON NEW YORK, NY, SWIFT IRVT US 3N

For payments in EUR:

Account No. 30301978400001000014 with Sberbank, Moscow, SWIFT SABRRUMM

(HEAD OFFICE – ALL OFFICES in RUSSIA)

DEUTSCHE BANK AG FRANKFURT AM MAIN, SWIFT DEUTDEFF

Tel: (495) 747-3381; 957-5563; Fax: (495) 957-5561

BORROWER:

Location: 6 Yunosti Str., Mezhdurechensk, Kemerovo Region, 652877, Russia ( )

Mailing address: 6 Yunosti Str., Mezhdurechensk, Kemerovo Region, 652877, Russia ( )

Taxpayer Number (INN): 4214000608

Company Number (OGRN): 1024201388661

Ruble Account No. 40702810026070100405 with Mezhdurechensky Branch No. 7763 of the Siberia Bank of the Sberbank of Russia

Tel: (384) 757-4370; Fax: (384) 757-4397

Email: mechel@mechel.com

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PARTIES’ SIGNATURES

LENDER	BORROWER
Managing Director Deputy Director of the Lending and Project Financing Group of the Financing Department Sberbank of Russia	Under Power of Attorney
/s/ Andrei Yu. Goncharenko	/s/ Stanislav A. Ploshchenko
/seal/	/seal/

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Schedule 1 to Amending Agreement 3

dated September 27, 2013 to

Non-Revolving Loan Facility Agreement No. 8507

dated October 9, 2012

Schedule 2 to Non-Revolving Loan Facility Agreement No. 8507

dated October 9, 2012

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PARTIES’ SIGNATURES

LENDER	BORROWER
Managing Director Deputy Director of the Lending and Project Financing Group of the Financing Department Sberbank of Russia	Under Power of Attorney
/s/ Andrei Yu. Goncharenko	/s/ Stanislav A. Ploshchenko
/seal/	/seal/

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