Rail

1. A rail comprising, as a chemical composition, in terms of mass %:

C: 0.75% to 0.85%;

Si: 0.10% to 1.00%;

Mn: 0.30% to 1.20%;

Cr: 0.20% to 0.80%;

V: 0.01% to 0.20%;

N: 0.0040% to 0.0200%;

Mo: 0% to 0.50%;

Co: 0% to 1.00%;

B: 0% to 0.0050%;

Cu: 0% to 1.00%;

Ni: 0% to 1.00%;

Nb: 0% to 0.0500%;

Ti: 0% to 0.0500%;

Mg: 0% to 0.0200%;

Ca: 0% to 0.0200%;

REM: 0% to 0.0500%;

Zr: 0% to 0.0200%;

Al: 0% to 1.00%;

P≤0.0250%;

S≤0.0250%; and

Fe and impurities as a remainder,

wherein the chemical composition of the rail satisfies the following Expressions 1 and 2,

a structure of a range between an outer surface of a head portion as an origin and a depth of 25 mm includes 95% or greater of a pearlite structure and a hardness of the structure is Hv 350 to 480,

50 to 500 V carbonitride having an average grain size of 5 to 20 nm are present per 1.0 μm 2 of an area to be inspected in a transverse cross section at a position having the depth of 25 mm from the outer surface of the head portion, and

the value obtained by subtracting a hardness of the position having the depth of 25 mm from the outer surface of the head portion from a hardness of a position having a depth of 2 mm from the outer surface of the head portion is Hv 0 to Hv 40, and

wherein when a number of carbon atoms is defined as CA and a number of nitrogen atoms is defined as NA in the V carbonitride, a ratio CA/NA which is a ratio of CA to NA is 0.70 or less,

1.00< Mn/Cr≤ 4.00  Expression 1,

0.30≤0.25× Mn+Cr≤ 1.00  Expression 2,

here, the symbols of elements described in the Expressions 1 and 2 indicate the content of each element in terms of mass %.

2. The rail according to claim 1 , comprising, in terms of mass %, at least one selected from the group consisting of:

Mo: 0.01% to 0.50%;

Co: 0.01% to 1.00%;

B: 0.0001% to 0.0050%;

Cu: 0.01% to 1.00%;

Ni: 0.01% to 1.00%;

Nb: 0.0010% to 0.0500%;

Ti: 0.0030% to 0.0500%;

Mg: 0.0005% to 0.0200%;

Ca: 0.0005% to 0.0200%;

REM: 0.0005% to 0.0500%;

Zr: 0.0001% to 0.0200%; and

Al: 0.0100% to 1.00%.