Rail

1. A rail having a chemical composition comprising, by mass %:

C: 0.75% to 1.20%;

Si: 0.10% to 2.00%;

Mn: 0.10% to 2.00%;

P: 0.0250% or less;

S: 0.0250% or less;

Cr: 0% to 2.00%;

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%;

V: 0% to 0.50%;

Nb: 0% to 0.050%;

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%;

N: 0% to 0.0200%; and

Al: 0% to 1.00%, the remainder being Fe and impurities,

wherein the rail includes,

a top head which is a flat region extending along a longitudinal direction of the rail and is located at a top of a head of the rail,

a side head which is a flat region extending along the longitudinal direction of the rail and is located at a side of the head of the rail,

a corner head which is a region including a rounded corner extending between the top head and the side head along the longitudinal direction of the rail, and an upper half of the side head, and

a surface of the top head of the rail which is a region including a surface of the top head and a surface of the corner head, wherein

in a range from the surface of the head of the rail to a depth of 30 mm, 95% or more of a structure is composed of a pearlite structure by area %, and

in a range with a depth of 20 mm to 30 mm from the surface, an average grain size of a pearlite block in a transverse section is 120 μm to 200 μm.

2. The rail according to claim 1 ,

wherein in a range with a depth of 20 mm to 30 mm from the surface of the head of the rail, average hardness is Hv 350 to Hv 460.

3. The rail according to claim 1 ,

wherein the chemical composition further includes, by mass %, one or more kinds of

Cr: 0.01% to 2.00%;

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%;

V: 0.005% to 0.50%;

Nb: 0.0010% to 0.050%;

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%;

N: 0.0060% to 0.0200%; and

Al: 0.0100% to 1.00%.

4. The rail according to claim 2 ,

wherein the chemical composition further includes, by mass %, one or more kinds of

Cr: 0.01% to 2.00%;

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%;

V: 0.005% to 0.50%;

Nb: 0.0010% to 0.050%;

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%;

N: 0.0060% to 0.0200%; and

Al: 0.0100% to 1.00%.