GNR 521 Class

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GNR 521 Class (J22)
LNER Class J6
Grantham railway geograph-2349452-by-Ben-Brooksbank.jpg
J6 No. 4199 at Grantham 1947
Type and origin
Power type Steam
Designer Henry Ivatt
Builder Doncaster Works
Build date 1911
Total produced 110
 • Whyte 0-6-0
 • UIC C h2
Gauge 4 ft 8 12 in (1,435 mm) standard gauge
Driver dia. 5 ft 2 in (1,575 mm)
Loco weight 50 long tons 10 cwt (113,100 lb or 51.3 t)
Tender weight 43 long tons 2 cwt (96,500 lb or 43.8 t)
Fuel type Coal
Boiler pressure 170 lbf/in2 (1.17 MPa)
Cylinders Two, inside
Cylinder size 19 in × 26 in (483 mm × 660 mm)
Valve gear Stephenson
Valve type piston valves
Performance figures
Tractive effort 21,875 lbf (97.30 kN)
  • GN: 521 class
  • → GN: J22
  • → LNER: J6
Power class BR: 2P3F
Numbers GN: 521–610, 621–640
Disposition All scrapped

The Great Northern Railway 521 Class was a class of 0-6-0 steam locomotives, introduced in 1911. They were designed by Henry Ivatt for goods traffic. From 1912 to 1922 further examples, slightly modified by Nigel Gresley, were built and designated 536 Class. The most obvious difference was in the front sandboxes. These were below the running plate on the 521 but above it, and merged with the front splashers, on the 536. The London and North Eastern Railway classified them both as J6. These locomotives had superheaters and piston valves operated by Stephenson valve gear.


One hundred and ten locomotives passed to British Railways in 1948 and they were numbered 64170-64279. The J6s were withdrawn between 1955 and 1962 and none have been preserved.


Detail drawings and scale model kits are available from some suppliers.


  • Ian Allan ABC of British Railways Locomotives (1948 ed.). part 4, page 28. 

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