Orton Pyrometric Cones

Temperature Equivalents (°F)

Large Cones (2½” High) – $8.50 per box of 50
Small Cones (1¼” High) – $7.10 per box of 50
Bars – $7.30 per box of 50
Large Self-Supporting Cones – $7.00 per box of 25

(Sold only in full boxes of one cone number)

Heating rate °F per hour (last 200° of firing)

Cone108 Large Cone270 Large Cone540 Small Cone
022N/AN/A1166
021N/AN/A1189
020N/AN/A1231
019124912791333
018131413501386
017135714021443
016141614611517
015145015011549
014148515371598
013153915781616
012157616161652
011160316381679
010164816751686
09168317021751
08172817491801
07178318051846
06182318521873
05 1/2185418731909
05188619151944
04194019582008
03198720142068
02201420482098
01204320792152
1207721092163
2208821242174
3210621342185
4212021582208
5216322012230
5 1/221942233N/A
6222822662291
7225922912307
8227723162372
9229523322403
10234023772426
11235923942437
12237924152471
1324102455N/A
1425302491N/A