40Cr4 steel billets
About 0.40% C with about 1% Cr. Quenched and tempered shafts and bolts.
Through Hardened Alloy Steel Billets
Through hardened steels are quenched and tempered to give strength and toughness across the whole section. They carry the load in shafts, crankshafts, oil field parts and heavy fasteners.
Supplied as continuous cast billets and blooms, 100 × 100 to 250 × 250 mm and 200 mm round, in lengths up to 12 m. Send the grade, standard, section and length for a quotation. Chemistry is certified on the heat test certificate.
40Cr441Cr437Cr4EN18EN18CEN18D25CrMo442CrMo4SAE 4130SAE 4135SAE 4140SAE 4142SAE 4150EN19EN19CSAE 4340EN24EN16EN16D
Chromium through hardening grades
41Cr4 steel billets
About 0.38–0.45% C with about 1% Cr. Close to EN18 and SAE 5140.
37Cr4 steel billets
About 0.37% C with about 1% Cr. Quenched and tempered parts.
EN18 steel billets
BS 970 chromium steel, close to 41Cr4 and SAE 5140.
EN18C steel billets
A variant of EN18. Order against the stated limits.
EN18D steel billets
A variant of EN18. Order against the stated limits.
Chromium-molybdenum grades
25CrMo4 steel billets
Chrome-moly steel close to SAE 4130, used for pressure parts and welded forgings.
42CrMo4 steel billets
The EN 10083 designation of the 4140 family. Widely specified for export orders.
SAE 4130 steel billets
About 0.28–0.33% C chrome-moly steel with good weldability.
SAE 4135 steel billets
About 0.33–0.38% C chrome-moly steel.
SAE 4140 steel billets
About 0.38–0.43% C chrome-moly steel. One of the most traded alloy grades.
SAE 4142 steel billets
About 0.40–0.45% C chrome-moly steel, slightly stronger than 4140.
SAE 4150 steel billets
About 0.48–0.53% C chrome-moly steel for higher strength and wear.
EN19 steel billets
BS 970 chrome-moly steel, close to SAE 4140 and 42CrMo4.
EN19C steel billets
A variant of EN19. Order against the stated limits.
Nickel and manganese-molybdenum grades
SAE 4340 steel billets
About 0.38–0.43% C Ni-Cr-Mo steel with deep hardenability and toughness.
EN24 steel billets
BS 970 Ni-Cr-Mo steel, close to SAE 4340. For heavy shafts and highly stressed parts.
EN16 steel billets
BS 970 manganese-molybdenum steel for quenched and tempered shafts and gears.
EN16D steel billets
A variant of EN16. Order against the stated limits.
Other grade families
Plain Carbon Steel BilletsCarbon Manganese Steel BilletsCase Hardening Steel BilletsASTM A182 Chrome Moly Pressure Grade BilletsSpring, Bearing and Special Steel BilletsStainless and Tool Steel Billets
See also steel billet specifications and the billet size chart.