15Cr3 steel billets
Low carbon chromium steel in the Indian designation, used for light case hardened parts.
Case Hardening Steel Billets
Case hardening steels are low carbon alloys that are carburised to give a hard surface over a tough core. They are the standard choice for gears, pinions and transmission parts.
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.
15Cr3EN8DCr16MnCr520MnCr516MnCrB520MnCrB5SCM415SCM420SCM420HSCM435HSAE 8617SAE 8620SAE 8622SAE 8640EN351EN352EN353EN354EN35515CrNi616CrNi420CrNi6SAE 4320
Chromium case hardening grades
EN8DCr steel billets
A chromium-modified EN8D listed in the steel grade chart. Confirm limits at enquiry.
Chrome manganese case hardening grades
16MnCr5 steel billets
About 0.14–0.19% C, 1.0–1.3% Mn, 0.8–1.1% Cr. A standard gear and shaft steel.
20MnCr5 steel billets
About 0.17–0.22% C, 1.1–1.4% Mn, 1.0–1.3% Cr. Gears, camshafts and transmission shafts.
16MnCrB5 steel billets
The boron-treated 16MnCr5, for improved hardenability.
20MnCrB5 steel billets
The boron-treated 20MnCr5, for improved hardenability.
SCM chromium-molybdenum case hardening grades (JIS)
SCM is the JIS G4053 designation for chromium-molybdenum steels. An H suffix means a guaranteed hardenability band.
SCM415 steel billets
Low carbon Cr-Mo steel, about 0.13–0.18% C, for case hardened parts.
SCM420 steel billets
About 0.18–0.23% C. Gears and shafts needing a hard case.
SCM420H steel billets
SCM420 with a guaranteed hardenability band.
SCM435H steel billets
About 0.33–0.38% C Cr-Mo steel with a hardenability band, for quenched and tempered parts.
Nickel-chromium-molybdenum case hardening grades
SAE 8617 steel billets
About 0.15–0.20% C Ni-Cr-Mo case hardening steel.
SAE 8620 steel billets
About 0.18–0.23% C. One of the most used case hardening grades for gears.
SAE 8622 steel billets
About 0.20–0.25% C. Slightly higher core strength than 8620.
SAE 8640 steel billets
About 0.38–0.43% C Ni-Cr-Mo steel, used through hardened.
EN351 steel billets
BS 970 EN35x series Ni-Cr-Mo case hardening steel.
EN352 steel billets
BS 970 EN35x series Ni-Cr-Mo case hardening steel.
EN353 steel billets
BS 970 EN35x series case hardening steel, close to the SAE 8620 family.
EN354 steel billets
BS 970 EN35x series Ni-Cr-Mo case hardening steel.
EN355 steel billets
BS 970 EN35x series Ni-Cr-Mo case hardening steel.
15CrNi6 steel billets
German chromium-nickel case hardening steel for gears and shafts.
16CrNi4 steel billets
Chromium-nickel case hardening steel for heavily loaded parts.
20CrNi6 steel billets
Chromium-nickel case hardening steel for gears and pinions.
SAE 4320 steel billets
About 0.17–0.22% C Ni-Cr-Mo case hardening steel.
Other grade families
Plain Carbon Steel BilletsCarbon Manganese Steel BilletsThrough Hardened Alloy 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.