Forged steel bar SCM440/EN19

Model Number: hot forged steel bar -48 Brand Name: Unite Steel Key Specifications/Special Features: Forged steel bar SCM440/EN19Description: 4140 is a 1% chromium - molybdenum medium hardenability general purpose high tensile steel - generally supplied hardened and tempered in the tensile range of 850 - 1000Mpa (condition T).4140 is now available with improved machinability, which greatly increases feeds and/or speeds, while also extending tool life without adversely affecting mechanical properties.Pre hardened and tempered 4140 can be further surface hardened by flame or induction hardening and by nitriding.Applications:
It is the most commonly used of the high tensile steels with a wide range of applications in automotive, gear and engine construction, crankshafts, steering knuckles, connecting rods, spindles, Intermediate gears, pump and gear shafts, axles, nuts and bolts, bearing, gear, transmission gear, supercharger gear, engine cylinder, spring, 1200mm-2000mm rotary shouldered connections for petroleum industry, jar knocker.




Related specifications:

Australia AS 1444-2007 4140

AMS 6378, AMS 6379 , AMS 6381B , AMS 6382 , AMS 6382G , AMS 6390 , AMS 6390A , AMS 6395

Germany DIN 17212 W.Nr. 1.7223 Type 41CrMo4

DIN 17200 1654 W.Nr 1.7225 Type 42CrMo4

DIN 17200 W.Nr 1.7227 Type CrMoS4

EN10083 11991 1.7225 42CrMo4

Great Britain BS970 1955 EN19A

BS970 Part 3:1991708M40 or 709M40 or 708 A 42

Sweden: SS 2244

France AFNOR 40 CD 4 , AFNOR 42 CD 4

Italy: UNI 38 CrMo 4 KB , UNI 40 CrMo 4 , UNI G 40 CrMo 4

USA ASTM A29A29M91 4140

ASTM A322 4140

ASTM A331 4140 cold finish

SAE 4140, SAE J404 , SAE J412 , SAE J770 , UNS G41400

ASTM A331 , ASTM A505 , ASTM A519 , ASTM A547 , ASTM A646 ,

MIL SPEC MILS1 6974 ,

Japan JIS G 4103 SNCM4

JIS G 4105 SCM4

JIS G 4105 SCM440



Chemical composition (%):

Carbon 0.38-0.45

Silicon 0.17-0.37

Manganese 0.50-0.80

Phosphorus 0.04 max

Sulphur 0.04 max

Chromium 0.90-1.20

Molybdenum 0.15-0.25



Process:EAF+LF+VD+forged+heat treatment(optional)



Size range:

Round:

Hot Forged: 80mm-1200mm




Surface finishes:

Black, peeled(k12), cold drawn, turned & polished(h10, H11), precision ground(H9, H8)


Colour code:Blue end


Test:Ultrasonic test according to SEP 1921-84