4140 Annealed Alloy Steel


4140 Annealed is fine quality alloy steel used for brake die tooling, support tooling, die holders, short run stamping and bending dies.

Analysis:

C CO CR MN MO NI P S SI V W
0.38 - 0.43 0.80 - 1.100.75 - 1.000.15 - 0.25 0.04 Max.0.04 Max.0.14 - 0.35

Size Availability:

Flats • Hollowbar • Metric • Non-Standard • Rounds • Squares • Standard

Applications:

Bending DiesBrake Die ToolingDie Holders
Short Run StampingSupport Tooling

Designations:

AFNOR 42 CD 4-France
DIN 1.7225-Germany
JIS SCM 4-Japan
JIS SCM 4 H-Japan
B.S. 708 M 40-United Kingdom
B.S. 709 M 40-United Kingdom
ASTM A322-US
ASTM A331-US
ASTM A505-US
ASTM A519-US
ASTM A547-US
MIL SPEC MIL-S-16974-US
SAE J404-US
UNS G41400-US
AISI 4140 Alloy Steel-US
AFNOR 40 CD 4-France
UNI 38 CrMo 4 KB-Italy
UNI 40 CrMo 4-Italy
UNI G 40 40 CrMo 4-Italy
SS 2244-Sweden
B.S. 708 A 42-United Kingdom
ASTM A646-US
SAE J412-US
SAE J770-US

TreatmentTemperature RangeCooling/QuenchingNotes
Annealing1100-1300° FAir cool,Hold 2 hrs, air cool.
Preheating1250-1300° FEqualize
HardeningAtmosphere or Vacuum Furnace.
Tempering(See Chart)Tempering at 400-1200F (205-650C) for 1 hour per inch (25mm) of thickness at temperature is recommended (2 hrs min). Air cool to room temperature.
Data is typical and should not be construed as actual values for any category.
Applications and technical information require engineers and tool designers to exercise independent judgement.