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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 - 1.10 | 0.75 - 1.00 | 0.15 - 0.25 | 0.04 Max. | 0.04 Max. | 0.14 - 0.35 |
Size Availability:
Flats • Hollowbar • Metric • Non-Standard • Rounds • Squares • StandardApplications:
| Bending Dies | Brake Die Tooling | Die Holders |
| Short Run Stamping | Support Tooling |
Designations:
AFNOR 42 CD 4 - FranceDIN 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
AMS 6379 - US
AMS 6381B - US
AMS 6390 - US
AMS 6390A - US
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
AMS 6378 - US
AMS 6382 - US
AMS 6382G - US
AMS 6390A - US
AMS 6395 - US
ASTM A646 - US
SAE J412 - US
SAE J770 - US
| Treatment | Temperature Range | Cooling/Quenching | Notes |
|---|---|---|---|
| Annealing | 1100-1300° F | Air cool, | Hold 2 hrs, air cool. |
| Preheating | 1250-1300° F | Equalize | |
| Hardening | Atmosphere 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. |