CARRS BCC

BS EN ISO 4957 - 60WCrV8, DIN - 1.2550

TYPICAL ANALYSIS

C	0.60	Si	0.65
Cr	1.10	W	2.00
V	0.15

CHARACTERISTICS
This steel is produced for purposes where toughness combined with a good compression strength is required. It has excellent resistance to fatigue. This steel is suitable for low temperature hot working operations, as well as many cold working operations involving shock.
Colour Code: PALE GREEN.

TYPICAL APPLICATIONS

•	Heavy duty blanking punches and dies	•	Snaps
•	Coining dies	•	Drifts
•	Cold stamping dies	•	Swaging tools
•	Cropping tools	•	Hot brass pressing and stamping dies, etc.
•	Shear blades	•	Gripper dies
•	Chisels	•	Hot shearing
•	General boilermaker's tools	•	Hot cropping
•	Caulking tools	•	Hot swaging.

HEAT TREATMENT graph

NB This steel is very susceptible to decarburisation and precautions should be taken during heating to avoid its occurrence.

FORGING
Commence at 1050°C. Re-heat as necessary to avoid working below 850°C

ANNEALING
Soak thoroughly at 710/750°^oC. Cool in furnace not faster than 20°C per hour

STRESS RELIEVING
Heat uniformly to 650°C max. Allow to equalise and remove from furnace. Cool in still air to room temperature

HARDENING & TEMPERING
Thoroughly warm Tools or Components before charging

HEATING & SOAKING
(a) Salt Bath Procedure
Charge Tools into Pre-heater chamber at 300/400°C and soak thoroughly up to 1 hour per inch of ruling section. Remove to Neutral Salt Bath operating at 870/900°C and maintain at this temperature for 15 minutes or 10 minutes per inch of ruling section ( whichever is the greater).

(b) Open Furnace Procedure
Charge Tools into muffle furnace working at 300/400°C and soak thoroughly, preferably 1 hour per inch of ruling section. Raise heat uniformly to 870/900°C and maintain at this temperature for 10/20 minutes according to size.

QUENCHING
Quench in oil at 160/180°C. Alternatively, where changes in section might lead to a risk of cracking or distortion, and where a slightly lower hardness can be tolerated, quench in salt at 160/180°C.
Tools should be tempered immediately whilst still hand warm.

TEMPERING
Temper to your requirements according to the tempering graph - soaking at temperature for 1 hour per inch ruling section or 2 hours whichever is longer. A second temper is recommended.