Diamond Metals Corporation

DIAMONDWEAR

Chemical Analysis:		Tempering Temp. º(F)	Hardness Rc
Carbon	1.10/1.20	As-quenched	63.5
Manganese	.30/.50	300	62.5
Phosphorus	.030 Max.	400	61.0
Sulfur	.030 Max.	500	59.0
Silicon	.80/1.00.	600	58.0
Chromium	8.00/9.00	700	59.0
Vanadium	1.90/2.00	800	59.0
Tungsten	1.40/1.60	900	61.0
Molybdenum	1.40/1.60	1000	64.0
Cobalt	-------	1100	55.0
		1200	43.0

DiamondWear is an excellent semi-high speed steel which is used extensively for solid machine knife application and cold working applications in place of conventional high speed grades.

DiamondWear has extra toughness and wear resistance, compared to AISI M-2, at a reduced cost.

Uses:
HD punches, HD dies, trim dies, blanking dies, compacting dies, stamping dies, planer knives, plastic granulator knives, slitter knives, thread roll dies, shear blades.

Forging/Rolling:
Preheat to 1550° F - 1600° F and soak thoroughly. Then raise to 1900° F - 2100° F. Do not forge or roll below 1850° F, cool slowly from the forging or rolling temperature. Do not normalize.

Annealing:
Heat slowly to 1550° F - 1600° F, and hold for uniformity, furnace cool at a rate of 20° F per hour to 1000° F, then air cool. Expected Brinell hardness range 201/241.

Hardening:
Preheat to 1500° F - 1550° F, soak until uniformly heated, and either transfer or raise furnace temperature to 1850° F - 1950° F, and hold for no more than 20 minutes regardless of cross section. Then cool in still sir.

Tempering:
Temper immediately after quenching, before part has cooled to below 150° F. Parts should be held a minimum of 2 hours per inch of thickness. Triple tempering is recommended. A deep cryogenic treatment may be substituted for the middle of the second temper. The above tempering table may be used as a guide. However, since 1/2" dia. specimens were used for this test, it may be found that heavier sections are several points lower.