4140 Pre-Hard 28/32 RcH
Holder Block
DSS #40

As implied by its name, 4140 Pre-Hard has the mechanical strength to create a strong yet economical holder block.

Grade Name:	4140 Pre-Hard (DSS #40)
Chemistry:	C Mn Cr Mo 0.40% .90% 1.00% 0.20%
Applications:	Holder Block Filler Block Back-Up Plates Stripper Plates Fixture Material
Heat Treatment:	4140 Pre-Hard is supplied in the heat treated condition 28/32 RcH. Annealing Temp: 1450º F/1550º F furnace cool Austenitizing Temp: 1600º F/1650º F Quench Medium: Oil Tempering Temperature: 400º F/1100º F depending on required hardness. Flame or Induction Hardening: Can be performed to 50 RcH/temperature at 300º F
Welding Specs:	Welding Rod: A.I.S.I. 4140 Type Pre-Heat temperature: 750º F (if possible) Post-Heat temperature: Maximum of 50º F under last tempering temperature or 950º F/1000º F.
Surface Coating:	4140 Pre-Hard is capable of receiving many of today's surface coatings.  Check with your DSS sales representative or with any of the quality coatings companies.

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Dunn Specialty Steels, Inc.
23333 Sherwood - Warren, MI 48091
Phone: (586) 757-4775 - FAX: (586) 757-4354
Call us toll-free at (800) 880-2078
Email: info@dunnsteel.com

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