Active Member
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[China]
Address: Room 1109, Loft Office, Green Land International Plaza, No. 275-8 Guoding East Road, Shanghai 200433, P.R. China. (admin(a)shunitesteel.com)
Contact name:Eric
SHANGHAI UNITE STEEL |
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APPLICATIONS:
S7 Steel, Alloy S7 Steel, AISI S7 Steel is used widely for
medium-run cold-work tools and dies, for plastic-molding dies, for
shear blades, for medium hot-work dies, for master hobs, and for
component parts of many products.
It is recommended for both hot and cold shock applications such as
rivet sets, chisels, punches, moil points, hot headers and gripper
dies. S7 is also suited for short-run dies used in coldforming,
blanking, and bending. Other uses include: engraving dies, machined
cavities for plasticmolding dies, die-casting dies, shear blades,
and master hobs.
SIZE RANGE:
Round:
Hot Rolled: 8mm-500mm
Hot Forged: 80mm-800mm
Flat:
Hot rolled: Thickness: 20-130mm Width: less than 610mm
Hot forged: Thickness: 150-600mm Width: up to 1600mm
| Chemical Composition(%) | ||||||||
| C | Si | Mn | P | S | Cr | Mo | V | W |
| 0.45-0.55 | 0.20-1.00 | 0.20-0.90 | 0.030 max | 0.030 max | 3.00-3.50 | 1.30-1.80 | 0.35 max | ---- |
| Surface condition: | ||||||||
| Black surface / Peeled / Turned / Milled | ||||||||
| Heat Treatment | ||||||||
| Anneal in a protective atmosphere. Heat rapidly to 1500 to 1550°F and hold at that temperature for one and one-half hours for each inch of greatest thickness. To obtain best machining properties, cool slowly to 1000°F, and then air-cool. This annealing procedure should produce a hardness of Brinell 197 max | ||||||||
| Melting Process | ||||||||
| 1. EAF: Electric Furnace+LF+VD(Optional) | ||||||||
| 2. ESR: Electric Furnace+LF+VD+Eleroslag Remelted(Optional) | ||||||||
| UT Class | ||||||||
| According to Standard of SEP 1921/84,100% Volume, Level C/c, D/d or E/e | ||||||||
SURFACE FINISHES:
Black, Peeled K12, Cold Drawn, Turned & Polished H10, H11,
Precision Ground H9, H8
Certificate of Quality: issued in English, in addition the normal terms, production process, the mechanical property yield strength, tensile strength, elongation and hardness, forged ratio, UT test result, Grain size, heat treatment methods and the sample of is shown on the Certificate of Quality.
Marking: Heat No. will be cold stamped and Steel grade, diameter mm, length mm, and the manufacturer LOGO and weight kg is painted.
