North America,South America,Eastern Europe,Southeast Asia,Africa,Oceania,Mid East,Eastern Asia,Western Europe
S7 For Heavy Impact Punches:
S7 for Warm Forging/Heading Dies
S7 For Plastic Injection Molds:
S7 for Plastic Injection Molds
Product Material:
Steel
Shaping Mode:
Punching Mold
Product:
Mould Steel
Product Description
S7 is a shock-resistant air hardening tool steel, designed for high impact resistance at relatively high hardness. It offers toughness to withstand chipping and breaking, combined with high attainable hardness and good wear resistance.
Chemical Composition
Carbon: 0.55%
Manganese:0.70%
Chromium: 3.25%
Molybdenum:1.40%
Vanadium: 0.25%
Silicon: 0.35%
Typical Applications
Heavy Impact Punches
Warm Forging/Heading Dies
Plastic Injection Molds
Shear Blades
Powder Compaction Punches
Austenize: 1725/1775F (995/895C), 30/45 minutes at temperature.
Quench: Air, positive pressure vacuum to 150F (65C), Interrupted oil to 150F(65C). Sections over 3" thick may require oil quenching to attain full hardness.
Temper: 350/1000F (205/540C), hold 2 hours at temperature, air cool. Temper twice.
Cryogenic Treating: Refrigeration treatments may improve long term dimensional stability by transforming retained austenite. Refrigeration treatments should generally be performed after the first temper, and must be followed by a temper.
Hardness and Impact Toughness Data
Air cooled from 1775F(970C)
Surface Treatments
Because of the low tempering temperatures normally used, S7 is not typically suitable for nitriding or similar treatments.
Annealing
A. Heat to 1550F (840C), hold 2 hours, slow cool 50F (30C)/hour maximum) to 1000F (540C), air cool.
OR
B. Heat to 1550F (840C), hold 2 hours, cool to 1400F (760C), hold 4 hours, air cool to room temperature.
Typical annealed hardness: 187/220 BHN.
Stress Relieving
Annealed Material: Heat to 1200/1250F(650/675C), hold two hours, cool in still air.
Hardened Material: Heat to 25F(15C) below original tempering temperature, hold two hours, cool in still air.
Welding
Use hot work tool steel filler material 4140 or 4150 type filler material may be satisfactory for small repairs or welds away from working surface of tool.
Annealed Material: Preheat to 400/600F(205/315C). Maintain above 400F(205C) during welding. Reanneal or temper 1400F(760C) for 4 hours after welding.
Hardened Material: Preheat to original tempering temperature (300F(150C) minimum). Maintain above 300F(150C) during welding. Cool to 150F(65C) after welding. Temper 25F(15C) below original tempering temperature. (300F(150C) Minimum)
Physical Properties
Modulus of Elasticity.
Tempering
Toughness
Temperature
Hardness
Charpy C-Notch
Deg. F
Deg. C
HRC
Ft. Lbs.
Joules
As quenched
59
-
-
300
150
59
85
115
400
205
57
125
169
500
260
55
125
169
600
315
54
115
155
700
379
53
105
141
800
425
53
105
141
900
480
52
120
162
1000
540
51
150
203
1100
595
47
190
257
30psix10(6)
(207 GPa)
Density
0.283 lb/in3
(7861 kg/M3)
Thermal Conductivity
16.5 BTU/hr. /ft. /F
29 W/m/ ° K)
Huangshi Huayu Mechanical and Electrical Corporation is a professional special steel manufacturer. Our company was founded in 2004, headquarters in the famous steel base-Huanshi city, Hubei province, China.
The company possessed 18000 square meters mill, the fixed assets is more than RMB 90 million, and the annual sales of exporting is more than USD 25 million. We are the largest production of export-oriented enterprise in Huangshi city.
Our company has nearly one hundred of senior technicians, senior artificers and foreign trade personnel. We always put the quality management in the first place, control the production operation strictly, and emphasize the after-sale service. Our manufacture factory has possessed more than 180 sets of equipment, such as large-scale forging, milling, vacuum heat treatment and processing machine for special steel.
Our main business scope: High quality stainless steel, special steel, hot work tool steel, cold work tool steel, plastic mould steel and high speed tool steel, such as SKT4, D3, O1, SKD11, H11, H13, H21, P20, 738, NAK80, SKS3, 1.2083, 1.2344, 1.2346, M2, and so on. Our company has GB/T 19001-2008idt ISO 9001: 2008 certification with an annual output in 100000 tons. Nowadays, we export to Germany, Turkey, Korea, Japan, India, Thailand, Malaysia, Hongkong, Taiwan and other counties and regions. During the long-term development, we established the friendly partner relationship with many companies.
Our principle, "Honesty is the best policy". Our business is based on the honesty and trusworthiness, provided with high quality products, competitive price, and sincere commitment as well as the best service for every customer. Our company welcomes friends of all works of life to cooperate with us for joint developments, and your precious advice is valued and important at any time.
Huangshi Huayu Mechanical and Electrical Corporation is a professional special steel manufacturer. Our company was founded in 2004, headquarters in the famous steel base-Huanshi city, Hubei province, China.
The company possessed 18000 square meters mill, the fixed assets is more than RMB 90 million, and the annual sales of exporting is more than USD 25 million. We are the largest production of export-oriented enterprise in Huangshi city.
Our company has nearly one hundred of senior technicians, senior artificers and foreign trade personnel. We always put the quality management in the first place, control the production operation strictly, and emphasize the after-sale service. Our manufacture factory has possessed more than 180 sets of equipment, such as large-scale forging, milling, vacuum heat treatment and processing machine for special steel.
Our main business scope: High quality stainless steel, special steel, hot work tool steel, cold work tool steel, plastic mould steel and high speed tool steel, such as SKT4, D3, O1, SKD11, H11, H13, H21, P20, 738, NAK80, SKS3, 1.2083, 1.2344, 1.2346, M2, and so on. Our company has GB/T 19001-2008idt ISO 9001: 2008 certification with an annual output in 100000 tons. Nowadays, we export to Germany, Turkey, Korea, Japan, India, Thailand, Malaysia, Hongkong, Taiwan and other counties and regions. During the long-term development, we established the friendly partner relationship with many companies.
Our principle, "Honesty is the best policy". Our business is based on the honesty and trusworthiness, provided with high quality products, competitive price, and sincere commitment as well as the best service for every customer. Our company welcomes friends of all works of life to cooperate with us for joint developments, and your precious advice is valued and important at any time.
