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Hi - Speed, high Speed Steel Tool Steel (made) : highly processed into the Tool Steel, carbon content high, while containing cr quantity is low (about 4%), reason burnish of Steel surface gloss darker, after heat can reach by HRc62 high hardness, resistance to rust performance not on a roll.

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Alloy steel is steel alloyed with a variety of elements in total amounts of between 1.0% and 50% by weight to improve its mechanical properties. Alloy steels are broken down into two groups: low alloy steels and high alloy steels. The difference between the two is somewhat arbitrary: Smith and Hashemi define the difference at 4.0%, while Degarmo, et al., define it at 8.0 %.[1][2] Most commonly, the phrase "alloy steel" refers to "low alloy" steels.

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Home » Tool Steel » Product introduction

AISI S7 Tool Steel

  • Numbers: 2011070415
  • Model: AISI S7
  • Producers: China
  • Update time: 2011.07.04
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Product Description:

Tool Steel

AISI S7 Tool Steel

Designations 
United States: ASTM A681 , UNS T41907

 Chemical Composition

Element
Weight %
C
 0.45-0.55 
Mn
 0.20-0.90 
Si
 0.20-1.00 
Cr
 3.00-3.50 
Mo
 1.30-1.80 
V
 0.35 max 
Cu+Ni
 0.75 
P
 0.03 max
S
 0.03 max

 

Mechanical Properties

Properties
 Conditions 
T (°C)
Treatment
Density (×1000 kg/m3)
7.76
25
 
Poisson's Ratio
0.27-0.30
25
 
Elastic Modulus (GPa)
190-210
25
 
Tensile Strength (Mpa)
640 
25 
annealed
Yield Strength (Mpa)
380 
Elongation (%)
25 
Reduction in Area (%)
55 
Hardness (HRB)
95 
25 
annealed
Impact Strength (J)
(Charpy unnotched)
244 
25 
fan cooled from 940°C, single tempered at 205°C

 

Thermal Properties

Properties
 Conditions 
T (°C)
Treatment
Thermal Expansion (10-6/ºC)
12.6 
20-200
 

 

S-7 is an air or oil hardening shock resisting (cold work) Tool Steel offering a unique combination of toughness and weai resistance.This material primarily used in application that require resistance to shock and/or impact.
S-7 can be used for both cold and hot tooling applications where a high degree of shock resistance is required but can also be used for dies in plastic molding and other applications where the operating temperatures are below 1000 degrees.
S-7 has a machinability rating of about 75% of a 1% carbon Tool Steel.
S-7 is sold in the annealed condition.Typical annealed hardness is BHN 187/220 Rc 10/18.
S-7 maximum working hardness is BHN 615 Rc 58.
S-7 is capable of meeting ASTM-A681.
Typical Application:
Shear blades, swaging dies,chisels, gripper dies, plastic injection molds,punches,
 
 
Product description:
Step Shaft AISI S7  Tube AISI S7  Pie-shaped AISI S7  Ring AISI S7   Module Large valves of the main AISI S7   Other Profiled forgings AISI S7
Special Steel classification:
Stainless steel, Hi-Steel HSLA-80, Mould steel,  Heat resistant steel, Tool Steel, Ball bearing steel,Spring steelAlloy steel,  Construction steel,  Die steel, High-speed steel,  angles, channels, H steel, I-beams, welded pipes, seamless tubes,
Standard:
Our products meet Chinese GB, Japanese JIS, US ASTM, UK BS, EU DIN standards and so on.
Our advantages:
Our advantages such as advanced management and operation concepts, suitable work facilities, highly qualified talents and a number of trade partners who have long-term and close cooperation with us have ensured us to provide global customers with competitive high-quality commodities and excellent services, quickly, accurately, conveniently and completely.

Products Introduction:
Specifications
Round bar:
Diameter : 1mm-2000mm
Square bar:
Size:  50mm * 50mm-600mm *600mm
Plate steel/flat bar:
Size: Thickness:  0.1mm-800mm Width: 10mm to 1500mm
Tube/pipe:
Size: OD:  6-219mm  WT: 1-35 mm.
Cold-rolled sheet: Thickness:  2-5mm Width:1000mm Length: 2000mm
Hot-rolled sheet: Thickness:6-80mm Width: 210-610mm
Length:  We can supply any length based on the customer's requirement.
Forging/hot rolling/ extrusion of steel.
Forging: Shafts with flanks/pipes/tubes/slugs/donuts/cubes/other shapes
Finished goods condition:  hot forging/hot rolling + annealing/normalizing + tempering/quenching + tempering/any conditions based on the customer's requirement

Surface conditions:  scaled (hot working finish)/ground/rough machining/fine machining/based on the customer's requirement
Furnaces for metallurgical processing:  electrode arc + LF/VD/VOD/ESR/Vacuum consumable electrode.
Ultrasonic inspection:  100% ultrasonic inspection for any inperfections or based on the customer's requirement
Excellent service for all kinds of industries, with advantages of technologies,  equipment and price.
We serve you with our honesty,  integrity,  and professionality.

 

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Copyright 2003 - 2011 China longhai special steel Co., LTD is mainly engaged in all kinds of stainless steel 630 production, wholesale, retail enterprises

TEL:+86-13880247006 | FAX:+86-816-3639422 | E-mail:sales@specialsteel-jy.com | Add:119#,Jiangdong road, Sanhe Town,Jiangyou City, Sichuan Province, China | Zip:621701