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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 » Alloy and Carbon Steel » Product introduction

AISI 8740 Alloy Steel

  • Numbers: 2011051704
  • Model: 8740
  • Producers: China
  • Update time: 2011.05.17
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Product Description:

Alloy steel

AISI 8740 Alloy Steel

Designations
Germany: DIN 1.6546
Italy: UNI 40 NiCrMo 2 KB
United Kingdom: B.S. Type 7
United States: AMS 6322 , AMS 6322F , AMS 6323 , AMS 6323D , AMS 6325 , AMS 6325D , AMS 6327 , AMS 6327D , AMS 6358 , AMS 6358B , ASTM A322 , ASTM A331 , ASTM A505 , ASTM A519 , MIL SPEC MIL-S-6049 , SAE J404 , SAE J412 , SAE J770 , UNS G87400

 

Chemical Composition

Element
Weight %
C
 0.38-0.43 
Mn
 0.75-1.00 
P
 0.035 (max) 
S
 0.04 (max) 
Si
 0.15-0.30 
Cr
 0.40-0.60 
Ni
 0.40-0.70 
Mo
 0.20-0.30

Mechanical Properties

Properties
 Conditions 
T (°C)
Treatment
Density (×1000 kg/m3)
7.7-8.03
25
 
Poisson's Ratio
0.27-0.30
25
 
Elastic Modulus (GPa)
190-210
25
 
Tensile Strength (Mpa)
695.0 
25 
annealed at 815°C
Yield Strength (Mpa)
415.8 
Elongation (%)
22.2 
Reduction in Area (%)
46.4 
Hardness (HB)
201 
25 
annealed at 815°C
Impact Strength (J)
(Izod)
40 
25 
annealed at 815°C

 

 

Product description:

Step Shaft AISI 8740  Tube AISI 8740  Pie-shaped AISI 8740   Ring AISI 8740   Module Large valves of the main AISI 8740   Other Profiled forgings AISI 8740

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.

Stainless Steel Suppliers | Hi-Steel HSLA-80 | Steel mould | Heat resistant steel | Tool Steel | Ball bearing steel | Spring steel | Alloy

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