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1.6580 alloy steel

1.6580 steel is alloy structural steel with medium hardenability designed for heavy duty components, characterized by high elasticity. When softened, the hardness could reaches 248 HRB. It is also characterized by its resistance to variable loads and impacts. 1.6580 material is not suitable for welding and ultimately requires additional preheating.

1.6580 Steel equivalent standards:

1.6580 steel mechanical properties:

Tensile strength, Rm >800 N/mm2

Yield strength, Re: >590 N/mm2

Elongation, A: >12%

Impact strength, KV: >40 J

1.6510 Alloy Steel

1.6510 Steel is  a steel  with high hardening capacity and good toughness, which allows to achieve optimum mechanical properties with dimensions up to approx. 80mm.

1.6510 Steel equivalent standards:

1.6510 Steel equivalent standards:

Yield point:< 740 MPa

Tensile strength:> 880 MPa

Elongation:> 12 %

Density:~7,85 kg/dm³

1.5752 Alloy steel

1.5752 belongs to alloy steel, otai manufacture 1.5217 alloy steel. 1.5217 supplier.

1.5752 steel mechanical properties:

Tensile strength: 650 – 880MPa

Yield strength:350 – 550MPa

Elongation:8 – 25%

Fatigue:275 – 275MPa

1.5752 Steel equivalent standards:

1.5217 alloy steel

1.5217 belongs to alloy steel, otai manufacture 1.5217 alloy steel. 1.5217 supplier.

1.5217 Steel equivalent standards:

1.5217 steel mechanical properties:

Yield strength [MPa]:410-450

Tensile strength[MPa]:550-750

Elongation A [%]:20

Reductionof area Z [%]:40

Hardness:< 220 HB

1.5217 alloy steel application

Tubular parts for the automotive, oil and gas, construction, general engineering and agricultural industry, such as bushes, hydraulic cylinders, hollow shafts, rings, hollow rolls for conveyors, nuts, gear wheels, shafts, axles, stuffing boxes, spindles, drill jigs, rolls etc.

3 steel grades suitable for making gear

Gear steel is the general name of steel used in gear manufacturing. Gear is one of the most widely used mechanical components, and is widely used in mechanical transmission. There are many types of gears, such as spur gear, chain gear, synchronous pulley, helical gear, internal gear, rack, straight bevel gear, arc bevel gear, zero bevel gear, staggered spiral gear, worm gear, etc.

Gear steel is a key material with high requirements for special alloy steel used in automobile, railway, ship and engineering machinery. Gear material needs strong bending fatigue strength and contact fatigue strength, and the tooth surface should have enough hardness and wear resistance, and the tooth core should have certain strength and toughness. Gears are usually made of forged steel, except for foundry plants with too large size (Dia > 400-600mm) or suitable for complex structures and shapes.
Carbon steel or alloy steel with carbon content of 0.15-0.6% is usually used in gear applications. The Microalloy Elements in gear steel can improve the toughness, impact resistance, wear resistance and adhesion of the material, and the mechanical properties of the material can also be improved by heat treatment or chemical heat treatment. Alloy gear steel usually does not include low carbon alloy steel, such as 15CrMo, 20Cr, etc. and medium carbon alloy steel: 40Cr, 42CrMo, 35CrMo, etc.

15CrMo
Carburizing surface quenching treatment is generally used to pay attention to the strength or toughness of parts or parts that need to bear a lot of friction, such as cylinder piston, spindle, gear, bolt, shaft, etc. It is used to make profile less than 30mm under high speed, medium load or heavy load, impact and friction of important parts; for example, crosshead of gear, ring gear and gear shaft.
In the automotive industry, the cross-section used is less than 30mm; important carburizing parts bear high speed or heavy load and impact; for example, gears, shaft gear rings, gear shafts, sliding bearing spindles, crossheads, claw clutches, worm, etc

25CrMo4
The alloy structural steel 25crmo4 (ASTM 4118) has high hardenability, no temper brittleness, good weldability, little cold crack tendency, good machinability and cold strain plasticity.
25CrMo4 gear steel is used in general conditions or under carburizing quenching conditions, which is used for manufacturing corrosive medium with working temperature lower than 250 ℃, high pressure pipe and various fasteners working with medium containing hydrogen nitrogen mixture, higher carburizing parts and automobile gears, various special wear-resistant parts, such as aircraft, shaft, high pressure pipe and various fasteners.

42CrMo4
42CrMo4 (ASTM 4140) is a medium carbon chromium molybdenum alloy steel. Chromium content provides good hardness permeability, molybdenum element provides hardness uniformity and high strength. The alloy well balances strength, toughness and wear resistance. It has the following advantages: stable composition, less harmful elements, high purity of steel, small decarbonization layer, less surface defects, etc., and easy to process under heat treatment conditions, with good ductility and high temperature stress resistance. This material is widely used in the production of high-strength steel fasteners, such as engine, mould, motor, gear, transmission parts, shaft, gear, arm, cold forging, screw products.

In addition, ASTM 4320, 4340, 8615, 8617, 8620, 8622, 9840 (https://otaialloysteel.com/products/alloy-steel/)and so on can also be used for gear purposes. As common alloy carburizing and bearing steel, they are mainly used as materials for automobile bearings, transmission shafts, gears, screws, tool parts and other impact resistant and wear-resistant parts. The surface after carburization has high hardness, wear resistance and contact fatigue strength, while the core still maintains good toughness and can bear high impact load.

51CrMoV4 Structural steel

51CrMoV4 steel Otai stock huge stockist, belongs to Structural Cr-Mo-V-steel. 51CrMoV4 Steel plate.

Otai accepts all kinds of large, medium and small orders, and can help customers with cutting, machining, and heat treatment to solve customers’ problems in one stop.

Otai’s advantage:
1. There are thousands of tons of steel inventory in our warehouse, especially for 4140/42CrMo plate, Otai is the largest stockist in South China.
2. Small order can be received. Compared with large steel mills, MOQ is lower, which is more conducive to foreign small and medium stockers.
3. We can finish all kinds of machining process like milling, polishing, turning and other processing.
4. With independent testing equipment, including spectrometers, UT flaw detection equipment, etc., compared to traders, we can fully guarantee product quality for customers.

3 major traps in steel procurement:
Using low-value materials as high-value materials; Otai will never be provide shoddy goods.

Offering low prices to attract customers regardless of customer performance requirements; Otai will only quote the most accurate price based on customer needs.

Delivery is not possible within the delivery period, making customers unable to keep up with the project; Otai promises to deliver within the fastest delivery time.

Material 51CrMoV4 Equivalent:

51CrMoV4 Properties(Mechanical properties):

Tensile Strength (Mpa):1158

Yield Strength (Mpa):1034

Elongation (%):15

Reduction in Area (%):53

Hardness (HB): 335

32crmov12-10 Cold work steel

DIN 32CrMoV12-10 Steel is a high-quality Cold work tool steel, It belongs to the high-quality high carbon alloy tool steel. Oil Quenched & Tempered Hardness is 300 HB. 32CrMoV12-10 steel Annealing delivery hardness less than 250HB.

32crmov12-10 Mechanical Properties:

Tensile strength(MPa):≥912

Impact energy KV (J):43

Elongation A (%):31

Reduction Z (%):21

Brinell hardness (HBW):324

32crmov12-10 equivalent steel grades:

42CrMo4 steel properties

1.Description of 42CrMo4 steel

42CrMo4 steel is a kind of common alloy steel, which is usually used after quenching and tempering. It has high strength and high hardenability. The properties of 42CrMo4 round steel are better than that of 34CrMo4 steel because of higher content of carbon and chromium. 42CrMo4 alloy also has high fatigue strength and good low temperature impact toughness. The temper brittleness is not obvious.
42CrMo4 steel is a kind of high-quality quenched and tempered alloy structural steel, which belongs to high-quality low-carbon, low-alloy Cr, Mo, Ni surface hardening steel. The hardness of oil quenching and tempering is 18-22 HRC. Annealing hardening is less than 250hb. 42CrMo4 has a low carbon content range, so it has good weldability.

2.Heat treatment of 42CrMo4  steel
Annealing of 42CrMo4 alloy structural steel
Heat slowly to 872 ℃ for enough time to allow the steel to heat thoroughly and then cool slowly in the furnace. The maximum hardness of 42CrMo4 alloy steel is 250 HB (Brinell hardness).
Hardening of alloy structural steel 42CrMo4
First, the quenching is slowly heated to 880 ° C, then fully soaked at this temperature and quenched in oil or water. The tool is tempered immediately after reaching room temperature. Second quenching to 780-820 ° C followed by quenching in oil or water.
Tempering of 42CrMo4 alloy structural steel
Heat to 205-649 ° C and then cool in water or oil. The normal delivery hardness is 18-22 HRC.
Forging of 42CrMo4 alloy steel
42CrMo4 alloy steel forged at 926 to 1205 ° C (1700 to 2200 ° f)

3. Application of 42CrMo4 steel
42CrMo4 steel is characterized by high strength, high hardenability, toughness and small deformation after quenching, high strength and creep fracture strength at high temperature. The requirement of manufacturing higher strength than 35CrMo steel and the cross section of tempering forging are larger, such as large locomotive traction gear, supercharger drive gear, pressure vessel, gear, rear axle, which are greatly affected by load and spring clip link. It can be used for 2000m deep oil drill pipe joint, fishing tool, bending machine mould, etc.

4. Processing of 42CrMo4 steel
42CrMo4 plate and alloy steel round bar can be cut according to your requirements. Can also provide 42CrMo4 alloy steel grounding rod, according to your requirements tolerance to provide high quality tool steel precision grounding tool steel bar. 42CrMo4 steel can also be used as grinding plate / gauge plate of standard and non-standard sizes.

1.2542 tool steel

1.2542 belongs to cold work alloy tool steel.

1.2542 steel – Equivalent Materials:

1.2542 steel Mechanical Properties:

Yield Rp0.2 (MPa):＞136

Tensile Rm (MPa):＞374

Impact KV/Ku (J):34

Elongation A (%):42

Reduction Z (%):22

Brinell hardness (HBW):434

56Si7 spring steel

56Si7 belongs to spring steel.

56Si7 Steel equivalent standards:

56Si7 steel Mechanical Properties:

Tensile strength (MPa) (+A):740

proof strength (MPa):600

Elongation(+A):12

Brinell hardness (HB): (+A):248

56Si7 steel Applications

56Si7 steel  is  applied to  different types of springs as leaf springs, helical springs, belleville washers.

86CrMoV7 cold work steel

86CrMoV7 steel belongs to cold work alloy tool steel. 86CrMoV7 features for its high strength and hardness, good weldability, toughness, machinability and so on.

86CrMoV7 material equivalent steel grades:

86CrMoV7 mechanical properties:

Yield Strength  (MPa):≥446

Tensile Strength (MPa):≥329

Impact KV/Ku (J):32

Elongation A (%): 41

Reduction Z (%):24

90SiCr5 cutting tool steel

90SiCr5 is a low alloy measuring and cutting tool steel with high hardenability, hardenability and tempering stability. The steel is suitable for step quenching or isothermal quenching, and the deformation of heat treatment is small.