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Economical JIS G4105 SCM440 SCM420 Steel Pipes

SCM440 is a Chrome alloy structure steel. It contains 0.9-1.2% Cr, usual use in gears, pump shafts and tool holders. The standard Hardness is 18-22HRc. For more info and price of SCM440 STEEL PIPES SCM420 STEEL PIPES, please send us inquiry and you will have quick reply soon.

Description

Economical JIS G4105 SCM440 SCM420 Steel Pipes 


We are leading manufacturer and stockiest of SCM440 SCM420 STEEL PIPES in China.


SCM440 is a Chrome alloy structure steel. It contains 0.9-1.2% Cr, usual use in gears, pump shafts and tool holders. The standard Hardness is 18-22HRc.


Chemical composition of SCM440 SCM420 STEEL PIPES


JIS

C

Si

Mn

Cr

Mo

P

S

SCM440

0.38~0.43

0.15~0.35

0.60~0.85

0.90~1.20

0.15~0.30

≤0.030

≤0.030

Application:

JIS SCM440 is commonly used in oil and gas sector. Typical applications as Connecting rod, Pin seam jacketed conveyor, gears, stem assembly, pump shaft and the tool holder.


Forging:

At 1200°C start forging, keep the forging temperature no below 850°C


Annealing:

Heat to 850°C slowly, ensure heat thoroughly.  Then cool in the furnace.


Quenching:

SCM440 steel usually supply at 18-22HRc, if need Hardening. Heat SCM440 to 840-870°C, then quench in oil until to room temperature.


Tempering:

Heat SCM440 steel to suitable Tempering temperature, Tempering temperature between 250-375°C.


Heat treatment:

According different use requirement, SCM440 heat treatment is different.  We advice you contact your heat treatment supplier get more details data.


Physical properties:

●Density of SCM440: 7.85 kg/cm3

●Thermal expansion co-efficient: 12.2 µm/m°C at 0-100°C

●Thermal conductivity: 42.6 W/mK @100°C.


Mechanical properties:

●Tensile: 100-130 KSI

●0.2% Proof stress: 80-110 KSI

●Elongation: 20%

●Reduction of Area: 40% Min

●hardness: 18-22HRc / 217-235 HBS

*All test at room temperature 25°C and heat treatment SCM440 steel to 18-22HRc.


Quality Assured and Certification:

All SCM440 Steel quality by our ISO 9001:2008 quality management system. Material MTC Certification fllow to order delivery to Customers.


Equivalent Grades: 

GB 42CrMoA, JIS SCM440, ASTM 4140, 4142, DIN 42CrMo4, 42CrMoS4. SCM440 are commonly used for the fasten parts with high strength, such as engine, die, motor, gear, transmission parts, shaft, gear, arm, cold forging parts, screw, and so on. SCM440 have the advantages of the stable composition, less harmful elements, high purity, less decarburization layer, less surface defects, easy spheroidized annealing, low cold heading cracking rate, steady heat treating quality, and uniform hardness.

SCM440 SCM420 STEEL PIPES materials are alloy steel with high harden ability, temper brittleness, well weld ability, less cold cracking tendency, good machinability, and great cold plastic strain. SCM420 generally are used for the parts which need high wear resistance, such as gears, shafts, high-pressure pipes, all kinds of fasteners, and so on.


Type of SCM440 SCM420 STEEL PIPES

SCM440 , 42CrMoA , SCM440 , 4140 , 4142 , 42CrMo4 , 42CrMoS4.


Applications of SCM440 SCM420 STEEL PIPES 

SCM440 are widely used in high toughness alloy structural steel. SCM420 is widely used in general structural steel.


Product Features:

1. High strength and toughness.

2. Great property of quenching and can be deep hardened.

3. Less tempering brittleness tendency.

4. Great machining performance under high temperature and nice appearance after machining.

5. Good performance in weld ability.

6. Excellent performance in impact absorption, such as where the hammer may bounce back and has barely any damage caused upon impact.


Conditions of heat treatment

SCM440

●Annealing: 830℃ Furnace Cooling

●Normalization: 830~880℃ Air Cooling

●Hardening: 830~880℃ Oil Cooling

●Tempering: 530~630℃ Rapid Cooling

SCM420

●Annealing: 850℃ Furnace Cooling

●Normalization: 850~900℃ Air Cooling

●Hardening: 850~900℃ 1st Oil Cooling, 800~850℃ 2rd Oil Cooling

●Tempering: 150~200℃ Air Cooling

Criterion for heat treating conditions revise:

SCM440

●Ac: 750~790℃

●Ar: 740~690℃

●Ms: 310℃

SCM420

●Ac: 770~835℃

●Ar: 770~700℃

●Ms: 410℃

Mechanical properties

SCM440

Tensile strength (kgf/mm²): ≧100

Yield strength (kgf/mm²): ≧85

Elongation (%): ≧12

Cross section reduction rate (%): ≧45

Impact value (J/cm2): ≧6

Hardness (Hb) : 285~352

SCM420

Tensile strength (kgf/mm²): ≧95

Elongation (%): ≧14

Cross section reduction rate (%): ≧40

Impact value (J/cm2): ≧6

Hardness (Hb) : 352~362


Size Range

Shape

Size(mm)

Round Bar

13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 24, 25, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 45, 46, 48, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 160, 170, 180, 190, 200, 210, 220, 230, 240, 250, 260, 270, 280, 290, 300, 315, 325, 335, 345, 355, 365, 375, 385, 395, 405, 415, 425, 435, 445, 455, 465, 475, 485, 495, 505, 515, 525, 535, 545, 555, 565, 575, 585, 595, 605.



Types of SCM440 SCM420 STEEL PIPES 

40Cr steel pipes tubes

Economical SCM440 STEEL tubes

SCM435 

42CrMo4 

42CrMo | AISI4140 Alloy Steel Round Bar 

JIS F 0014:2000 Glossary of terms for shipbuilding (hull part -piping)

JIS F 0301:1990 Schemes of thermal insulation of piping for small ships

JIS F 0414:1996 Shipbuilding - internal wiring and piping of engine control console

JIS F 0506:1996 Shipbuilding - applications of copper pipes

JIS F 0507:1992 Small ships - steel pipes - application

JIS F 2007:1976 Mooring pipes

JIS F 2030:1978 Single point mooring pipes

JIS F 3993:1996 Discharge pipes for dredger

JIS F 3994:1996 Floaters of discharge pipes for dredger

JIS F 3995:1991 Rubber sleeves for dredge discharge pipes

JIS G 3429:1988 Seamless steel tubes for high pressure gas cylinder

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JIS G 3442:2004 Galvanized steel pipes for ordinary piping

JIS G 3443:2004 Coated steel pipes for water service

JIS G 3444:2004 Carbon steel tubes for general structural purposes

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JIS G 3446:1994 Stainless steel pipes for machine and structural purposes

JIS G 3447:2004 Stainless steel sanitary pipes

JIS G 3448:2004 Light gauge stainless steel tubes for ordinary piping

JIS G 3451:1987 Fittings of coated steel pipes for water service

JIS G 3452:2004 Carbon steel pipes for ordinary piping

JIS F 7008:1996 Standard specification of thermal insulation for piping

JIS F 7101:1993 Pipes of ship's machinery - standard velocity of flow

JIS G3445 STKM11A STKM12A STKM12B STKM12C STKM13A STKM13B STKM13C STKMI4A STKM14B STKM14C STKM15A STKM18C STKM16A STKM18C STKM17A STKM17C STKM18A STKM18B STKM18C STKM19A STKM19C STKM20A STEEL TUBES

The types of EN10216-2 steel pipes

JIS G 3455:1988 Carbon steel pipes for high pressure service

JIS G 3456:2004 Carbon steel pipes for high temperature service

JIS G 3457:1988 Arc welded carbon steel pipes


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For more info and price of SCM440 SCM420 STEEL PIPES, please send us inquiry and you will have quick reply soon. 


Known as one of the professional manufacturers and suppliers of quality steel products, Petrol Steel Co.,Ltd is always at your service. Should you are interested in our Economical JIS G4105 SCM440 SCM420 Steel Pipes, you can check the mechanical properties, medical composition, hardness value and even the melting point with us first if you need. Now wholesale Economical JIS G4105 SCM440 SCM420 Steel Pipes in stock with our factory!

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