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 of SCM440 SCM420 STEEL PIPES

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 of SCM440 SCM420 STEEL PIPES

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

Annealing of SCM440 SCM420 STEEL PIPES

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

Quenching for SCM440 SCM420 STEEL PIPES

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 to SCM440 SCM420 STEEL PIPES

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

Heat treatment of SCM440 SCM420 STEEL PIPES grade material

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

Physical properties of SCM440 SCM420 STEEL PIPES

●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 of SCM440 SCM420 STEEL PIPES

●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 of SCM440 SCM420 STEEL PIPES material

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

Equivalent Grades of SCM440 SCM420 STEEL PIPES: 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 Type

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

SCM440 SCM420 STEEL PIPES Purpose

SCM440 are widely used in high toughness alloy structural steel.

SCM440 SCM420 STEEL PIPES 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.

SCM440 SCM420 STEEL PIPES Conditions of heat treatment

●Annealing: 830℃ Furnace Cooling

●Normalization: 830~880℃ Air Cooling

●Hardening: 830~880℃ Oil Cooling

●Tempering: 530~630℃ Rapid Cooling

Criterion for heat treating conditions revise:

●Ac: 750~790℃

●Ar: 740~690℃

●Ms: 310℃

SCM440 SCM420 STEEL PIPES Mechanical properties

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

SCM440 SCM420 STEEL PIPES Size Range

Shape

SCM440 SCM420 STEEL PIPES 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

40Cr steel 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

JIS G 3439 Seamless steel oil well casing, tubing and drill pipe

JIS G 3441:2004 Alloy steel tubes for machine purposes

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

JIS G 3445:1988 Carbon steel tubes for machine structural purposes

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 STEEL TUBES

JIS G3445 STKM12A STEEL TUBES

JIS G3445 STKM12B STEEL TUBES

JIS G3445 STKM12C STEEL TUBES

JIS G3445 STKM13A STEEL TUBES

JIS G3445 STKM13B STEEL TUBES

JIS G3445 STKM13C STEEL TUBES

JIS G3445 STKMI4A STEEL TUBES

JIS G3445 STKM14B STEEL TUBES

JIS G3445 STKM14C STEEL TUBES

JIS G3445 STKM15A STEEL TUBES

JIS G3445 STKM18C STEEL TUBES

JIS G3445 STKM16A STEEL TUBES

JIS G3445 STKM18C STEEL TUBES

JIS G3445 STKM17A STEEL TUBES

JIS G3445 STKM17C STEEL TUBES

JIS G3445 STKM18A STEEL TUBES

JIS G3445 STKM18B STEEL TUBES

JIS G3445 STKM18C STEEL TUBES

JIS G3445 STKM19A STEEL TUBES

JIS G3445 STKM19C STEEL TUBES

JIS G3445 STKM20A STEEL TUBES

JIS G3445 STKM 11A steel tubes

JIS G3445 STKM 12A steel tubes

JIS G3445 STKM 12B steel tubes

JIS G3445 STKM 12C steel tubes

JIS G3445 STKM 13A steel tubes

JIS G3445 STKM 13B steel tubes

JIS G3445 STKM 13C steel tubes

JIS G3445 STKM 14A steel tubes

JIS G3445 STKM 14B steel tubes

JIS G3445 STKM 14C steel tubes

JIS G3445 STKM 15A steel tubes

JIS G3445 STKM 15B steel tubes

JIS G3445 STKM 18A steel tubes

JIS G3445 STKM 18B steel tubes

JIS G3445 STKM 18C steel tubes

JIS G3445 STKM 19A steel tubes

JIS G3445 STKM 19C steel tubes

JIS G3445 STKM 20A steel tubes

The types of EN10216-2 steel pipes

JIS G 3454:1988 Carbon steel pipes for pressure service

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

SCM440 SCM440 STEEL PIPES SCM420 STEEL PIPES material Equivalent Grades: GB 20CrMo, JIS SCM420, ASTM 4118, DIN 25CrMo4. SCM440 SCM440 STEEL PIPES 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.

SCM440 SCM420 STEEL PIPES Purpose

SCM420 is widely used in general structural steel.

SCM440 SCM420 STEEL PIPES Conditions of heat treatment

●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

SCM440 SCM420 STEEL PIPES Criterion for heat treating conditions revise:

●Ac: 770~835℃

●Ar: 770~700℃

●Ms: 410℃

SCM440 SCM420 STEEL PIPES Mechanical properties

Tensile strength (kgf/mm²): ≧95

Elongation (%): ≧14

Cross section reduction rate (%): ≧40

Impact value (J/cm2): ≧6

Hardness (Hb) : 352~362

SCM440 SCM420 STEEL PIPES Size Range

Shape

SCM440 SCM420 STEEL PIPES 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.

SCM440 SCM420 STEEL PIPES Steel Type

SCM420 steel tubes

20Cr steel pipes

20Cr steel tubes

20CrMo steel pipes

4118 steel tubes

 25CrMo4 steel pipes

JIS G 3458 STPA 12 steel tubes

JIS G 3458 STPA 20 steel tubes

JIS G 3458 STPA 22 teel tubes

JIS G 3458 STPA 23 steel tubes

JIS G 3458 STPA 24 teel tubes

JIS G 3458 STPA 25 steel tubes

JIS G 3458 STPA 26 steel tubes

JIS G 3458:1988 Alloy steel pipes

JIS G 3459:2004 Stainless steel pipes

JIS G 3460:1988 Steel pipes for low temperature service

JIS G 3465:1988 Seamless steel tubes for drilling

JIS G 3466:1988 Carbon steel square pipes for general structural purposes

JIS G 3468 Large diameter welded stainless steel pipes

JIS G 3469:2002 Polyethylene coated steel pipes

JIS G 3471:1977 Corrugated steel pipes and sections

JIS G 3474:1995 High tensile strength steel tubes for tower structural purposes

JIS G 3491:2004 Asphalt protective coatings for steel water pipe

JIS G 3492:1993 Coal-tar enamel protective coatings for steel water pipe

JIS G 4903:1991 Seamless nickel-chromium-iron alloy pipes

JIS G 5201:1991 Centrifugally cast steel pipes for welded structure

JIS G 5202:1991 Centrifugally cast steel pipes for high temperature and high pressure service

JIS G 5525:2000 Cast-iron drainage pipes and fittings

JIS G 5526:1998 Ductile iron pipes

JIS G 5527:1998 Ductile iron fittings

JIS G 5528:1984 Epoxy-powder coating for interior of ductile iron pipes and fittings

JIS H 0502:1986 Method of eddy current testing for copper and copper alloy pipes and tubes

JIS H 0515:1992 Eddy current inspection of titanium pipes and tubes

JIS H 0516:1992 Ultrasonic inspection of titanium pipes and tubes

JIS H 3300:1997 Copper and copper alloy seamless pipes and tubes

JIS H 3320:1992 Copper and copper alloy welded pipes and tubes

JIS H 3401:2001 Pipe fittings of copper and copper alloys

JIS H 4080:1999 Aluminum and aluminum alloys extruded tubes and cold-drawn tubes

JIS H 4090:1990 Aluminum and aluminum alloy welded pipes and tubes

JIS H 4202:1998 Magnesium alloy seamless pipes and tubes

JIS H 4311:1993 Lead and lead alloy tubes for common industries

JIS H 4312:2000 Polyethylene lining lead pipes for water supply

JIS H 4552:2000 Nickel and nickel alloy seamless pipes and tubes

JIS H 4630:2001 Titanium and titanium alloy seamless pipes

JIS H 4635:2001 Titanium and titanium alloy welded pipes

JIS R 1201:1991 Clay pipes

JIS R 1511:1991 Conical flanged straight pipes of acid proof porcelains for chemical industry

JIS R 1512:1991 Conical flanged 90 degrees bent pipes of acid proof porcelains for chemical industry

JIS R 1513:1991 Conical flanged 45 degrees bent pipes of acid proof porcelains for chemical industry

JIS R 1514:1991 Conical flanged tee pipes pipes of acid proof porcelains for chemical industry

JIS R 1534:1991 Metal joint for conical flanged pipes of acid proof porcelains for chemical industry

JIS S 2080:1994 Exhaust pipes for burning appliances

JIS S 3028:1994 Oil discharge copper pipe for oil burning appliances

JIS T 7101:1993 Medical gas pipeline systems

JIS T 9211:1990 Pipes for endoskeletal type of lower limb prostheses

ONE OF THE KIND, MILLIONS OF CHOICES

SUPERIOR QUALITY

PROMPT DELIVERY

FAVORABLE FEEDBACK

ALL AVAILABLE IN PESCO

SELECT PESCO, YOU WILL BE RIGHT

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!