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You are here: Home- NewsSAE 1020 carbon steels pipe/tube Heat treatment

SAE 1020 carbon steels pipe/tube Heat treatment

Posted:2016/8/4 21:15:19

 

SAE 1020 carbon steels pipe/tube Heat treatment

 

 

 

The SAE 1020 steel is one of the most common carbon steels used as steel for hardening with excellent value for money compared to most alloy steels for the same purpose. It has excellent plasticity and solderability.

 

SAE 1020

Chemical composition: C=0.20%, Mn=0.45%, P=0.04% max, S=0.05% max

Property

Value in metric unit

Value in US unit

Density

7.872 *10³

kg/m³

491.4

lb/ft³

Modulus of elasticity

200

GPa

29000

ksi

Thermal expansion (20 ºC)

11.9*10-6

ºCˉ¹

6.61*10-6

in/(in* ºF)

Specific heat capacity

486

J/(kg*K)

0.116

BTU/(lb*ºF)

Thermal conductivity

51.9

W/(m*K)

360

BTU*in/(hr*ft²*ºF)

Electric resistivity

1.59*10-7

Ohm*m

1.59*10-5

Ohm*cm

Tensile strength (hot rolled)

380

MPa

55100

psi

Yield strength (hot rolled)

165

MPa

29700

psi

Elongation (hot rolled)

25

%

25

%

Hardness (hot rolled)

66

RB

66

RB

Tensile strength (cold drawn)

420

MPa

60900

psi

Yield strength (cold drawn)

205

MPa

50800

psi

Elongation (cold drawn)

15

%

15

%

Hardness (cold drawn)

73

RB

73

RB

 

SAE 1020 Usage 
It is used in mechanical components for use as gears, shafts, crankshafts, camshafts, guide pins, gear rings, columns, turnstiles, covers.

 

SAE 1020 Heat treatment
Annealing
: The treatment should be done at temperatures between 850 – 870ºC for at least 1 hour for every 25 mm. Cool slowly in the oven.

Standardization: The treatment should be done at the temperature of 920 – 950 ° C for at least 1 hour for every 25 mm. Cool air. In special cases can use forced air.

Carburizing: the hardening process can be used in cash, gas or salt bath. The temperature should be between 900 – 925ºC. The hardening time should be controlled according to the carbon potential and the hardening depth specified. The cementation should be followed by improvement.

Quenching: Quenching can be performed directly after hardening simply by that decrease the temperature to 840 – 850 ° C, maintaining the time necessary to homogenize the temperature in cross section and cooling water. The quenching can also be performed after the carburizing components with cooling to room temperature. In this case, using the same procedure described.

Tempering: It must be done immediately after hardening when the temperature reaches about 70 ° C. The tempering is performed at temperatures between 150 – 200 ° C. The tempering there is no significant drop in hardness, but it ensures better resistance to fracture and the formation of surface cracks on grinding.

Nitriding: 0 This steel can be nitrided to increase the wear resistance of the surface hardening. For nitriding the component should be in the annealed condition. The nitriding process can be by gas or plasma. The presence of White Layer is indispensable, with a thickness exceeding 12 m.

 

Katalor is China's leading supplier of SAE 1020 carbon steels,we provide SAE 1020 steel tube,SAE 1020 steel pipe and more. If you need ,please to contact:

Phone: 0086-18317160019
TEL: 0086-21-61182423
Fax: 0086-21-61182425
E-mail: [email protected]
Skype: shanghai.katalor
Address : Room 301,Unit 6,lane 2500,xiupu Road,Kangqiao Industrial Area,Pudong New District,Shanghai

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