Category Archives: Uncategorized

AISI / Alloy Steel 8720

Chemical Analysis
C% Carbon
0.18 – 0.23
Mn% Manganese
0.70 – 0.90
P% Phosphorus
0.035 max
S% Sulfur
0.040 max
Si% Silicon
0.20 – 0.35
Ni% Nickel
0.40 – 0.70
Cr% Chromium
0.40 – 0.60
Mo% Molybdenum
0.20 – 0.30

General characteristics of Alloy Steel 8720

Alloy steel 8720 is a case-hardening low-alloy steel containing nickel, chromium and molybdenum as alloying elements.

Applications

This alloy may be used in the production of medium-strength parts such as forged camshafts, fasteners and gears.

Forging

This alloy is forged at a start temperature of around 2250ºF (1230ºC) and could be forged down to approximately 1700ºF(925ºC.) The alloy is air cooled after forging.

Heat treatment

Annealing: For optimum machinabilty, an as-forged structure is normally sufficient for this grade of alloy steel. If this proves not to be the case then an iso-anneal from around 1650ºF (900ºC) to 1225ºF (660ºC) will improve machinability.

Normalizing: 1700ºF (925ºC) and air cool. This is another method of improving machinability in this grade; normalizing might also be used prior to case hardening.

Hardening: The alloy will be austenitized at around 1550ºF (840ºC) and oil or water quenched depending upon section size and intricacy.

Tempering : to desired hardness, using temperatures based on past experience, following water or oil quench.

Machinability:This grade of alloy is readily machined following suitable heat treatment.

Weldability: This steel may be welded by normal fusion methods, but prior to any heat treatment that will modify the steel’s properties.

To Send a Request for Quote, please Click Here, or call 1.973.276.5000 or 1.800.600.9290 or fax 1.973.276.5050.

ALLOY STEEL 4615

Chemical Analysis
C% Carbon
0.13 – 0.18
Mn% Manganese
0.45 – 0.65
Si% Silicon
0.20 – 0.35
P% Phosphorus
0.035 max
S% Sulfur
0.040 max
Ni% Nickel
1.65 – 2.00
Mo% Molybdenum
0.20 – 0.30

General characteristics of Alloy Steel 4615

This is a nickel-molybdenum alloy steel that is normally used in a carburized condition

Applications

This alloy is used for parts where strength and toughness are required, such as forged gears and shafts.

Forging

The alloy is forged at a maximum temperature of 2275ºF (1245ºC) and should not be forged below 1650ºF (925ºC).

Heat treatment

Annealing

This grade does not normally require annealing, and machining may be carried out after either normalizing or following an isothermal anneal – 1290ºF (700ºC) for 8 hours – after forging.

Normalizing

This grade is normalized at a nominal temperature of 1700ºF (925ºC) followed by air cooling.

Hardening

A maximum hardness of Rc 35-40 may be obtained from this grade by direct hardening. Surface hardening is normally by carburizing or carbonitriding, when surface hardnesses of Rc 60-65 are easily obtainable.

Tempering

Tempering will be carried out after surface hardening at temperatures based on acquired experience.

Process routing

This grade might typically be processed as follows:

Forge – Normalize – Anneal (optional) – Rough and Semi-finish machine – Case harden – Temper – Finish machine (case-hardened parts only.)

Machinability

As noted above, this alloy is readily machinable providing appropriate heat treatments are carried out.

Weldability

This grade may be welded in the normalized or annealed condition, but should not be welded in the surface-hardened state.

To Send a Request for Quote, please Click Here, or call 1.973.276.5000 or 1.800.600.9290 or fax 1.973.276.5050.

New RFQ test

Request for Quote

To properly respond to a quote, we need the information below.











*


*
 


*



*



*

Request Quote for the following, please include shipping address if you want to quote shipping.
*

Attach File

Join our subscribers
 


LIVE FROM ISM 2015 Phoenix, AZ

Join us with the ISM as they celebrate 100 years of setting the standard for excellence in the supply chain and procurement field at the ISM 2015 Annual Conference.

ism2015Manufacturing Talk Radio will be broadcasting live from booth 739 at the ISM 2015 Annual Conference in Phoenix Arizona, May 3-6. If you are attending the conference, please stop by booth 739 and say hello. We’d love to hear your manufacturing story, get some feedback on the show and maybe talk about being a guest on our show. If you can’t make it to Phoenix, you can listen to our live broadcast, on Tuesday, May 5th plus we’ll be recording and broadcasting interviews throughout the day including live streaming video from the heart of ISM2015. Follow us on twitter and Facebook for updates on upcoming broadcasts and breaking manufacturing news.

 

Learn more here