ASTM 4140 / EN 42CrMo4 1.7225 Alloy Steel Bar / Rod Forged
130-1600mm
INTRODUCTION
AISI SAE 4140 alloy steel is a chromium molybdenum alloy steel
specification widely used in general purpose high tensile steel for
components, like axles, shafts, bolts, gears and other
applications. Similar to alloy grade AISI 4130 chrome moly alloy
steel but with a slightly higher carbon content. The higher carbon
content of AISI 4140 steel gives greater strength and heat
treatment capabilities in comparison to AISI / ASTM 4130 alloy
steels, however it does have inferior weldability characteristics.
APPLICATIONS
ASTM alloy 4140 steel bar, flat or plate material can be used for
as wide variety of applications where greater toughness and wear
resistance is needed over lower carbon grades.
Typical applications for 4140 tool steel uses include:
Components, Adapters, Arbors,strippers, holder blocks, mold bases,
ejectors, back up and support tooling, fixtures, jigs, molds, cams,
drill collars, Axle Shafts, Bolts, Crankshafts,stubs, couplings,
reamer bodies, axles, shafting, piston rods, rams, hydraulic
machinery shafts, gears, sprockets, gear racks, chain links,
spindles, tool bodies, tool holders, tie rods, Connection Rods,
Chuck Bodies, Collets, Conveyor Pins & Rolls, Ejector Pins, Forks,
Gears, Guide Rods, Hydraulic Shafts & Parts,Lathe Spindles, Logging
Parts, Milling Spindles, Motor Shafts, Nuts, Pinch Bars, Pinions,
Pump Shafts,boring bars,tracks, slides, wear strips or parts,
forming dies, brake dies, trim dies, bolsters, machinery parts and
components, etc.
SUPPLY RANGE OF ALLOY 4140
-Dimension: Diameter 4-1600 mm, any length below 16 meters-Delivery Conditions:
Cold drawn: 4-100 mm
Peeled: 30-160 mm
Grinded: 4- 600 mm
Turned: 130-1200 mm
Hot rolled: 12-320 mm
Hot forged: 130-1600 mm
-EAF+(ESR) or EAF+LF+VD+(ESR)
-HOT rolled; Cold rolled; Forged; Cold Drawn
-Heat Treatment: Untreated, Annealing, N+T, Q+T
-Smelting: EAF+LF+VD (+ESR)
-Surface Finish: Black, Rough Machined, Peeled, Turned or upon request
-UT 100% passed
-Cutting service provided
-Third Party inspection is acceptable (SGS, BV etc.)
COMMON 4140 STEEL EQUIVALENCY
| Country | USA | German | British | Japan | China | Australia |
| Standard | ASTM A29 | DIN 17200 | BS 970 | JIS G4105 | GB/T 3077 | AS 1444 |
| Grades | 4140 | 1.7225/
42crmo4 | 42CrMo4 | SCM440 | 42CrMo | 4140 |
4140 STEEL BAR CHEMICAL COMPOSITION
| Standard | Grade | C | Mn | P | S | Si | Cr | Mo |
| ASTM A29 | 4140 | 0.38-0.43 | 0.75-1.00 | 0.035 | 0.040 | 0.15-0.35 | 0.8-1.10 | 0.15-0.25 |
| EN 10250 | 42CrMo4/
1.7224 | 0.38-0.45 | 0.6-0.9 | 0.035 | 0.035 | 0.4 | 0.9-1.2 | 0.15-0.30 |
| JIS G4105 | SCM440 | 0.38-0.43 | 0.60-0.85 | 0.03 | 0.03 | 0.15-0.35 | 0.9-1.2 | 0.15-0.30 |
MECHANICAL PROPERTIES OF AISI ALLOY 4140 STEEL BAR
| Properties | Metric | Imperial |
| Tensile strength | 655 MPa | 95000 psi |
| Yield strength | 415 MPa | 60200 psi |
| Bulk modulus (typical for steel) | 140 GPa | 20300 ksi |
| Shear modulus (typical for steel) | 80 GPa | 11600 ksi |
| Elastic modulus | 190-210 GPa | 27557-30458 ksi |
| Poisson’s ratio | 0.27-0.30 | 0.27-0.30 |
| Elongation at break (in 50 mm) | 25.70% | 25.70% |
| Hardness, Brinell | 197 | 197 |
| Hardness, Knoop (converted from Brinell hardness) | 219 | 219 |
| Hardness, Rockwell B (converted from Brinell hardness) | 92 | 92 |
| Hardness, Rockwell C (converted from Brinell hardness. Value below
normal HRC range, for comparison purposes only) | 13 | 13 |
| Hardness, Vickers (converted from Brinell hardness) | 207 | 207 |
| Machinability (based on AISI 1212 as 100 machinability) | 65 | 65 |
PROCESSING
Preheat the steel carefully, heat to 1150 oC – 1200 oC maximum,
hold until temperature is uniform throughout the section.
Do not forge below 850 oC.Following forging operation the work
piece should be cooled as slowly as possible.
AISI 4140 Steel Grade Heat Treatment
- Annealing
Heat ASTM 4140 steels to 800 oC – 850 oC, hold until temperature is
uniform throughout the section and cool in furnace. - Normalizing
Heat steel alloy 4140 to 870 oC – 900 oC, hold until temperature is
uniform throughout the section, soak for 10 – 15 minutes and cool
in still air. - Tempering
Re-heat 4140 grade steel to 550 oC – 700 oC as required, hold until
temperature is uniform throughout the section, soak for 1 hour per
25 mm of section, and cool in still air.
Hardening of AISI Alloy Steel 4140
AISI alloy 4140 steel bar, plate and square can be hardened by cold
working, or heating and quenching.
SAE 4140 alloy steel is usually supplied ready heat treated to
hardness in 18-22 HRC. If further heat treatment is required, then
heat to 840 oC – 875 oC, hold until temperature is uniform
throughout the section, soak for 10 – 15 minutes per 25 mm section,
and quench in oil, water, or polymer as required.
What we can offer?
-We offer a wide range of steel products in a wide variety of
dimensions and executions, according to the common international
specifications or customize.
-Machining and heat treatment are available.
-Also, we advise you in choosing the right materials.
Shape Available
- Solid round bar
- Flat bar
- Square bar
- Hexagon bar
- Block
- Plate
- Sheet
- Wire rod
- Strip
Our Advantages
- High mechanical property and quenching, enable the surface share
equal hardness after deal with it
- Good polishing and low roughness
- Making the heat-treatment to harden condition before using it
- Competitive price
- Fast production lead-time
- All the material are inspected with 3 times to meet the highly
standards
- Pure steel quality & stable quality to be guarantee
OUR MAIN PRODUCTS ARE LISTED AS BELOW
Notes:
Available Size:
-Round: Dia. 4-1600 mm
-Flat: T. 10-120 mm x W. 60-810 mm
-Block: T. 80-1200 mm x W. 100-1600 mm
PAYMENT AND SHIPPING
1. Both T/T and L/C will be acceptable
2. Trade Terms: FOB, CIF, CFR
3. The delivery will be in 10-15 days if have stock; For customized
items, the delivery will be negotiated by both parties
4. Shipping by sea freight from Shanghai Port (PRC) for Bulk
orders, by airfreight or express for samples
COMPANY INFORMATION
Shanghai Unite Steel Trading Co., Ltd
We are committed to integrate engineering steel resources in china
and serve the global engineering steel market. Our company has more
than 15 years of experience in steel researching, production,
managing and sales. And our team mostly are based on and worked in
national famous steel enterprise.
In the aspect of resources and information, we have established
cooperative and stronger relationship with nearly hundred
enterprises, either state-owned or private owned in china.
What’s more, we have built long, deep and close business
relationship with dozens of steel company, Sharing and holding
equities with several steel enterprises. Because of the close
cooperation with steel companies and our pioneering spirit, which
can ensure us stay at the top competition, and ensure our customers
get what they really want!
FAQ
Q: Are you a manufacturer or merely a trader?
A: We are group of companies and owned manufacturer bases and
trading company. We specialized in special steel which include
alloy structural steel and carbon steel and stainless steel, etc.
All material are with high quality and competitive price.
Q: How do you guarantee the quality of your product?
A: Firstly, we can provide the certificates from the third party,
such as TUV, CE, if you need. Secondly, we have a complete set of
inspection system and every process is checked by QC. Quality is
the lifeline of enterprise survival.
Q: Delivery time?
A: We have ready stock for most of material grades in our
warehouse. If the material doesn't have stock, the delivery lead
time is about 5-30 days after receiving your prepayment or firm
order.
Q: What is the payment term?
A: T/T or L/C.
Q: Can we visit your company and factory?
A: Yes, warmly welcome! We can book the hotel for you before you
come to China and arrange our driver to our airport to pick you up
when you come.
