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ASTM 4140 SCM440 42CrMo4 1.7225 Alloy Rolled Steel Bar

Type: 4140 Rolled Steel
Standard: AISI, ASTM,  GB, DIN, JIS, BS
Technology: Hot Rolled/Forged/Cold Drawn
Form: Round Bars/ Flat Bar / Blocks/ Tube
Surface: Black; Peeled; Polished; Machined; Grinded; Turned
Process: Eaf+Lf+Vd+Forged+Heat Treatment(Optional)
Certificate: ISO/ Mill Certificate   
Warranty: Three Years
Sample Supply: Yes
 
 
Availability:
Quantity:
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  • 4140

  • Qilu

Product Description

ASTM 4140 SCM440 42CrMo4 1.7225 Alloy Rolled Steel Bar


1: AISI 4140 Steel Introduction

AISI 4140 is defined as a low alloy steel which has 1% Cr-Mo as strengthening alloy elements.Compared with AISI 4130, it has a higher carbon content with good balance of strength, toughness ,abrasion and impact resistance and heat treatment capabilities,but poor in weldability characteristics.SAE 4140 is generally supplied in quenched and tempered condition with hardness 28-32HRC.


4140热轧

4140 Steel Stock in Warehouse


2: AISI 4140 Quality Standard

AISI 4140 steel according to ASTM A29-05.


3: AISI 4140 Steel Equivalent

Country

China

Japan

Germany

USA

British

Standard

GB/T 3077

JIS G4105

DIN (W-Nr.)
EN 10250

AISI/ASTM
ASTM A29

BS 970

Grade

42CrMo

SCM440

42crmo4/1.7225

4140

EN19/709M40


4: AISI 4140 Steel Chemical Composition

Grade

C

Si

Mn

P

S

Cr

Mo

42CrMo

0.38-0.45

0.17-0.37

0.5-0.80

≤0.035

≤0.035

0.9-1.2

0.15-0.25

SCM440

0.38-0.43

0.15-0.35

0.6-0.85

≤0.035

≤0.04

0.9-1.2

0.15-0.30

42crmo4/1.7225

0.38-0.45

≤ 0.4

0.6-0.9

≤0.025

≤0.035

0.9-1.2

0.15-0.30

4140

0.38-0.43

0.15-0.35

0.75-1.00

≤0.035

≤0.04

0.8-1.1

0.15-0.25

EN19/709M40

0.35-0.45

0.15-0.35

0.5-0.80

≤0.035

≤0.035

0.9-1.5

0.2-0.40


5: AISI 4140 Steel Mechanical Properties

Grade

Tensile

strength
σb(MPa)

Yield

strength
σs (MPa)

Elongation
δ5 (%)

Reduction
ψ (%)

Impact

Value
Akv (J)

Hardness

4140

≥1080

≥930

≥12

≥45

≥63

28-32HRC


6: Qilu Company Profile

Hunan Qilu was engaged in steel exporting since 2008 year, the former was the sales company for Qilu Special Steel co.,ltd which was founded in 1986 year. Now Hunan Qilu Metal is one of most professional steel manufacturer and exporter in China. We already exported steel material to Germany, UK, Ireland, Greece, Italy, Poland,Belgium, Estonia, Latvia, Spain, France, Netherlands, Portugal, Czech republic, Finland, Russia, Belarus, Canada, Mexico, Brazil, Chile, Colombia, Peru, Argentina, Venezuela, Thailand, Indonesia, Vietnam, Singapore, Malaysia, Philippines, UAE, South Africa, Zambia, Australia etc.


Factory


7: Production Equipment

The company owns advanced special steel smelting facilities and forging processing equipment, the main steel-making equipment include 2 set of 50t and 25t ultra-high power electric arc furnaces, 2 set of 60t and 30t LF refining furnaces, 2 set of 60t and 30t vacuum degassing refining furnace. 4 sets of 1-20t electroslag re-melting furnaces.

The main forging equipment mainly include:3 sets of 3t 5t and 8t electro-hydraulic hammers, 3 sets of high-speed forging units of 1600t, 2000t and 4500t respectively.


Production Equipment


8: Our Company Certificate


We already passed ISO 9000 : 2015 certificate of quality system, and we could supply steel forging material with all kinds of Classification Society Certification, such as ABS, ,DNV, BV, CCS etc. We also supplied steel material to oil industry with API certificate, such as API20B, API6A etc.


Certificate


9: Stock&Warehouse

Besides forging material, we also supply hot rolled material from Dongbei special steel, Tiangong, Changcheng special steel, Lihuai Special Steel, Laisteel, Juneng steel, Yongsteel, Xinxin steel, Shijiazhuang steel etc. We have two warehouses for hot rolled material. Further processing such as heating treatment, rough machining and milled are also provided by us.


Stock


10: AISI 4140 Steel Overviews

Size

Round

Dia 6-1200mm

Plate/Flat/Block

Thickness
6mm-500mm

Width
20mm-1000mm

Heat treatment

Normalized ; Annealed ; Quenched ; Tempered

Surface condition

Black; Peeled; Polished; Machined; Grinded; Turned; Milled

Delivery condition

Forged; Hot rolled; Cold drawn

Test

Tensile strength, Yield strength, elongation, area of reduction, impact value,

hardness, grain size, ultrasonic test, US inspection, magnetic particle testing, etc.

Payment terms

T/T;L/C;/Money gram/ Paypal

Trade terms

FOB; CIF; C&F; etc..

Delivery time

30-45 days


11: AISI 4140 Steel Tolerance


Diameter(mm)

Tolerance

Forged Steel Round Bar

80-600

Black Surface:0~+5

Rough Machined or Turned:0~+3

650-1200

Black Surface:0~+15

Rough Machined or Turned:0~+3

Hot Rolled Steel Round Bar

16-310

Black Surface:0~+1

Peeled:H11

Cold Drawn Steel Round Bar

6-100

Black Surface:H11

Peeled:H11


12: Packing& Delivery

For the delivery, we will choose LCL, FCL and Bulk carrier according to order quantity. Usually if the quantity is less than 10tons, we will recommend LCL. If the quantity is more than 100tons, we will recommend bulk carrier. Usually FCL will be the most common for delivery.

In order to better ensure the safety of your goods, we will provide professional, environmentally friendly, convenient and efficient packaging services. Such as pallet, wooden box, package with woven bag etc.


Packing&Delivery


13: AISI 4140 Steel Heat Treatment

Annealing
Heat ASTM 4140 steels to 800 ℃ – 850℃, hold until temperature is uniform throughout the section and cool in furnace.
Normalizing
Heat steel alloy 4140 to 870 ℃ – 900 ℃, 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 ℃ – 700 ℃ 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
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 ℃ – 875 ℃, 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.


14: AISI 4140 Steel Application

ASTM 4140 steel finds many applications as forgings for the aerospace,oil and gas,automotive, agricultural and defense industries etc.
Typical applications for 4140 steel uses include:forged gears,spindles,fixtures,jigs,collars,Axles,conveyor parts,crow bars,logging parts,shafts,sprockets,studs,pinions,pump shafts, rams, and ring gears etc.


15: Delivery Condition

For hot forged or hot rolled bar, usually the delivery condition is hot forged or rolled, annealed or QT, black surface or rough turned.
For hot forged plate, usually the delivery condition is hot forged, annealed or QT, milled surface.
For hot rolled plate, usually the delivery condition is hot rolled, annealed or QT, black surface.


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Hunan Qilu Metal is one of the professional steel manufacturers and exporters in China, with multiple certificates such as ISO9001. Our products can be produced according to customer requirements, with a small minimum order quantity and affordable prices.

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Email:enquiry@qilumetal.com
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