Q+T Alloy Steel Round Bar1.7225 SAE4140 for Machinery

Q+T Alloy Steel Round Bar1.7225 SAE4140 for Machinery

Alloy Steel Spherical Bar one.7225/SAE4140 For CZPT Q+T

Solution Introduction
AISI 4140 Steel Bar, Steel Plate, Flats Supplier, Stockist and Exporter. AISI SAE 4140 alloy metal is a chromium molybdenum alloy steel specification commonly used in basic goal high tensile steel for factors, like axles, shafts, bolts, gears and other apps. Equivalent to alloy grade AISI 4130 chrome moly alloy metal but with a marginally greater carbon material. The greater carbon articles of AISI 4140 steel offers higher energy and warmth treatment abilities in comparison to AISI / ASTM 4130 alloy steels, even so it does have inferior weldability characteristics.

Equal Grades(numbers)

Region Usa German British Japan China Australia
CZPT ASTM A29 DIN 17200 BS 970 JIS G4105 GB/T 3077 AS 1444
Grades 4140 one.7225/
42CrMo4 SCM440 42CrMo 4140

Chemical Composition

CZPT Grade C Mn P S Si Cr Mo
ASTM A29 4140 .38-.43 .75-1.00 .035 .040 .fifteen-.35 .eight-one.10 .15-.twenty five
EN 15710 42CrMo4/
.38-.45 .six-.9 .035 .035 .4 .nine-1.two .fifteen-.thirty
JIS G4105 SCM440 .38-.forty three .sixty-.eighty five .03 .03 .fifteen-.35 .9-one.two .fifteen-.thirty


Mechanical Homes Metric Imperial
Tensile power 655 MPa 95000 psi
Yield power 415 MPa 65710 psi
Bulk modulus (common for metal) 140 GPa 20300 ksi
Shear modulus (normal for metal) eighty GPa 11600 ksi
Elastic modulus a hundred ninety-210 GPa 27557-3 0571 ksi
Poisson’s ratio .27-.thirty .27-.30
Elongation at crack (in fifty mm) twenty five.70% 25.70%
Hardness, Brinell 197 197
Hardness, Knoop (transformed from Brinell hardness) 219 219
Hardness, Rockwell B (converted from Brinell hardness) ninety two 92
Hardness, Rockwell C (transformed from Brinell hardness. Benefit underneath regular HRC variety, for comparison reasons only) thirteen thirteen
Hardness, Vickers (transformed from Brinell hardness) 207 207
Machinability (based mostly on AISI 1212 as a hundred machinability) sixty five sixty five

Preheat the steel meticulously, heat to 1150 oC – 1200 oC greatest, hold right up until temperature is uniform throughout the area.
Do not forge beneath 850 oC.Following forging procedure the operate piece should be cooled as little by little as feasible.

 Heat Therapy

  • Annealing
    Heat ASTM 4140 steels to 800 oC – 850 oC, maintain right up until temperature is uniform through the section and great in furnace.
  • Normalizing
    Heat metal alloy 4140 to 870 oC – 900 oC, hold right up until temperature is uniform throughout the part, soak for ten – fifteen minutes and awesome in nevertheless air.
  • Tempering
    Re-warmth 4140 grade metal to 550 oC – seven hundred oC as required, maintain until finally temperature is uniform all through the area, soak for 1 hour for each 25 mm of area, and amazing in even now air.


AISI alloy 4140 steel bar, plate and square can be hardened by cold functioning, or heating and quenching.
SAE 4140 alloy metal is typically supplied ready heat treated to hardness in 18-22 HRC. If further warmth remedy is essential, then heat to 840 oC – 875 oC, keep until temperature is uniform through the section, soak for 10 – fifteen minutes per 25 mm part, and quench in oil, water, or polymer as essential.


ASTM alloy 4140 metal bar, flat or plate substance can be utilised for as wide variety of apps in which increased toughness and put on resistance is needed in excess of lower carbon grades. Normal applications for 4140 tool steel uses contain Factors, Adapters, Arbors,strippers, holder blocks, mold bases, ejectors, back up and help 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, equipment racks, chain hyperlinks, spindles, tool bodies, device holders, tie rods, Link Rods, Chuck Bodies, Collets, CZPT Pins & Rolls, Ejector Pins, Forks, Gears, Xihu (West Lake) Dis. Rods, CZPT Shafts & Components,Lathe Spindles, Logging Components, Milling Spindles, Motor Shafts, Nuts, Pinch Bars, Pinions, Pump Shafts,boring bars,tracks, slides, wear strips or areas, forming dies, brake dies, trim dies, bolsters, equipment elements and parts, etc.
Welcome customers to inquiry AISI 4140 steel bar, plate, flat steel for the 4140 steel value. We are expert provider and exporter for far more than 20 many years. We supply you CZPT remedy for aisi alloy 4140 steel bar.

Available Dimensions in Stock 

Steel Grade Diameter(mm) Size(mm) Harness(HRC)
SCM440/SAE4140 sixteen,eighteen,twenty,23,25,28,30,33,35,38,40,forty three,45,48,50,                                                             55,sixty,65,70,75,eighty,eighty five,90,95,one hundred,one hundred ten,one hundred twenty,a hundred thirty,a hundred and forty,               150,160,one hundred seventy,one hundred eighty,a hundred ninety,two hundred,210,220,230,240,250,260,                            270,280,290,three hundred,310,320,330,340,350,360,370,380,    390,four hundred,410,420,430,440,450 4000-ten thousand HB160-220

Much more Picutres



About us :
HK JIMI STEEL  Was established in 2012, positioned in the Xihu (West Lake) Dis. District of ZheJiang Province, It is an import and export investing firm largely engaged in superior specific steel, die steel, alloy steel, and steel processing standard machinery and tools. The company adheres to the concept of “high high quality, higher requirements and very good religion”, 

Cooperating with much more than twenty famous metal mills in China, abundant in spot inventory of products. 

Our organization has a variety of processing tools and all types of inspection and testing equipment, these kinds of as horizontal sawing device, vertical sawing machine, milling machine, bilateral milling device, precision milling equipment, plane grinder and so on. The items with brief creating time, outstanding high quality and higher precision can offer a high-good quality merchandise option for the huge quantity of buyers at property and abroad. 

Our client group unfold all in excess of the domestic provinces and towns, overseas like CZPTpe, the United States, Australia, the Center East, Southeast Asia and other far more than twenty countries and areas, alongside with in excess of a hundred long-phrase steady cooperation buyers…Deciding on Xingxiong will bring you a much better encounter. 

CZPT MOULD Steel: 1.2311, one.2312, one.2738, P20, 1.2083, 1.2316, NAK80, P40, 1.2738HH

Very hot Operate MOULD Metal: 1.2344, SKD61, H13, H11, FDAC, 8407

Cold WORL MOULD Metal: SKD11, D3, SKS3, 1.2080, 1.2379, CR12MOV, O1, D2

STRUCTURAL ALLOY Metal: 4140, 20CR, 40Cr, 35CrMo, 42CrMo, 38CrmoAi, SCM440, SCM420, 1.7225

CARBON Metal &: Q235, Gcr15, S45C, S50C, S55C

CNC surface area grinding machine, CNC aspect boring device, Band noticed, CNC double head equipment, Vertical Band observed, CNC milling machine, CZPT alloy saw blade, wireless remote management crane, Magnetic chuck.

Our Service:
A. Steel plates: Cutting by bandsaw machine, milling, heat treatment, etc
B. Round bars: Cutting by bandsaw machine, peeling, grinding and turned, heat treatment, etc


Higher-top quality inventory for different steel flat bar and spherical bar.
Alloy metal / Chilly operate steel / Sizzling perform steel / Plactic mildew metal and Stainless 
Scorching revenue quality : DC53/ H13 / P20 / SCM440 / Q235,and many others.

For a lot more resource and die steel you should check the list:

Delivery Time

1) For abundant stock, 7-15 days.
two) For CZPT goods, fifteen-thirty times.

Loading Information:


Q1: What do you do for the manage of the quality?

A1:  Before loading into the container, our products will all be inspected by ultrasonic inspection. Quality Grade conforms to SEP 1921-84 E/e, D/d, C/c as for each customer’s ask for.

Q2:: What are your very hot-marketing products?

A2: D2/1.2379, H13/one.2344, CR12MOV, DC53, CR8, ample inventory for equally plates and rounds. Competitive charges and limited guide-time.

Q3: Can we visit your business and manufacturing unit? 
A3: Sure, warmly welcome! We can guide the lodge for you before you arrive to China and set up our driver to our airport to choose you up when you appear. 

This fall: Are you a manufacturer or just a trader? 
A4: We are a group of businesses and owned manufacturer bases and buying and selling companies. We specialized in plastic mold steel, very hot operate mold steel, cold perform mildew steel, alloy steel for mechanical, high-pace steel, and so on. All resources are of substantial quality and competitive rates. 

Scorching sales Product:

1.2344                               SKD11                                       D3                                   DC50

Q+T Alloy Steel Round Bar1.7225 SAE4140 for Machinery