AISI 4140 Scm440 42CrMo4/1.7225 En19/709m40 Forging Alloy Round Steel

• Type: Special Steel Bar
• Standard: AISI, ASTM, DIN, JIS, GB, BS
• Composition: Alloy Steel
• Model NO.: 4140
• Technique: Forged
• Shape: Round/Flat/Block/Square/Bar/Plate
• Surface Treatment: Black Surface/Turned/Rough Machined/Peeled
• Special Use: Wear Resistant Steel, Free Cutting Steel, Mold Steel, Engineering Steel
• Application: Structural Steel Bar
• Quality Inspection: Ut, Chemical Composition, Physical Properties/SGS
• Non-Metallic Inclusiton: ASTM E45
• Grain Size: ASTM E112
• Length: 3-5.8m, or as Per Request
• Heat Treatment: Annealed/Normalized/Q+T
• Transport Package: Nude Packing
• Specification: check detailed description
• Trademark: Ningbo Ningshing
• Origin: China

Product Description

AISI 4140 Scm440 42CrMo4/1.7225 En19/709m40 Forging Alloy Round Steel

Equivalence

AISI/SAE			DIN/W.Nr			JIS			GB
4140			42CrMo4			SCM440			42CrMo
			42CrMoS4
			1.7225

Chemical Composition (%)

Steel Grade		C		Si		Mn		P		S		Cr		Mo
42CrMo4 1.7225		0.38		≤		0.60		≤		≤		0.90		0.15
		0.45		0.40		0.90		0.035		0.035		1.20		0.30
42CrMoS4		0.38		≤		0.60		≤		0.020		0.90		0.15
		0.45		0.40		0.90		0.035		0.040		1.20		0.30
4140		0.38		0.15		0.75		≤		≤		0.80		0.15
		0.43		0.35		1.00		0.035		0.040		1.10		0.25
SCM440		0.38		0.15		0.60		≤		≤		0.90		0.15
		0.43		0.35		0.85		0.035		0.040		1.20		0.30
42CrMo		0.38		0.17		0.50		≤		≤		0.90		0.15
		0.45		0.37		0.80		0.035		0.035		1.20		0.25

Dimensions

			Hot Rolled			Forged			Cold Drawn
Diameter(mm)			10-260			150-1500			2.5-70
Length(mm)			4000-10000			3000-10000			4000-10000

Forging Technique

Heat Temperature			Start Forging Temperature			Finish Forging Temperature			Cooling Method
1150-1200ºC			1130-1180ºC			≥850ºC			Slow Cooling for Φ>50mm

 

Delivery Condition
EAF+LF+VD, Hot Rolled, Forged and Cold Drawn, Black surface or Machined (Peeled, Turned, Grinded),
Untreated or Annealed or Q+T, UT 100% Passed

Characteristics
1. Ultrahigh strength steel with high intensity and toughness.
2. Good harden ability, High fatigue limit and capability of impact resistance after Q+T.
3. No obvious temper brittleness.


Applications
1. For making crucial mechanical parts with high intensity and large sections, such as shaft, gear and connecting rod.
2. For making large and medium size of plastic mold.


What we can offer?
We offer a wide range of steel products in a wide variety of dimensions and executions, acc.to the common international specifications or customerized.
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

	AISI	DIN	JIS	Stock	Application
Hot Work Tool Steel	H11	1.2343	SKD6	√	Die Casting Dies,Extrusion Dies, Hammer Dies, Ram Dies, Forging Dies etc.
	H13	1.2344	SKD61	√
	H10	1.2365	SKD7
	--	1.2367	--
	L6	1.2714 / 1.2713	SKT4	√
	H12	1.2606	SKD62
	H21	1.2581	SKD5	√
Cold Work Tool Steel	D3	1.2080	SKD1	√	Cutting Tools, Punching Tools, Shear Bladers, Reamers, Thread Rolling Dies, Calipers, Sockets etc.
	--	1.2601	~SKD11	√
	D2	1.2379	~SKD11	√
	--	1.2379 MOD	DC53 (Daido)	√
	D6	1.2436	--
	O1	1.2510	SKS3	√
	O2	1.2842	--
	A2	1.2363	SKD12
	S1	1.2550	--
	S7	1.2357	--
	--	1.2767	SKT6
	L2	1.2210	--
Plastic Mould Steel	P20	1.2311	--	√	Mold Base, Core & Cavity, Bumper Mold etc.
	P20+Ni	1.2738	--	√
	P20+S	1.2312	--	√
	--	1.2316	--
	420	1.2083	SUS420J2	√
	--	--	NAK80 (Daido)	√
Alloy Steel	4120	25CrMo4 / 1.7218	SCM420		Shafts, Gears, Drillers, Chains, Bolts, Nuts, Pins, Suds, Keys, Bites, Crankshafts, Connecting Rods, Came, Couplings etc.
	4135	34CrMo4 / 1.7220	SCM435
	4130	34CrMo4 / 1.7220	SCM430	√
	4140	42CrMo4 / 42CrMoS4 / 1.7225	SCM440	√
	4142	41CrMo4 / 1.7223	SCM440
	4145H	--	--
	4330V	--	--
	4340	34CrNiMo6 / 1.6582	SNCM439
	5115	16MnCr5 / 16MnCrS5 / 1.7131
	5120	20MnCr5 / 20MnCrS5 / 1.7147	SMnC420H
	5140	41Cr4 / 41CrS4 / 1.7035	SCr440	√
	8620	21NiCrMo2 / 1.6523	SNCM220
	8640	40NiCrMo2-2 / 1.6546	SNCM240
	--	18CrNiMo7-6 / 17CrNiMo6 / 1.6587	--
	9840	36CrNiMo4 / 1.6511	--
	E71400	41CrAlMo7-10 / 1.8509	SACM1
	--	34CrAlNi7 / 1.8550	--
Bearing Steel	E52100	100Cr6 / 1.3505	SUJ2	√	Bearing, Shafts etc.
	--	100CrMn6 / 1.3520	--
	--	100CrMo7-3 / 1.3536	--
Spring Steel	5155	55Cr3 / 1.7176	SUP9		Springs
	6150	51CrV4 / 1.8159	SUP10
	9261	60CrSi7 / 1.7108	--
Carbon Steel	1010	CK10 / C10E / 1.1121	S10C		Shafts, Chains, Bolts, Nuts, Pins, Suds, Keys, Bites, Came, Couplings etc.
	1020	C22 / 1.0402	S20C	√
	1040	CK40 / C40E / 1.1186	S40C	√
	1045	CK45 / C45E / 1.1191	S45C	√
	1050	CK50 / C50E / 1.1206	S50C	√
	1055	CK55 / C55E / 1.1203	S55C
	1064	CK60 / C60E / 1.1221	S58C
High Speed Tool Steel	M2	1.3343	SKH51	√	Reamer, End-mill, Hob, Cutter, Bite, Drill, Punch, Tap, Brooch etc.
	M7	1.3348	--
	M42	1.3247	SKH59	√
	M35	1.3243	SKH55	√
	T1	1.3355	SKH2
	T15	1.3202	--
	T42	1.3207	SKH57

Note:
1). √ means we have stoc
2). Delivery Condition:
Smelting: EAF+LF+VD (+ESR)
Making: Hot rolled, Cold rolled, Forged, Cold Drawn
Heat Treatment: Untreated, Annealing, N+T, Q+T
Surface: Black, Peeled, Turned, Milled, Grinded, Polished

Q1: What is Ningbo Ningshing Precision Machinery Group Co., Ltd ?
A1: Ningbo Ningshing Precision Machinery Group Co., Ltd., formerly known as Ningbo Ningshing Special-Steel Group Co., Ltd., is the leading distributor of Special Steel, and also a professional mold base maker in China. Our business involves special steel trading, machining processing, mold base making, heat treatment, CNC machines manufacturing.


Q2: Are you a manufacturer or a trader? 
A2: For Special Steel, we are the one of the leading distributors and service center in China. 9 warehouses with over 50,000 tons of regular stock. Our workshop has various kinds of equipments for sawing, milling, grinding, drilling etc.
For mold base, we are a professional manufacturer, with 24 sets of CNC machines, 3 axis and 5 axis, CMM for inspection. We produce medium-large sized mold base for plastic injection mold and die casting die.


Q3: How do you control the quality of steels?
A3: Firstly, we have very close and deep relationship with Chinese Prime Mills, choose supplier carefully, and regard them as the long term business partner. Based on the long term cooperation, we concentrate on special steel business and expand the market step by step. Secondly, we have own technical center which is formed by the experienced engineers and technicians whom ever worked for prime mills. We control the quality in production process, in-out warehouse.


Q4:: Which kind of processing can you do?
A4: We do machining processing like cutting, milling, grinding, turning, peeling, drilling, CNC machining. Meanwhile, we do vacuum heat treatment for die and mold.