Alloy Steel Round Bar (42CrMo, SCM440, 4140, 42CrMo4)

• Standard: DIN, JIS, AISI, ASTM, GB, BS
• Technics: Forged
• Application: Tool Steel Bar
• Model NO.: Alloy Steel Round Bar SCM440, 4140, 42CrMo4)
• Surface: Polished
• Alloy: Alloy
• Special Use: High-strength Steel Plate, Wear Resistant Steel, Silicon Steel, Cold Heading Steel, Free Cutting Steel, Mold Steel
• Heat Treatment: Annealed
• Length: 3000-5800mm
• Non-Metallic Inclusiton: ASTM E45
• Grain Size: ASTM E112
• Process: Eaf+Lf+Vd+Forged+Heat Treatment(Optional)
• Technology: Hot Rolled/ Forged/ Cold Drawn
• Usage: Automotive, Aerospace, Power Generation, Oil & Gas
• Ex-Stock: Yes
• Service: 24 Hours on Line
• Other Type: Engineering Steel, Cold Work Tool Steel
• Test: Ensile Strength, Yield Strength, Elongation
• Other Type 1: Engineering Steel, Cold Work Tool Steel
• Other Type 2: Hot Work Tool Steel, Plastic Mold Steel
• Other Type 3: Spring Steel, High Speed Steel, Stainless Steel
• Other Type 4: Mold Steel, Free Cutting Steel, Cold Heading Steel
• Transport Package: Seaworthy Package
• Specification: DIA 60-600
• Trademark: zayi
• Origin: China
• HS Code: 72284000
• Production Capacity: 48000tons/Month

Product Description

Product Description

Alloy Steel Round Bar (42CrMo, SCM440, 4140, 42CrMo4)1: 42crmo4 steel introduction

42crmo4  is a common chromium-molybdenum steel that usually used after quenched and tempered, with high intensity, high hardenability. BS EN 42CrMo4 round steel has better performance than 34CrMo4 steel due to the carbon and chromium content is higher. 42CrMo4 alloy steel has higher strength and hardenability. The 42CrMo4 alloy material also has high fatigue strength and good low-temperature impact toughness. The temper brittleness is not obvious.
 
2: 42crmo4 Steel equivalent

EN 10250	Material No.	DIN	ASTM A29	JIS G4105	BS 970-3-1991	BS 970-1955	AS 1444	AFNOR
42CrMo4	1.7225	38HM	4140	SCM440	708M40	EN19A	4140	42CD4

 
3: D2 steel chemical composition

42CrMo4/1.7225	C	Mn	Si	P	S	Cr	Mo
	0.38-0.45	0.60-0.90	0.40 max	0.035 max	0.035 max	0.90-1.20	0.15-0.30

 
4: D2 steel mechanical properties  

Size Ø mm	Yield stress Rp0.2,N/nn2, min.			Ultimate tensile Stress, Rm,N/nn2				Elongation A5,%, min.				Hardness HB		Toughness KV, Joule, min.
<40	750			1000-1200				11				295-355		35 at 20ºC
40-95	650			900-1100				12				265-325		35 at 20ºC
>95	550			800-950

5: D2 steel overviews

Size	Round	Dia 10-200mm
	Flat bar/plate	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
Trade terms	FOB; CIF; CFR
Delivery time	7-15 days
Application	D2 used for Blanking Dies, Forming Dies, Coining Dies, Slitting Cutters, Heading Tools, Long Punches, Forming Rolls, Edging Rolls, Master Tools, Beading Rolls, Intricate Punches, Extrusion Dies, Drawing Dies, Lamination Dies, Thread Rolling Dies, Shear Blades, Burnishing Tools, Gauges, Knurls, Wear Parts.

 
7:FAQ of 42CrMo4 Steel:

a.Quenched and Tempered (Q+T)

• Heat 42CrMo4 steel slowly to 880°C;
• Soak at this temperature then quench in oil;
• Temper as soon as 42CrMo4 steel reach room temperature (20°C);
• Heat uniformly to the suitable temperature of 560°C;
• Withdraw the 42CrMo4 material from the furnace and cool in the air.

b. Forging of 42CrMo4 Alloy Steel

• Preheat 42CrMo4 engineering steel uniformly and slowly;
• Increase the forging temperature up to 1150-1200°C.
• Always keep the forging temperature above at least 850°C

c.Weldability

Engineering steel 42CrMo4 has only limited weldability. Preheating to 200-300°C is strongly recommended; the upper limit should not be exceeded because of risk for deterioration of the chrome layer.

Alloy steel 42CrMo4 can be friction welded. However, precautions are necessary so as to limit the formation of undesirable microstructures in the welded zone.

d.Application of 42CrMo4 Alloy Steels

EN 42CrMo4 alloy steel is widely used for engineering steel purpose, such as: making various kinds of machinery, automobile, mining spare part, the gearwheel of the engine, the driving gear of supercharger, the connecting rob, the pinchock under the high pressure, parts for power train applications, cold formed fastener components, shafts, gears, drill collars for the oil exploration, etc.

FAQ

Q: Where is your company ?

A: Our company located in liaocheng , shandong provice of China.

Q: Are you trading company or manufacturer?
A: we are manufacturer.

Q: How long is your delivery time?
A: Generally is 7-10 working days of goods in stock, or 20-30 days if goods are not in stock, it is according to quantitiy.

Q: Do you provide samples? is it free or extra?
A: Yes, we could offer the sample for free charge.but the customers have to pay the sample courier cost.

Q:. What kind of terms of payment?
A: T/T, L/C,Western Union Alipay,Cash are available.

Q: What is your terms of payment?
A: T/T 30% as deposit, and 70% before delivery. We'll show you the photos of the products and packages before you pay the balance.

Q. What is your terms of delivery?
A: EXW, FOB, CFR, CIF.

Q. Do you test all your goods before delivery?
A: Yes, we have 100% test before delivery

Q: How do you make our business long-term and good relationship?
A:1. We keep good quality and competitive price to ensure our customers benefit ;
2. We respect every customer as our friend and we sincerely do business and make friends with them, no matter where they come from.