Scm440 42CrMo4 SAE AISI 4140 En19 1.7225 High Tensile Hot Rolled Steel Round Bar Steel Bar

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Scm440 42CrMo4 SAE AISI 4140 En19 1.7225 High Tensile Hot Rolled Steel Round Bar Steel Bar

Customization:	Available
Warranty:	24 Months
Type:	Alloy Steel Bar

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Product Description

Basic Specifications

Model NO.

Hot Rolled Steel Round Bar

Standard

AISI, ASTM, GB, JIS, DIN, BS

Technique

Hot Rolled

Application

Structural Steel Bar

Surface Treatment

Black

Alloy

Grade

En19 42CrMo, 4140. Scm440

Length

6m or as Required

MOQ

2tons

Condition

Hot Rolled /Forged /Cold Drawn/Q&T

Types

Alloy Steel

Transport Package

by Bundles 2-4tons

Specification

M12-M310

Origin

China

HS Code

72283090

Production Capacity

3000tons/Month

Product Description

SCM440 42CrMo4 SAE AISI 4140 EN19 1.7225 High Tensile Steel Bar

EN19 AISI 4140 42CrMo4 is an alloy structural steel used for engineering structures such as high tensile shafts, bolts and nuts, gears, pinions, and spindles. It is also suitable for locomotive traction big gears, supercharger drive gears, pressure vessels, rear axles, connecting rods, and spring clips.

1. Supply Size Range

●Hot Rolled steel bar: Ø16mm-310mm

●Forging steel bar: Ø260mm-1000mm

●Q&T (Quenched & Tempered): Ø16-1000mm

●Cold drawn bright steel bars: 5mm to 120mm

2. Equivalent Grades

GB,YB	JIS	DIN(W-Nr.)	AISI/SAE	BS	NF
42CrMo	SCM440/(SCM4)	42CrMo4-1.7225	4140	708M40/709M40/EN19	42CD4

3. Chemical Composition (%)

Standard	C	Si	Mn	Cr	Mo	P	S
4140 (ASTM)	0.38~0.43	0.15~0.35	0.75~1.00	0.80~1.10	0.15~0.25	≤0.035	≤0.040
1.7225 (DIN)	0.38~0.45	≤0.40	0.60~0.90	0.90~1.20	0.15~0.30	≤0.035	≤0.035
42CrMo (GB)	0.38~0.45	0.17~0.37	0.50~0.80	0.90~1.20	0.15~0.25	≤0.030	≤0.030
708M40 (BS)	0.36~0.44	0.10~0.35	0.70~1.00	0.90~1.20	0.15~0.25	≤0.035	≤0.035
SCM440 (JIS)	0.38~0.43	0.15~0.35	0.60~0.85	0.90~1.20	0.15~0.30	≤0.030	≤0.030

4. Heat Treatment

4140 alloy steel is a high-quality Quenched and Tempered Alloy Structural steel. Oil Quenched & Tempered Hardness is 28-34 HRC. Annealing delivery hardness is less than 250HB.

◈Annealing: Annealed at 872°C (1600°F) followed by slow furnace cooling.

◈Tempering: Tempered at 205 to 649°C (400 to 1200°F). Lower temperatures result in higher hardness.

◈Hardening: Can be hardened by cold working, or heating and quenching.

5. Packing and Delivery

Packing Details: 1. One bundle includes one heat no. and one size only. 2. Bundle weight: 2 tons to 4 tons. 3. 3-4 metal straps per bundle for secure loading. 4. Identification labels showing heat number, size, quantity, and weight.
	Delivery Method: 1. Shipment via 20' container, 40' container, or bulk vessel. 2. 20' container: max 27 tons (max length 6000mm). 3. 40' container: max 28.5 tons (max length 12000mm). 4. Bulk vessels have no weight or length limits.

Terms & Conditions

MOQ: One bundle (approx. 2-4 tons)

Delivery Time: 7-10 days for stock; 30 days for new production.

Price Terms: EXW, FOB, CFR, CIF

Payment Terms: By TT or LC

Frequently Asked Questions (FAQ)

Q1: What are the primary applications for EN19/AISI 4140 steel? A1: It is widely used for high tensile engineering components such as shafts, bolts, nuts, gears, pinions, spindles, and locomotive traction gears.

Q2: What is the available size range for hot rolled steel bars? A2: Our hot rolled EN19 steel bars are available in diameters ranging from Ø16mm to Ø310mm. Forging bars can reach up to Ø1000mm.

Q3: What is the typical hardness of 4140 steel after quenching and tempering? A3: The typical Oil Quenched & Tempered hardness for 4140 alloy steel ranges between 28-34 HRC.

Q4: What is the minimum order quantity (MOQ) and delivery time? A4: The MOQ is one bundle (approx. 2-4 tons). Stock items can be delivered within 7-10 days, while new production takes about 30 days.

Q5: How is the steel packaged for sea transport? A5: Steel bars are packed in bundles of 2-4 tons, secured with 3-4 metal straps, and labeled with heat numbers, size, and weight for identification.

Q6: What are the equivalent international grades for 42CrMo? A6: Equivalent grades include AISI 4140 (USA), SCM440 (Japan), 1.7225/42CrMo4 (Germany), and EN19 (UK).