4340 quenched & tempered steel round bar from China

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4340 quenched & tempered steel round bar

Payment Type:	L/C,T/T,D/P,Paypal,Money Gram,Western Union
Incoterm:	FOB,CFR,CIF,EXW,FCA,CPT,CIP
Min. Order:	5 Metric Ton
Delivery Time:	30 Days

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Basic Info

Model No.: aisi 4340 / sae 4340 / astm 4340

Type: Other

Standard: AISI, ASTM

Steel Grade: Other

Technique: Hot Rolled

Application: Structural Steel Bar

Surface Treatment: Other

Alloy: Alloy

Special Use: Mold Steel

STEEL GRADE: Aisi 4340 / Sae 4340 / Astm 4340

Additional Info

Packaging: Anti-rusty standard seaworthy

Productivity: 3000 tons per month

Brand: LE REN

Transportation: Ocean,Land

Place of Origin: Shandong Provnce, China

Supply Ability: 3000 tons per month

Certificate: ISO 9001

HS Code: 7228309000

Port: Qingdao Port

Product Description

4340 quenched & tempered steel round bar

aisi4340 steel is one kind of nickel chromium molybdenum alloy steel know for it's toughness and ti's ability to attach high strength after heat treatment.

Quenching and Tempering, abbreviated as Q&T is a king of processing that strengthen or harden steel bars by heating the materials and then cooling in water, oil or other liquid medium, that rapidly the change from austenite to perlite to get the proper properties for various usage. The quenched & tempered steel bar materials are usually with carbon from 0.30% - 0.60%, it is widely used as merchant bars in components of various machines.

4340 material quenched and tempered q&t steel bar we supply includes following advangtages:

Consistent mechanical properties

Deep mechanical properties (from surface to the center according to your requirement)

Even hardness on the whole bars/Tougher and Increased strength

No brittle, UT testing/Precision size tolerance/Good straightness

Good Roughness/Professional technical service/Competitive price/Fast delivery

Specification of 4340 material quenched and tempered q&t steel bar we supply:

1. 4340 steel equivalent material:

GB	JIS	ASTM/AISI/SAE
40CrNiMo(A)	SNCM439	4340

5. Chemical composition:

	C	SI	MN	S	P	Cr	Mo	Ni
40CrNiMo(A)	0.37-0.44	0.17-0.37	0.50-0.80	0.035 (max)	0.035 (max)	0.60-0.90	0.15-0.25	1.25-1.65
SNCM439	0.36-0.43	0.15-0.35	0.60-0.90	0.030 (max)	0.030 (max)	0.60-1.00	0.15-0.35	1.65-2.00
aisi 4340	0.38-0.43	0.15-0.35	0.60-0.80	0.035 (max)	0.035 (max)	0.70-0.90	0.20-0.30	1.65-2.00

6. 4340 Mechanical Properties:

Yield Strength(MPa)	Tensile Strength(MPa)	Elongation(%)	AKV
835(min)	985(min)	12(min)	55(min)

Note: The mechanical properties can be adjusted according to heat treatment based on your requirement.

4. 4340 steel applications:

aisi4340 steel can be used to produce commercial and aircraft, automobile systems, forged hydraulic and other machine tools like forged steel crankshafts

5. Production line:

QT bar

6. Production Facilities:

heat treatment

7. Inspection:

Inspection

8. Package:

mmexport1552531948252

9. RFQ:

Q1. Are you a manufactuer?
A1:Yes, we have our own factory and labatory to produce and inspect products.

Q2. How to ensure that every process's quality?

A2:Every process will be checked by our quality inspection department which insures every product's quality. we will personally go to tIn the production of products,he factory to check the quality of products.

Q3.How long is your delivery time?
A3:Our delivery time is generally 30 to 45 days. Or according to the quantity.

Q4. What is your payment method?
A4:30% value of T/T in advance and other 70% balance on B/L copy.
Q5.Can you provide a sample?
A5:Sure, Our sample is provided free of charge, but not including courier fees

4340 Steel Properties 4340 Steel Round Bar 4340 Heat Treat

prevSCM440 Q&T alloy steel round bar

nextsncm439 quenched & tempered steel round bar

Note: The mechanical properties can be adjusted according to heat treatment based on your requirement.

4. 4340 steel applications:

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