Alloy Structural Steel DIN 34CrNiMo6 JIS Sncm447 4340 1.6582 4140 5120 Hot Rolled Cold Drawn Forged Round Bar

• Type: Alloy Steel Bar
• Standard: AISI, ASTM, GB, JIS, DIN, BS
• Technique: Hot Rolled
• Application: Structural Steel Bar, Tool Steel Bar, Die Steel Bar
• Surface Treatment: Black/Peeling/Polishing/Machining/Grinding/Turning
• Alloy: Alloy
• Model NO.: 34CrNiMo6 SNCM447 4340 1.6582 4140 5120
• Special Use: Mold Steel
• Transport Package: Standard Packaging or Customized
• Specification: 100-12000mm
• Trademark: meide
• Origin: Shandong, China
• HS Code: 72141000
• Production Capacity: 1000 Ton/Month

Product Description

Introduction

Low alloy high strength steel is a kind of engineering structural steel developed by adding a small amount of Mn, Si, Nb, V, Ti, Al and other alloy elements on the basis of carbon structural steel. The so-called low alloy means that the total amount of alloy elements in steel does not exceed 3%. High strength is relative to carbon engineering structural steel. The development principle of low alloy high strength steel is to use as few alloying elements as possible to obtain as high comprehensive mechanical properties as possible, so as to meet the purpose of use and low cost. Low alloy high-strength steel can meet the requirements of large bearing capacity of various structures (such as large bridges, pressure vessels, ships, etc.) in engineering, and at the same time, it is required to reduce the dead weight of structures, improve reliability, and save materials and resources. This kind of steel is mainly used to manufacture various engineering structures with high strength requirements, such as bridges, ships, vehicles, high pressure vessels, oil and gas pipelines, large steel structures, etc. Because this kind of steel can obtain high strength without complex treatment process or even heat treatment, which greatly reduces the quality of engineering structures, it is used to replace general carbon structural steel.

chemical composition

component	C	Si	Mn	P	S	Cr	Ni	Mo
minimum value	0.3	0.17	0.4	-	-	1.4	1.4	0.15
Maximum  value	0.38	0.37	0.7	0.035	0.035	1.7	1.7	0.3

Approximate comparison table

GB	JIS	ASTM	ISO	DIN EN/DIN	NF EN/NF	EN	Digital grade	GOST	SS
34CrNi3Mo  34CrNiMo  ZG34CrNiMo	SNCM447	4340	36CrNiMo6	34CrNiMo6  GS-34CrNiMo6V	35NCD6	34CrNiMo6	1.6582	36KH2N2MFA  38KH2N2MA  40KHN2MA	2541

 

 

Product Parameters

Carbon steel

A283GR.C/GR.D, ASTMA36, A573GR.58, A573GR.65, A573GR.70. SS400, SM400A, SM400B. SM400C, S235JR, S235J0, S235J2, S275JR, S275J0, S275J2, S275N, S275NL, S275M, S275ML, 250, 250L0, 250L15, Q235A/B/C/D, Q275A/B/C/D,

Low Alloy steel

A572GR.50, A572GR.60, SS490, SM490N/NL, S460N/NL, S355M/ML, S420M/ML, S460M/ML, S500Q/QL/QL1, S550Q/QL/QL1,S620Q/QL/QL1, S690Q/QL/QL1, S355G8+N, 350, 350L0, 350L15, Q345A, Q345B, Q345C, Q345D, Q345E, Q390A, Q390B, Q390C, Q390D, Q390E, Q420A, Q420B, Q420C, Q420D, Q420E, Q460C, Q460D, Q460E, Q500C, Q500D, Q500E, Q550C, Q550D, Q550E, Q20C, Q620D, Q620E, Q690C, Q690D, Q690E, 890D, Q890E,Q960D, Q960E, XGCFQ500D, XGCFQ500E.

Product specification

Product name	Specification/mm	material quality
Cold drawn light circle	Ф3.0-100	34CrNiMo6
Hot-rolled steel plate	5-100	34CrNiMo6
Hot rolled round steel	Ф100-200	34CrNiMo6
Hot rolled round steel	Ф20-100	34CrNiMo6
Hot rolled round steel	Ф200-400	34CrNiMo6

Mechanical properties

34CrNiMo6 material has a hardness of 36 ~ 40HRC and tensile strength after quenching and tempering σ B is 1100 MPa, elongation δ 12%, impact toughness value ακ 8kg/cm2

Heat treatment:
The quenching and tempering process of 34CrNiMo6 is 850 oil quenching and 580 degree tempering

Classification:
1.Quenched and tempered structural steel
The carbon content of quenched and tempered steel is generally about 0.25%~0.55%. For structural parts with a given section size, if they are quenched along the section during quenching and tempering treatment (quenching and tempering), the mechanical properties are good. If they are not quenched, and there is free ferrite in the microstructure, the toughness decreases. Steel with temper brittleness tendency, such as manganese steel, chromium steel, nickel-chromium steel, etc., shall be cooled quickly after tempering. The quenching critical diameter of such steels increases with the increase of grain size and alloying element content. For example, 40cr and 35simn steels are about 30-40mm, while 40crnimo and 30crni2mov steels are about 60-100mm. They are commonly used to manufacture structural parts such as shafts and connecting rods that bear large loads.

2. Case-hardened structural steel
Surface hardened structural steel is used to manufacture parts with hard and wear-resistant surface and flexible core, such as gears, shafts, etc. In order to improve the toughness of the part center, the carbon content in the steel should be low, generally 0.12-0.25%, and there should be an appropriate amount of alloy elements to ensure the appropriate hardenability. Nitriding steel also needs to add alloy elements (such as al, cr, mo, etc.) that are easy to form nitrides. Carburized or carbonitriding steel, after carburizing or carbonitriding at 850~950 ºC, is quenched and used at low temperature tempering (about 200 ºC). After nitriding treatment (480~580 ºC), nitrided steel can be used directly without quenching and tempering treatment.

FAQ

1. Who are we?
Our headquarter is located in Shandong, China. Since 2022, we have sold to North America (60.00%), Western Europe (14.00%) and South America (6.00%). There are about 11-50 people in our office.

2. How do we guarantee quality?
Always provide pre-production samples before mass production;
Always carry out final inspection before shipment;

3. What can you buy from us?
Copper, aluminum, die steel, titanium, customized machine parts
4. Why should you buy from us instead of other suppliers?
The company has 25 years of production experience. It has advanced precision production equipment, modern large warehouse, 200000 tons of inventory goods and a number of long-term stable cooperative customers.

5. What services can we provide?
Accepted delivery conditions: FOB, CFR, CIF, EXW
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Accepted payment type: T/T, L/C, D/P D/A, PayPal;
Optional ports: Tianjin, Shanghai, Guangzhou;
Spoken: English, Chinese

6. How can we get your price?
A. We need the following information to quote for you:
1).  Product Name
2).  standard
3).  Material grade (chemical composition)
4).  dimension
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