China Wholesale 20cr/A20202/20X/SCR420 /5120 /20cr4 /40cr Chrome Carbon Steel Round Alloy Steel Bars/Rod Price Per Kg

• Type: Alloy Steel Bar
• Standard: AISI, ASTM, GB, JIS, DIN, BS
• Technique: Hot Rolled
• Application: Structural Steel Bar, Tool Steel Bar, Die Steel Bar
• Alloy: Alloy
• Special Use: Mold Steel
• Model NO.: 20Cr/A20202/20X/SCr420 /5120 /20Cr4 /40cr
• 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

In addition to iron and carbon, other alloy elements are added to alloy steel, which is called alloy steel. An iron-carbon alloy formed by adding an appropriate amount of one or more alloying elements on the basis of ordinary carbon steel. According to the different added elements and adopting appropriate processing technology, special properties such as high strength, high toughness, wear resistance, corrosion resistance, low temperature resistance, high temperature resistance and non-magnetism can be obtained.

chemical composition

Grade	C	Si	Mn	Cr	Ni	Mo	P	S	Cu
							≤
20Mn2	0.17-0.24	0.17-0.37	1.40-1.80	≤0.30	≤0.30	≤0.10	0.030	0.030	0.30
SMn420	0.17-0.23	0.15-0.35	1.20-1.50	≤0.35	≤0.25		0.030	0.030	0.30
1524	0.19-0.25	0.15-0.30	1.35-1.65	-	-		0.040	0.050	0.20
22Mn6	0.18-0.25	0.10-0.40	1.30-1.65	≤0.40	≤0.40	≤0.10	0.025	0.035	0.30
20SiMn2MoV	0.17-0.23	0.90-1.20	2.20-2.60	≤0.30	≤0.30	0.30-0.40	0.030	0.030	0.30
15Cr	0.12-0.17	0.17-0.37	0.40-0.70	0.70-1.00	≤0.30	≤0.10	0.030	0.030	0.30
15X	0.12-0.18	0.17-0.37	0.40-0.70	0.70-1.00	≤0.30	-	0.035	0.035	0.30
SCr415	0.13-0.18	0.15-0.35	0.60-0.90	0.90-1.20	≤0.25	-	0.030	0.030	0.30
5115	0.13-0.18	0.15-0.35	0.70-0.90	0.70-0.90	-	-	0.040	0.040	-
17Cr3	0.14-0.20	0.15-0.40	0.60-0.90	0.70-1.00	-	-	0.025	0.035	0.40
1.7016	0.14-0.20	≤0.30	0.60-0.90	0.70-1.00		-	0.025	0.025	0.25
20Cr	0.18-0.24	0.17-0.37	0.50-.080	0.70-1.00	≤0.30	≤0.10	0.030	0.030	0.30
20X	0.17-0.23	0.17-0.37	0.50-0.80	0.70-1.00	≤0.30		0.035	0.035	0.30
SCr420	0.18-0.23	0.15-0.35	0.60-0.90	0.90-1.20	≤0.25		0.030	0.030	0.30
5120	0.17-0.22	0.15-0.35	0.70-0.90	0.70-0.90			0.040	0.040	-
20Cr4	0.17-0.23	0.15-0.40	0.60-0.90	0.90-1.20			0.025	0.035	0.40

Approximate comparison table

GB

ISC

JIS

ASTM/AISI

UNS

ISO

DIN EN/DIN

W-Nr.

NF EN/NF

EN

Digital brand

GOST

BS EN/BS

30Mn2

A00302

SMn433

1330

G13300

28Mn6

30Mn5

1.1165

32M5

28Mn6

1.1170

30Г2

150M28

 

Product Description

Material Science:	Hot rolled/cold drawn/forged steel round steel
Process:	It is forged from vacuum degassed steel ingot.
Diameter:	25mm - 1000mm (optional)
Length:	1000mm-12000mm Straightness:3mm/M max(optional)
Process:	EAF+LF+VD+forging+heat treatment (optional)
Delivery conditions:	Hot forging+rough machining (black surface after Q/T)+double tempering.
Delivery time	15-25 days
Minimum order quantity:	5 tons
Heat treatment:	Normalizing/annealing/quenching/tempering (optional)
Technical data:	Chemical composition, physical properties and mechanical tests according to customer requirements
characteristic:	According to your requirements
Test:	Ultrasonic test according to SEP 1921-84 C/c and D/d (optional)
Tag:	Grade, heat resistant NO The length will be printed with the required color on each bar
Payment:	T T 30% in advance; The balance shall be paid against shipping documents or irrevocable letter of credit at sight before shipment
Terms of trade	FOB,C&F,EXW...

Mechanical properties

Sample diameter  d mm	Heat treatment or condition	tensile strength σb Mpa	Yield point σs Mpa	Elongation δ %	hardness HBW	Impact absorbed energy KV2 J	Reduction of area  ψ  %
d=25	Quenching+tempering	≥835	≥540	≥10	≥40	≤179	≥47

 

Application

15Cr/1.7015/15Cr3/ 5115/G51150/ SCr415	It is used to manufacture various carburized parts with high surface wear resistance, high core strength and toughness, high working speed, but section size below 30mm, such as crank pin, piston pin, piston ring, coupling, small camshaft, pinion, slide valve, piston, bushing, bearing ring, screw, rivet, etc. It can also be used as quenched steel, manufacturing small parts with certain strength and toughness, but wide deformation requirements
20Cr/A20202/20X/SCr420/5120 l/20Cr4	It is used to manufacture various carburized or carbonitriding parts with small section (less than 30mm), simple shape, high speed, small load, surface wear resistance and high core strength, such as pinion, pinion, valve, piston pin, bushing ratchet, tray, cam, worm, tooth clutch, etc. For parts with small heat treatment deformation and high wear resistance requirements, general quenching or high-frequency quenching shall be carried out after carburizing, such as small module (less than 3mm) gear Spline shaft, shaft, etc. can also be used as quenched and tempered steel for manufacturing parts with low speed and medium load (impact)
30Cr/A20302/30X/SCr430 /5130/28Cr4/1.7033	It is used to manufacture various wear-resistant or impacted parts, such as gears, rollers, shafts, levers, rocker rods, connecting rods, bolts, nuts, etc. It can also be used as high-frequency surface hardening steel to manufacture wear-resistant and high-hardness parts
35Cr/A20352/35X/SCr435/5135/37Cr4/1.7034	It is used for manufacturing gears, shafts, rollers, bolts and other important quenched and tempered parts, and its use is basically the same as that of 30Cr
1.7035 40Cr 41Cr4 5140 42C4 SCR440(H)	One of the most widely used steel grades of Zui is used to manufacture medium-speed and medium-load parts after quenching and tempering, such as machine tool gears, shafts, worms, spline shafts, thimble sleeves, etc. After quenching and tempering and high-frequency surface quenching, it is used to manufacture parts with high surface hardness and wear resistance, such as gears, shafts, spindles, crankshafts, mandrels, sleeves, pins, connecting rods, screws, nuts, inlet valves, etc. After quenching and medium-temperature tempering, it is used to manufacture parts with heavy load and medium-speed impact, Such as oil pump rotor, sliding block, gear, main shaft, collar, etc., after quenching and low temperature tempering, it is used to manufacture heavy load, low impact, wear-resistant parts, such as worm, main shaft, shaft, collar, etc., after carbonitriding treatment Make transmission parts with large size and high low-temperature impact toughness, such as shafts and gears. The 40Cr substitute steels include 40MnB, 45MnB, 35SiNn, 42SiMn, 40MnVB, 42MnV, 40MnMoB, 40MnWB, etc
SCr4455145/45Cr/A20452/45X	Similar to the use of 40Cr, it is mainly used for manufacturing high-frequency surface hardened shafts, gears, sleeves, pins, etc
50Cr/A20502/5150/5150/G51500	It is used to manufacture heavy and wear-resistant parts, such as hot-rolled rolls, transmission shafts, gears, thrust rings below 600mm, mandrels of backup rolls, connecting rods and tappets of diesel engines, tractor clutches and bolts, wear-resistant and high-strength oil film bearing sleeves and gears in heavy mining machinery, as well as high-frequency surface-hardened parts, moderately elastic springs, etc

Heat treatment

 

Heat treatment is an extremely effective measure to improve and modify the properties of 15CrMo alloy round steel, which plays a very important role in the reliability and economy of products. The heat treatment of 15CrMo alloy round steel usually includes ordinary heat treatment (annealing, normalizing, quenching, tempering) and surface heat treatment (surface quenching and chemical heat treatment - carburizing, nitriding, metallizing, etc.). In mechanical engineering, many machine parts, such as crankshafts, gears, camshafts of internal combustion engines and gears in important reducers, require not only sufficient toughness, plasticity and bending strength at the center, but also high hardness, high wear resistance and high fatigue strength within a certain thickness of the surface. The above-mentioned overall heat treatment methods are difficult to meet the above performance requirements at the same time, and surface heat treatment is the most effective method to meet these performance requirements at the same time.
Surface heat treatment is a heat treatment method to change the surface properties by changing the structure of the surface layer of 15CrMo alloy round steel.
Surface quenching - heat treatment that only changes the structure of the surface layer without changing the chemical composition of the surface layer. It can be realized by high frequency, medium frequency or power frequency current induction heating or flame heating. Its common feature is to try to make the surface of 15CrMo alloy round steel rapidly heated to the quenching temperature. When the heat has not yet been transferred to the center of the part, it will immediately cool down, so that the surface hardness is high, while the center still has high toughness. Chemical treatment - a heat treatment method that changes the chemical composition and structure of the surface layer of 15CrMo alloy round steel. Chemical heat treatment can be divided into carburizing, nitriding, carbonitriding, metallizing and other methods according to the different elements infiltrated into the surface of 15CrMo alloy round steel. It is very effective to improve the wear resistance, corrosion resistance and fatigue resistance of 15CrMo alloy round steel. At present, chemical heat treatment has developed rapidly and new technologies have been widely used.

Packaging	1. by bundles, each bundle weight under 3 tons, for small outer diameter steel bars, each bundle with 4 - 8 steel strips.  2. after making by bundle, covered with Polyethylene waterproof cloth. 3. make black paints painting on each bar, then make bundles
20 feet container contains dimension	Length under 6000mm
40 feet container contains dimension	Length under 12000mm
By bulk vessel	Freight charge is low by bulk cargo, and large heavy sizes can not be loaded into containers can shipping by bulk cargo

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
Accepted payment currency: US dollar, Euro, Japanese yen, Canadian dollar, Australian dollar, Hong Kong dollar, British pound, RMB, Swiss franc;
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
5).  amount
6).  Special part drawing