Used for Manufacturing Rolling Bearing 1.3555 13mocrni42-16-14 G13cr4mo4ni4V B20443 Alloy Steel Round Steel

• Type: Alloy Steel
• 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.: 1.3555 13MoCrNi42-16-14 G13Cr4Mo4Ni4V B20443
• 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

Product Description

Bearing steel is used to make balls, rollers and bearing rings. Bearing steel has high and uniform hardness, wear resistance and high elastic limit. The requirements for the uniformity of chemical composition, the content and distribution of non-metallic inclusions, and the distribution of carbides of bearing steel are very strict. It is one of the most stringent steel grades in all steel production. In 1976, the International Organization for Standardization (ISO) incorporated some general bearing steel grades into the international standards, and divided the bearing steel into four types, namely, fully hardened bearing steel, surface hardened bearing steel, stainless bearing steel, and high temperature bearing steel, with 17 steel grades.

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
18Mn5 1.0436	0.15-0.20	≤0.40	0.90-1.60	≤0.30	≤0.30	≤0.08	≤0.025	≤0.015	≤0.30
SCMn2/SMn433/1330/1527/Gr.1330/ 28Mn6/1.1165/30Mn5/1.1170	0.27-034	0.17-0.37	1.40-1.80	≤0.30	≤0.30	≤0.10	≤0.030	≤0.030	≤0.30
35Mn2/SMn433/SMn438/1335/36Mn6/ 36Mn5/1.1167	0.32-0.39	0.17-0.37	1.4-1.8	≤0.30	≤0.30	≤0.15	≤0.035	≤0.035	≤0.15
40Mn2/SMn438/SMn438/ SMn443/1340/42Mn6/1.1055	0.37-0.44	0.17-0.37	1.4-1.8	≤0.30	≤0.30	≤0.15	≤0..35	≤0.035	≤0.30
45Mn2/SMn443/SMn443/ 1345/46Mn7/1.0912	0.42-0.49	0.17-0.37	1.4-1.8	≤0.30	≤0.30	≤0.15	≤0.035	≤0.035	≤0.30
50Mn2/50Mn7/1.0913	0.47-0.55	0.17-0.37	1.4-1.8	≤0.3	≤0.3	≤0.15	≤0.035	≤0.035	≤0.15

feature

1) High contact fatigue strength,
2) After heat treatment, it shall have a high hardness or a hardness that can meet the performance requirements of the bearing,
3) High wear resistance, low friction coefficient,
4) High elastic limit,
5) Good impact toughness and fracture toughness,
6) Good dimensional stability,
7) Good anti-rust performance,
8) Good cold and hot working performance.

The physical properties of bearing steel mainly include the inspection of microstructure, decarburized layer, non-metallic inclusion and macrostructure. Generally, they are delivered by hot rolling annealing and cold drawing annealing. The delivery status shall be indicated in the contract. The macrostructure of steel must be free of shrinkage, subcutaneous bubbles, white spots and micro-pores. Central porosity and general porosity shall not exceed grade 1.5, and segregation shall not exceed grade 2. The annealing structure of steel shall be fine pearlite with uniform distribution. The depth of decarburization layer and the inhomogeneity of non-metallic inclusions and carbides shall comply with relevant national standards.

Product Parameters

Item	Hard Chromed Rod	Induction Hardened Chromed	Nickel and Chrome Plating Bars
Tolerance	ISOf7	ISOf7	ISOf7
Roundness	Diameter tolerance / 2	diameter tolerance / 2	diameter tolerance / 2
Standard Length	-for Ø ≤ 60 mm: 5600 -6200mm -for Ø≥60 mm: 5800 -7200mm  Upon request: special lengths on all diameters	- for Ø ≤ 60 mm: 5600 - 6200 mm - for Ø ≥ 60 mm: 5800 - 7200mm  Upon request: special lengths on all diameters	Up to 6000 mm  Upon request: special lengths on all diameters
Surface Roughness	Ra max. 0.20 µm  (statistic average: 0.05-0.15 µm)	Ra max. 0.20 µm  (statistic average: 0.05- 0.15 µm)	Ra max. 0.20 µm (statistic average: 0.05-0.15 µm)
Chrome Layer Thickness	min. 900 HV (0.1)	min. 900 HV (0.1)	min. 25 µm
Straightness	≤ Ø16 mm: max. 0.3 mm: 1000 mm > Ø16 mm: max. 0.2 mm: 1000 mm	≤ Ø16 mm: max. 0.3 mm: 1000 mm > Ø16 mm: max. 0.2 mm: 1000 mm	max.0.20 mm/1000 mm

 

 

heat treatment

(1) 50 ton and above UHP electric furnace smelting → 60 ton and above LF furnace refining → 60 ton and above VD furnace vacuum treatment → alloy steel billet or rectangular billet continuous casting (260mm × 300mm,180mm × 220mm) → slow cooling or hot delivery → rolling → finishing → inspection and warehousing.
(2) 90t and above converter smelting → 100t and above LF refining → 100t and above RH furnace vacuum treatment → alloy steel billet or rectangular billet continuous casting → (e.g. 320mm × 340mm,240mm × 240mm) slow cooling or hot delivery → rolling → finishing → inspection and warehousing

Application

Bearing steel is a kind of steel used to manufacture ball, roller and sleeve of rolling bearings, as well as precision measuring tools, cold stamping dies, machine tool lead screws, such as stamping dies, measuring tools, screw taps and precision accessories of diesel engine oil pumps. Bearing steel is used to make balls, rollers and bearing rings.

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