Carburizing Seamless Type Automotive Steel Tubes ASTM A534 Grade B20 B21

MOQ： 1 ton
Price： Negotiable
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Payment Terms	L/C, T/T
Delivery Time	60-90days
Packaging Details	In export packaging
Brand Name	Torich
Place of Origin	China
Model Number	ASTM A534
Certification	ISO 9001 ISO14001

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Product Specification


Payment Terms	L/C, T/T	Delivery Time	60-90days
Packaging Details	In export packaging	Brand Name	Torich
Place of Origin	China	Model Number	ASTM A534
Certification	ISO 9001 ISO14001
High Light	low carbon steel tube ，low carbon steel pipe

Carburizing Seamless Type Automotive Steel Tubes ASTM A534 Grade B20 B21

Carburizing Steels for Anti-Friction Bearings

Size:OD 4-520mm WT 0.5-50mm L:3-6m

Application:Bear

Chemical Composition
Number C	Name	C	Mn	P (max)	S (max)	Si	Cr	Ni	Mo	Cu (max)	O (max)D	Al (max)
. . .	4118H	0.17 -0.23	0.60 -1.00	0.025	0.015	0.15 -0.35	0.30 -0.70	. . .	0.08 -0.15	0.3	0.002	0.05
. . .	4320H	0.17 -0.23	0.40 -0.70	0.025	0.015	0.15 -0.35	0.35 -0.65	1.55 -2.00	0.20 -0.30	0.3	0.002	0.05
. . .	4620H	0.17 -0.23	0.35 -0.75	0.025	0.015	0.15 -0.35	. . .	1.55 -2.00	0.20 -0.30	0.3	0.002	0.05
. . .	4720H	0.17 -0.23	0.45 -0.75	0.025	0.015	0.15 -0.35	0.30 -0.60	0.85 -1.25	0.15 -0.25	0.3	0.002	0.05
. . .	4817H	0.14 -0.20	0.30 -0.70	0.025	0.015	0.15 -0.35	. . .	3.20 -3.80	0.20 -0.30	0.3	0.002	0.05
. . .	4820H	0.17 -0.23	0.40 -0.80	0.025	0.015	0.15 -0.35	. . .	3.20 -3.80	0.20 -0.30	0.3	0.002	0.05
. . .	5120H	0.17 -0.23	0.60 -1.00	0.025	0.015	0.15 -0.35	0.60 -1.00	. . .	. . .	0.3	0.002	0.05
. . .	8617H	0.14 -0.20	0.60 -0.95	0.025	0.015	0.15 -0.35	0.35 -0.65	0.35 -0.75	0.15 -0.25	0.3	0.002	0.05
. . .	8620H	0.17 -0.23	0.60 -0.95	0.025	0.015	0.15 -0.35	0.35 -0.65	0.35 -0.75	0.15 -0.25	0.3	0.002	0.05
. . .	9310H	0.07 -0.13	0.40 -0.70	0.025	0.015	0.15 -0.35	1.00 -1.45	2.95 -3.55	0.08 -0.15	0.3	0.002	0.05
B20	20Cr3	0.17 -0.23	0.60 -1.00	0.025	0.015	0.40 max	0.60 -1.00	. . .	. . .	0.3	0.002	0.05
B21	20Cr4	0.17 -0.23	0.60 -0.90	0.025	0.015	0.40 max	0.90 -1.20	. . .	. . .	0.3	0.002	0.05
B22	20MnCr4-2	0.17 -0.23	0.65 -1.10	0.025	0.015	0.40 max	0.40 -0.75	. . .	. . .	0.3	0.002	0.05
B23	17MnCr5	0.14 -0.19	1.00 -1.30	0.025	0.015	0.40 max	0.80 -1.10	. . .	. . .	0.3	0.002	0.05
B24	19MnCr5	0.17 -0.22	1.10 -1.40	0.025	0.015	0.40 max	1.00 -1.30	. . .	. . .	0.3	0.002	0.05
B25	15CrMo4	0.12 -0.18	0.60 -0.90	0.025	0.015	0.40 max	0.90 -1.20	. . .	0.15 -0.25	0.3	0.002	0.05
B26	20CrMo4	0.17 -0.23	0.60 -0.90	0.025	0.015	0.40 max	0.90 -1.20	. . .	0.15 -0.25	0.3	0.002	0.05
B27	20MnCrMo4-2	0.17 -0.23	0.65 -1.10	0.025	0.015	0.40 max	0.40 -0.75	. . .	0.10 -0.20	0.3	0.002	0.05
B28	20NiCrMo2	0.17 -0.23	0.60 -0.95	0.025	0.015	0.40 max	0.35 -0.65	0.40 -0.70	0.15 -0.25	0.3	0.002	0.05
B29	20NiCrMo7	0.17 -0.23	0.40 -0.70	0.025	0.015	0.40 max	0.35 -0.65	1.60 -2.00	0.20 -0.30	0.3	0.002	0.05
B30	18CrNiMo7-6	0.15 -0.21	0.50 -0.90	0.025	0.015	0.40 max	1.50 -1.80	1.40 -1.70	0.25 -0.35	0.3	0.002	0.05
B31	18NiCrMo14-6	0.15 -0.20	0.40 -0.70	0.025	0.015	0.40 max	1.30 -1.60	3.25 -3.75	0.15 -0.25	0.3	0.002	0.05
B32	16NiCrMo16-5	0.14 -0.18	0.25 -0.55	0.025	0.015	0.40 max	1.00 -1.40	3.80 -4.30	0.20 -0.30	0.3	0.002	0.05

Inclusion Rating
Rating Units
Thin Series	Heavy Series
A-2 1/2	A-1 1/2
B-2	B-1
C-1/2	C-1/2
D-1	D-1

Decarburrization and surface imperfections for coils anf bars for balls and rollers
size,in.(mm)	Decarburization or Surface Imperfections per Side,max,in.(mm)
size,in.(mm)	Hot-Rolled or Hot Rolled Annealed	Cold-Finished
Through 0.250(6.35)	0.005(0.13)	0.003(0.08)
Over 0.250(6.35)-0.500(12.7),Incl	0.006(0.15)	0.004(0.10)
Over 0.500(12.7)-0.750(19.1),Incl	0.008(0.20)	0.006(0.15)
Over 0.750(19.1)-1.000(25.4),Incl	0.010(0.25)	0.008(0.20)

Decarburization and Surface Imperfections for Bars and Tubes
size,In.(mm)	Decarburization or Surface Imperfections per Side,Max,in.(mm)
	Hot-Rolled bars	Annealed		Cold-Finished
	Hot-Rolled bars	Bars	Tubes	Bars	Tubes
Through 1.000(25.4)	0.012(0.31)	0.015(0.38)	0.012(0.31)	0.012(0.31)	0.010(0.21)
Over 1.000(25.4)-2.000(50.8),Incl	0.017(0.43)	0.022(0.56)	0.020(0.51)	0.015(0.38)	0.014(0.36)
Over 2.000(50.8)-3.000(76.2),Incl	0.025(0.64)	0.030(0.76)	0.030(0.76)	0.025(0.64)	0.019(0.48)
Over 3.000(76.2)-4.000(101.6),Incl	0.035(0.89)	0.045(1.14)	0.035(0.89)		0.024(0.61)
Over 4.000(101.6)-5.000(127.0),Incl	0.055(1.40)	0.065(1.65)	0.040(1.02)		0.028(0.71)

Company Details

Bronze Gleitlager

Bronze Sleeve Bushings

and

Graphite Plugged Bushings

from Quality China Factory

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Business Type:

Manufacturer,Distributor/Wholesaler,Importer,Exporter,Trading Company,Seller 
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Year Established:

1997 
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Total Annual:

25000000-30000000
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Employee Number:

100~200 
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Ecer Certification：

Verified Supplier 

Company Overview A Professional Steel Tube Manufacturer and Solution Provider TORICH INTERNATIONAL LIMITED integrates steel tube manufacturing, international trade, warehousing, technical support and customized processing. Our manufacturing operations cover cold drawing, cold rolling, heat treat... Company Overview A Professional Steel Tube Manufacturer and Solution Provider TORICH INTERNATIONAL LIMITED integrates steel tube manufacturing, international trade, warehousing, technical support and customized processing. Our manufacturing operations cover cold drawing, cold rolling, heat treat...

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TORICH INTERNATIONAL LIMITED
Suite 1604-3, Hongan Plaza, #258 Die Yuan Road, Yinzhou District, Ningbo City, China
https://www.precision-steeltube.com/

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