Carburizing Seamless Type Automotive Steel Tubes ASTM A534 Grade B20 B21

Price Negotiable

Price: negotiable

MOQ: 1 ton

Delivery Time: 60-90days

Brand: Torich

Product Description

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)