JIS G3445 Precision Seamless Steel Pipe, Cold Drawn, IATF16949 Certified Stkm 12A

• Customization: Available
• After-sales Service: Free
• Warranty: Free
• Model NO.: OD 15-70mm
• Type: Seamless
• Technique: Cold Drawn
• Material: Carbon Steel
• Surface Treatment: Oiled
• Usage: Hydraulic/Automobile Pipe, Machinery Industry, Special Purpose
• Section Shape: Round
• Deform: Cold Drawn
• Precision: High Precision
• Customized: Yes
• Mtc: 3.1 or 3.2 Certificate
• Transport Package: Bund
• Trademark: bluesky pipe
• Origin: China
• HS Code: 7304319000
• Production Capacity: 50000 Ton/Year

Product Description

Company Profile

 

Product Description

Our JIS G3445 High Precision Tube stands as the epitome of engineering excellence. As a cold drawn precision seamless steel pipe, it boasts high dimensional accuracy and an impeccable surface smoothness, making it the go-to choice for mechanical structures and hydraulic equipment. Opting for our precision seamless pipes not only reduces machining time and enhances material utilization but also elevates the quality of the final product, ensuring superior performance and durability.
Achieving smaller, high-quality small-diameter seamless steel pipes demands precision techniques such as cold rolling and cold drawing, or their seamless integration. Cold rolling, performed on a two-roll mill, transforms steel pipes through a circular hole pattern composed of a variable cross-section circular groove coupled with a steadfast conical top. Cold drawing, meanwhile, is executed on single or double chain cold drawing machines, with capacities ranging from 0.5 to 100 tons, ensuring versatility and precision in manufacturing.

Detailed Photos

 

 

Product Parameters

GRADE	C	Si	Mn	S	P
STKM 11 A	≤0.12	≤0.35	≤0.60	≤0.040	≤0.040
STKM12A	≤0.20	≤0.35	≤0.60	≤0.040	≤0.040
STKM 12 B
STKM 12 C
STKM 13 A	≤0.25	≤0.35	0.30~0.90	≤0.040	≤0.040
STKM 13 B
STKM 13 C
STKM 14 A	≤0.30	≤0.35	0.30~1.00	≤0.040	≤0.040
STKM 14 B
STKM 14 C
STKM ISA	0.25~0.35	≤0.35	0.30~1.00	≤0 040	≤0.040
STKM 15 C
STKM 16 A	0.35~0.45	≤0.40	0.40~1.00	≤0.040	≤0.040
STKM 16 C
STKM 17 A	0.45~0.55	≤0.40	0.40~1.00	≤0.040	≤0.040
STKM 17 C
STKM 18 A	≤0.18	≤0.55	≤1.50	≤0.040	≤0.040
STKM 18 B
STKM 18 C
STKM 19A	≤0.25	≤0.55	≤1.50	≤0.040	≤0.040
STKM 19 C
STKM20A	≤0.25	≤0.55	≤1.60	≤0.040	≤0.040

GRADE	Rel(Mpa)	Rm(Mpa)	A(%)	flatten
STKM 11 A	≥290	-	≥35	1/2D
STKM 12 A	≥340	≥175	≥35	2/3D
STKM 12 B	≥390	≥275	≥25	2/3D
STKM 12 C	≥470	≥355	≥20	-
STKM 13 A	≥370	≥215	≥30	2/3D
STKM 13 B	≥440	≥305	≥20	3/4D
STKM 13 C	≥510	≥380	≥15	-
STKM 14 A	≥410	≥245	≥25	3/4D
STKM 14 B	≥500	≥355	≥15	7/8D
STKM 14 C	≥550	≥410	≥15	-
STKM 15A	≥470	≥275	≥22	3/4D
STKM 15 C	≥580	≥430	≥12
STKM 16 A	≥510	≥325	≥20	7/8D
STKM 16 C	≥620	≥460	≥12	-
STKM 17 A	≥550	≥345	≥20	7/8D
STKM 17 C	≥650	≥480	≥10	-
STKM 18 A	≥440	≥275	≥25	7/8D
STXM 18 B	≥490	≥315	≥23	7/8D
STKM 18 C	≥510	≥380	≥15	-
STKM 19 A	≥490	≥315	≥23	7/8D
STKM 19 C	≥550	≥410	≥15
STKM 20 A	≥540	≥390	≥23	7/8D

 

Size tolerance
OD	Standard tolerance			Special tolerance
Outer Diameter	GB/T3639	DIN2391	EN10305	O D	thickness
4mm-20mm	±0.10 mm	±0.08 mm	±0.08 mm	±0.05mm	±0.05mm
20mm-30mm	±0.10 mm	±0.08 mm	±0.08 mm	±0.08 mm	±0.08 mm
31mm-40mm	±0.15 mm	±0.15 mm	±0.15 mm	±0.10 mm	±0.08 mm
41mm-60mm	±0.20 mm	±0.20 mm	±0.20 mm	±0.15 mm	±0.15 mm
61mm-80mm	±0.30 mm	±0.30 mm	±0.30 mm	±0.20 mm	±0.20 mm
81mm-120mm	±0.45 mm	±0.40 mm	±0.40 mm	±0.30 mm	±0.30 mm

Equivalent Material referance:
GB	TOCT	ASTM	BS	JIS	NF	DIN
10F		1010	040A10		XC10
10	10	10,101,012	045M10	S10C	XC10	C10,CK10
20	20	1020	050A20	S20C	XC18	C22,CK22
45	45	1045	080M46	S45C	XC45	C45,CK45
30CrMo	30XM	4130	1717COS110	SCM420	30CD4
42CrMo		4140	708A42		42CD4	42CrMo4
			708M40
35CrMo	35XM	4135	708A37	SCM3	35CD4	34CrMo4

GB		ASTM/ASME		DIN		EN		JIS
GB/T8162	10	A53	A	DIN1629	St37	EN17121	St37-2/3	G3454	STPG370
GB/T8163		A106	A
GB/T3639		A519	1010
	20	A53	B	DIN1629	St44	EN17121	St44-2/3	G3454	STPG410
		A106	B
		A519	1020
	45	A1045			CK45
	Q235	A519	1021			EN10210-1	S235JRH	G3444	STK400
						EN1097-1	E235
	Q345	A519	1524	DIN1629	St52			G3444	STK500
	37Mn5	J55
	35CrMo		4135					G4105	SCM435
	20Cr		5120						SCr420
	40Cr		5140						SCr440
	15CrMo								SCM415
	20CrMo		4119						SCM420
	42CrMo		4150/4142						SCM440
	20CrMnTi								SMK22

tandard

Grade

Chemical composition:(%)

C

Si

Mn

P≤

S≤

Cr

Mo

Cu≤

Ni≤

Ti

V

Nb

GB/T 699

10

0.07~0.13

0.17~0.37

0.35~0.65

0.035

0.035

≤0.15

0.25

0.3

20

0.17~0.23

0.17~0.37

0.35~0.65

0.035

0.035

≤0.35

0.25

0.3

35

0.32~0.39

0.17~0.37

0.50~0.80

0.035

0.035

≤0.25

0.25

0.3

45

0.42~0.50

0.17~0.37

0.50~0.80

0.035

0.035

≤0.25

0.25

0.3

GB/T3077

20Cr

0.18~0.24

0.17~0.37

0.50~0.80

0.035

0.035

0.70~1.00

40Cr

0.37~0.44

0.17~0.37

0.50~0.80

0.035

0.035

0.80~1.10

20CrMo

0.17~0.24

0.17~0.37

0.40~0.70

0.035

0.035

0.80~1.10

0.15~0.25

42CrMo

0.38~0.45

0.17~0.37

0.50~0.80

0.90~1.20

0.15~0.25

20CrMnTi

0.17~0.23

0.17~0.37

0.80~1.10

1.00~1.30

0.04

~0.10

steel grade	+C(BK)		+LC(BKW)		+SR(BKS)			+A(GBK)		+N(NBK)
	Rm(Mpa)	A(%)	Rm(Mpa)	A(%)	Rm(Mpa)	Reh(Mpa)	A(%)	Rm(Mpa)	A(%)	Rm(Mpa)	Reh(Mpa)	A(%)
10	430	8	380	10	400	300	16	335	24	320~450	215	27
20	550	5	520	8	520	375	12	390	21	440~570	255	21
35	590	5	550	7	-	-	-	510	17	≥460	280	21
45	645	4	630	6	-	-	-	590	14	540	340	18
25Mn	650	6	580	8	580	450	10	490	18	-	-	-
Q355B	640	4	580	7	580	450	10	450	22	490~630	355	22
Q420B	750	4	620	8	690	590	12	520	22	550~700	425	22
25CrMo	720	4	670	6	-	-	-	-	-	-	-	-
42CrMo	720	4	670	6	-	-	-	-	-	-	-	-

Material	10#-45#, 16Mn, A53-A369, Cr-Mo alloy, Q195-Q345, ST35-ST52, 10#, 20#, 45#,  16Mn, A213, A315, 30CrMo, Q195, Q215, Q235, Q345, ST35, St37, St45, St52
Surface	Black/ Bright
Standard	DIN, GB, JIS, DIN 17175, DIN 2391, GB 5310-1995, GB/T 13793-1992, GB/T 3094- 2000, GB/T3639, JIS G3101
Size	OD 15mm-75mm
	Thickness 1-14mm
Processing	Cold rolled/ Cold drawn
	1. BK (+C)  No heat treatment after last cold forming process.
	2. BKW (+LC) After last heat treatment there is a light finishing pass ( cold drawing)
	3. BKS (+SR) After the final cold forming process the tubes are stress relieve annealed.
	4. GBK (+A) After the final cold forming process the tubes are annealed in a controlled  atmosphere.
	5. NBK (+N) After the final cold forming process the tubes are annealed above the  upper transformation point in a controlled atmosphere.
Packing	Woven bag/ Wooden or crate carton/ Bundle Packing/ Plain end or vanished as per  customer's request.
Delivery time	Normally 30-40 working days

Certifications

FAQ

 

Q: Are you trading company or manufacturer?
A: We are professional manufacturer for steel pipes,and our company also is a very professional and technical foreign trade company for steel products. We have more export experience with competitive price and best after-sales service. Apart from this,we can provide a wide range of steel products to meet the requirement of customer.

Q:Will you delivery the goods on time?
A: Yes,we promise to provide best quality products and delivery on time no matter if the price change lot or not. Honesty is our company's tenet.

Q: Do you provide samples ? is it free or extra?
A: The sample could can provide for customer with free,but the freight will be covered by customer account. The sample freight will be returned to customer account after we cooperate.

Q: How can I get your quotation as soon as possible?
A: The email and fax will be checked within 24 hours,meanwhile,Wechat and WhatsApp will be online in 24 hours. Please send us your requirement and order information,specification(Steel grade,size,quantity,destination port),we will work out a best price soon.

Q: Do you have any certifications?
A: Yes,that's what we guarantee to our clients. we have IS09000,IATF16949 certinicate,ISO 14001 certificates etc.Our products are of high quality and we have professional engineers and development team.

Q: What is your terms of payment?
A:Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance ,balance before shipmenit or paid against copy of B/L within 5 working days. 100% Irrevocable L/C at sight is favorable payment term as well.

Q: Do you accept the third party inspection?
A: Yes absolutely we accept.