Stkm11A Seamless Steel Tubing

Product Description

SPECIFICATION:

Standard & Material	Carbon Steel	ASTM A519 Standard	MT1010, MT1020, 1008, 1010, 1018, 1020, 1025, 1030, 1045, 1518
		JIS G3445 Standard	STKM11A  STKM12A  STKM12B  STKM12C   STKM13A  STKM13B   STKM13C   STKM14A  STKM14B  STKM14C  STKM15A  STKM15C   STKM16A  STKM16C   STKM17A   STKM17C  STKM18A  STKM18B  STKM18C   STKM19A  STKM19C  STKM20A
		JIS G3473 Standard	STC370, STC440, STC510A, STC510, STC540, STC590A, STC590B
		DIN 2391 Standard	St 35, St45, St52
		EN 10297-1 Standard	E235, E275, E315, E355, E470
		EN 10305-1 Standard	E215, E235, E355
		EN 10305-4 Standard	E215, E235, E355
		BS 6323-3 Standard	HFS 3, HFS 4, HFS 5, HFS 8
		NF A49-311	TU 37-b, TU 52-b, TU 56-b, TU XC35
	Alloy Steel	ASTM A519 Standard	1345, 3140, 4130, 4135, 4140, 4150, 4320, 4340, 5120, 5130
		JIS G3429 Standard	STH11, 12 STH21, 122 STH31
		JIS G3441 Standard	SCR420TK, SCM415TK, SCM418TK, SCM420TK, SCM430TK, SCM440TK
	Stainless Steel	ASTM A511 Standard	MT304, MT304L, MT310S, MT316, MT316L, MT317, MT321, MT347,   MT403, MT410, MT431
		ISO Standard	NACE MR-0175
Size		Size Range	Tolerance
	OD	6-325mm	-0.035 -- +0.045mm
	ID	2-250mm	±0.035mm
	WT	1-32mm	depends on sizes
	Length	random or fixed length	+0-3.5mm
	Straightness	0.15:1000, 0.4:1000, 0.5:1000 1:1000 or customized
	Surface Roughness	Ra 0.02-0.4μm

   
CHEMICAL COMPOSITION:
 

Steel Grade	C(%)	Si(%)	Mn(%)	P(%)	S(%)	Nb/V(%)
STKM11A	≤0.12	≤0.35	≤0.60	≤0.040	≤0.040	-
STKM12A	≤0.20	≤0.35	≤0.60	≤0.040	≤0.040	-
STKM12B	≤0.20	≤0.35	≤0.60	≤0.040	≤0.040	-
STKM12C	≤0.20	≤0.35	≤0.60	≤0.040	≤0.040	-
STKM13A	≤0.25	≤0.35	0.30~0.90	≤0.040	≤0.040	-
STKM13B	≤0.25	≤0.35	0.30~0.90	≤0.040	≤0.040	-
STKM13C	≤0.25	≤0.35	0.30~0.90	≤0.040	≤0.040	-
STKM14A	≤0.30	≤0.35	0.30~1.00	≤0.040	≤0.040	-
STKM14B	≤0.30	≤0.35	0.30~1.00	≤0.040	≤0.040	-
STKM14C	≤0.30	≤0.35	0.30~1.00	≤0.040	≤0.040	-
STKM15A	0.25~0.35	≤0.35	0.30~1.00	≤0.040	≤0.040	-
STKM15C	0.25~0.35	≤0.35	0.30~1.00	≤0.040	≤0.040	-

MECHANICAL PROPERTIES:


 

Steel Grade	Tensile Strength(N/mm²)	Yield Strength(N/mm²)
STKM11A	≥290	-
STKM12A	≥340	≥175
STKM12B	≥390	≥275
STKM12C	≥470	≥355
STKM13A	≥370	≥215
STKM13B	≥440	≥305
STKM13C	≥510	≥380
STKM14A	≥410	≥245
STKM14B	≥500	≥355
STKM14C	≥550	≥410
STKM15A	≥470	≥275
STKM15C	≥580	≥430

DELIVERY CONDITION:
 

+C(BK)	Cold drawn/hard.After the last cold forming,no heat treatment.
+LC(BKW)	Cold drawn/soft.After the last heat treatment follows the cold drawing there is a light finishing pass.
+SR(BKS)	Cold drawn and stress relieved annealed. After the final cold drawing process the tubes are stress relieved annealed in a controlled atmosphere.
+A(GBK)	After the final cold drawing process the tubes are stress relieved annealed in a controlled atmosphere.
+N(NBK)	Normalized. After the last cold drawing process the tubes are annealed in a controlled atmosphere.

QUALITY CONTROL:

   
                   


                          
20 -60 Centigrade Impact Testing Machine          DM2500M Metallographic Microscope

                   

HRS-ISO Rockwell Hardness Tester             MAXXLMFO4 Direct Reading Spectrometer

                    

MH2000 Carbon Sulfur Analyzer                       SHT4605 Universal Testing Machine
                                    

OUR INVENTORY:


PRODUCT APPLICATION:







                      

PRODUCT PACKAGING & SHIPMENT:




FAQ: 
1. Q: What's the surface roughness of seamless mechanical tubing you could do ?
    A:Surface Roughness: a=0.02~0.4micron or depends on the customer's requirement.
 
2. Q: How's the straightness of cold drawn mechanical tubes?
    A: Straightness:0.3~0.8mm/1000mm
 
3. Q: Shall we get the discount if repeating our orders?
    A: Of course, biggest discount will be shared with the regular customers.