JIS G3445 Stkm11A Carbon Steel Pipes

• Customization: Available
• Type: Seamless
• Technique: Cold Drawn
• Model NO.: KM-20200902
• Surface Treatment: Oiled
• Usage: Boiler Pipe, Hydraulic/Automobile Pipe, Food/Beverage/Dairy Products, Machinery Industry, Special Purpose
• Section Shape: Round
• Standards: JIS G3445
• Materials: Stkm11A,Stkm12,Stkm13,Stkm14,Stkm15,Stkm16
• Diameter: 19.05mm - 114.3mm
• Thickness: 2.0mm - 20 mm
• Packaging: in Bundles or Wooden Boxes
• Delivery Time: 35~45 Days
• Transport Package: in Bundles or Wooden Cases
• Specification: 19.05mm - 114.3mm
• Trademark: KINGMETAL
• Origin: China
• HS Code: 7306309000
• Production Capacity: 1000 Tons Per Month

Product Description

JIS G3445 STKM11A Carbon Steel pipes

Standard Specification of JIS G3445 Carbon Steel Seamless Tube :

Standard	JIS G3445
Grade	STKM11A,STKM12,STKM13,STKM14,STKM15,STKM16,STKM17,STKM18,STKM19,STKM20
Outer Dimensions	19.05mm - 114.3mm
Wall Thickness	2.0mm - 20 mm
Length	max 16000mm

Packing: Bare/bundles/crates/crate protection at the both sides of tubes or as per customers' requirements .
 

Chemical Compositions(%):

Grade	C	Si	Mn	P	S
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

Appearance

• The tubes shall be practically straight. and the two ends shall be at right angles to the axis of the tube
• The tubes shall be free from defects detrimental to practical use.
• The surface finish of the tubes, when especially specified shall be agreed upon by the purchaser and the manufacturer.

Mechanical Properties:

Grade	Yield Strength (Mpa)	Tensile Strength (Mpa)	Elongation (%)
STKM11A	\	≥290	≥35
STKM12A	≥175	≥340	≥35
STKM12B	≥275	≥390	≥25
STKM12C	≥355	≥470	≥20
STKM13A	≥215	≥370	≥30
STKM13B	≥305	≥440	≥20
STKM13C	≥380	≥510	≥15
STKM14A	≥245	≥410	≥25
STKM14B	≥355	≥500	≥15
STKM14C	≥410	≥550	≥15

The tubes shall be manufactured by seamless process, electric resistance welding process, or butt welding process, and those of other grades shall be manufactured by seamless process or electric resistance welding process. The tube shall be as manufactured or as cold-finished condition, or they shall be subjected to appropriate heat treatment.

Grade and Designation

The grade and designation of the tube shall be as given as follows table.

Grade	Designation
Grade 11	A	STKM 11A
Grade 12	A	STKM 12A
	B	STKM 12B
	C	STKM 12C
Grade 13	A	STKM 13A
	B	STKM 13B
	C	STKM 13C
Grade 14	A	STKM 14A
	B	STKM 14B
	C	STKM 14C
Grade 15	A	STKM 15A
	C	STKM 15C
Grade 16	A	STKM 16A
	C	STKM 16C
Grade 17	A	STKM 17A
	C	STKM 17C
Grade 18	A	STKM 18A
	B	STKM 18B
	C	STKM 18C
Grade 19	A	STKM 19A
	C	STKM 19C
Grade 20	A	STKM 20A

The sub classification letter symbols A, B and C are used to indicate distinction of method of manufacturing the tube, cold working process, heat treatment, etc.

World standard Comparative with JIS G3445

NUBER	GRADE	NUBER	GRADE	NUBER	GRADE	NUBER	GRADE
D 3517	Grade 11 A	STKM 11 A	A513	MT1010	G-3445	STKM11A	-	-
			A519	MT1010
	Grade 12A	STKM 12 A	A513	MT1015		STKM12A	980	CDS-3
			A519	MT1015
	Grade 12 B	STKM 12 B	-	-		STKM12B	-	-
	Grade 12C	STKM 12C	A512	MT1015		STKM12C	-	-
			A513
	Grade 13 A	STKM 13 A	A512	MT  1025		STKM13A	-	-
			A513	MTX1025
			A519	MT  1025
	Grade13B	STKM 13 B	-	-		STKM13B	980	CDS-4
	Grade13 C	STKM 13 C	-	-		STKM13C	-	-
	Grade14 A	STKM 14 A	A513	MT1030		STKM14A	1717	CDS-103
			A519	MT1030
	Grade14 B	STKM 14 B	-	-		STKM14B	-	-
	Grade14 C	STKM 14 C	-	-		STKM14C	-	-
	Grade15 A	STKM 15 A	A513	MT1033		STKM15A	1717	CDS-105
	Grade15 C	STKM 15 C	-	-		STKM15C	-	-
	Grade16 A	STKM 16 A	A519	MT1040		STKM16A	980	CDS-5
	Grade16 C	STKM 16 C	-	-		STKM16C	-	-
	Grade17 A	STKM 17 A	A519	MT1050		STKM17A	980	CDS-7
							1717	CDS-107
	Grade17 C	STKM 17 C	-	-		STKM17B	-	-
	Grade18 A	STKM 18 A	A519	MT1524		STKM18A	980	CDS-9
	Grade18 B	STKM 18 B	-	-		STKM18B	-	-
	Grade18 C	STKM 18 C	-	-		STKM18C	-	-
	Grade19 A	STKM 19 A	-	-		-	-	-
	Grade19 C	STKM 19 C	-	-		-	-	-
	Grade20 A	STKM 20 A	-	-		-	-	-

The tubes shall be practically straight. and the two ends shall be at right angles to the axis of the tube. The tubes shall be free from defects detrimental to practical use.

Tolerance on Outside Diameter

Division	Tolerances on outside diameter
No. 1	Under 50mm ±0.5mm
	50mm or over ±1%
No. 2	Under 50mm ±0.25mm
	50mm or over ±0.5%
No. 3	Under 25mm ±0.12mm
	25mm or over to and excl. 40mm ±0.15mm
	40mm or over to and excl. 50mm ±0.18mm
	50mm or over to and excl. 60mm ±0.20mm
	60mm or over to and excl. 70mm ±0.23mm
	70mm or over to and excl. 80mm ±0.25mm
	80mm or over to and excl. 90mm ±0.30mm
	90mm or over to and excl.100mm ±0.40mm
	100mm or over ±0.50%

Tolerance of Thickness

Division	Tolerances on wall thickness
No. 1	Under 4mm
	+0.6mm
	-0.5mm
	4mm or over
	15%
	-12.50%
No. 2	Under 3mm
	±0.3mm
	3mm or over