JIS G3445 STKM12 Carbon Steel Tubes

Introduction

JIS G3445 standard covers 22 grades. STKM12 is one of these steel grades, STKM12 can be divided into three types: STKM12A, STKM12B, and STKM12C. STKM12B is equivalent to q275 grade in GB standard. This material has good plasticity and toughness, which makes steel pipes is easy to process and weld, while maintain high strength. STKM12 carbon steel pipes can be manufactured by seamless or welded process, in order to ensure the mechanical properties of steel pipes, different types of steel pipes will be hot or cold finished before shipment.

 

Specification

Product name	JIS G3445 Seamless Steel Tubes
Place of origin	China
Standard	JIS G3445
Material grade	STKM11A, STKM12(A, B, C), STKM13(A, B, C), STKM14(A, B, C)
Type	Seamless
Finished method	Hot finished or Cold finished
Outer diameter	19.05mm-114.3mm
Wall thickness	2mm-20mm
Length	3m-12m or customized length
Pipe ends	Plain ends, Bevel ends or as per clients' requirements

 

Chemical composition %

Grade	Symbol of grade	C,max	Si,max	Mn,max	P,max	S,max
Grade 12	STKM12A	0.20	0.35	0.60	0.04	0.04
	STKM12B
	STKM12C

 

 

Mechanical properties

Grade	Symbol of grade	Tensile strength,min(Mpa)	Yield strength,min(Mpa)	Elongation,min(%)
Grade 12	STKM12A	340	175	35
	STKM12B	390	275	25
	STKM12C	470	355	20

 

 

Tolerances on outer diameter and wall thickness

Category	Outer diameter/mm	Tolerances on outer diameter	Wall thickness/mm	Tolerances on wall thickness
Hot finished seamless steel pipe	<50	±0.5mm	<4	+0.6mm -0.5mm
	≥50	±1.0%	≥4	+15% -12.5%

 

 

Product show

 

The pipe ends of steel pipes can be customized according to your requirements.(Plain ends, Bevel ends, and Threaded ends, etc.)

 

 

Applications

Due to their excellent mechanical properties and high strength, STKM12 carbon steel tubes are widely used in multiple industries.

1. Machine parts: Used to manufacture various machine parts, such as bearings and gears, etc.

2. Automobile manufacturing: Used for manufacturing of various automobile components, such as suspension systems and transmission systems, etc.

3. STKM12 carbon steel pipes also can be used as the support structure and connection components of furniture.

 

Our advantages

1. Large inventory: Seamless steel pipes of various standards and materials are available in stock. If you are looking for seamless steel pipes, our products can meet your requirements.

2. Fast delivery: Fast delivery is our best advantage, we can rapidly pick the goods up from stock or other factories, the goods can be shipped in a short time. The delivery is very fast.

3. High quality and best price: Our products are mainly come from other well-known factories, the quality of steel pipes is very high. And our prices are competitive.

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