STKM11A Carbon Steel | JIS G 3445 Grade Equivalent Material

JIS G 3445 Grade STKM11A Steel Tube, stkm11a Chemical Composition, stkm11a equivalent material, stkm11a material properties, stkm11a yield strength, STKM 11A Steel Tube Supplier

Solitaire Overseas is a well-established STKM11A cold rolled tube manufacturer and supplier known for delivering high-quality steel products across the country. Our JIS G3445 STKM11A tubes are made from low carbon steel, which is ideal for various mechanical and structural applications. These carbon seamless steel tubes are produced according to the JIS G3445 standard, ensuring they meet rigorous quality and performance criteria. With a maximum carbon content of 0.12% and a manganese content of 0.60%, STKM11A steel offers excellent formability and machinability, making it a popular choice for manufacturing CS pipes and MS pipes.

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The JIS G3445 STKM11A steel grade, also known as mild steel, provides several advantages due to its specific chemical composition. This steel grade features a controlled balance of carbon, manganese, and silicon, with a maximum sulfur (S) and phosphorus (P) content of 0.035%. For higher quality, P and S levels can be controlled even further, to below 0.025% and 0.020%, respectively. This low carbon steel is relatively softer than high carbon steel but can be hardened through processes like carburizing, which enhances its surface hardness.

JIS G3445 STKM11A steel is known for its versatility and cost-effectiveness. It can be forged into a variety of shapes, including round, square, and flat sections, as well as plates and seamless tubes. These tubes are commonly used in the manufacturing of general structural parts, mechanical components, and fluid conveyance systems. The steel's excellent formability makes it suitable for many applications in construction and engineering projects, providing a reliable and affordable solution for your material needs.

At Solitaire Overseas, we pride ourselves on offering top-notch STKM11A cold rolled tubes to meet diverse industrial requirements. Our products adhere to the highest standards of quality and performance, backed by our commitment to excellent customer service. Whether you need mild steel pipes for building structures, mechanical parts, or other applications, our STKM11A steel tubes provide the durability and flexibility you need at competitive prices.

Specification of JIS G 3445 Grade STKM 11A

Specification	Details
Standard	JIS G3445
Description Name	STKM 11A Steel tube, STKM 12A steel tubes, STKM 12C steel tubes, STKM 13A steel tubes, STKM 13C steel tubes
Size	6mm-340mm
Wall Thickness	1mm-50mm
Shape	Round
Production Type	Cold drawn, cold rolled or hot rolled
Length	Single random length/ Double random length or as customer’s actual request max length is 10m
Grade	STKM 11A, STKM 12A, STKM 12C, STKM 12B, STKM 13A, STKM 13B, STKM 13C, STKM 15A, STKM 17A

Chemical Composition of JIS G 3445 Grade STKM11A

C	Si	Mn	P	S
max 0.12	max 0.35	max 0.6	max 0.04	max 0.04

JIS G 3445 Grade STKM11A Mechanical Properties

Assortment	Yield point or Proof stress	Tensile strength	Elongation	Reduction of area	Charpy impact strength
-	N/mm ²	N/mm ²	%	%	J/cm ²
Tubes		290	35

STKM11A Physical Properties

Tensile strength	115-234	σb/MPa
Yield Strength	23	σ 0.2 ≥/MPa
Elongation	65	δ5≥ (%)
ψ	-	ψ≥ (%)
Akv	-	Akv≥/J
HBS	123-321	-
HRC	30	-

JIS G 3445 Grade STKM11A Tolerance on Outside Diameter

Division	Tolerances on outside diameter
No. 1	Under 50mm ±0.5mm
No. 1	50mm or over ±1%
No. 2	Under 50mm ±0.25mm
No. 2	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

STKM11A Heat Treatment Regime

Annealing	Quenching	Tempering	Normalizing	Q & T
√	√	√	√	√

STKM11A Range of Products

Product type	Product	Dimension	Processes	Deliver Status
Plates / Sheets	Plates / Sheets	0.08-200mm(T)WL	Forging, hot rolling and cold rolling	Annealed, Solution and Aging, Q+T, ACIDWASHED, Shot Blasting
Steel Bar	Round Bar, Flat Bar, Square Bar	Φ8-1200mm*L	Forging, hot rolling and cold rolling, Cast	Black, Rough Turning, Shot Blasting,
Coil / Strip	Steel Coil /Steel Strip	0.03-16.0x1200mm	Cold-Rolled & H	Annealed, Solution and Aging, Q+T, ACIDWASHED, Shot Blasting
Pipes / Tubes	Seamless Pipes/Tubes, Welded Pipes/Tubes	OD:6-219mm x WT:0.5-20.0mm	Hot extrusion, Cold Drawn, Welded	Annealed, Solution and Aging, Q+T, ACIDWASHED

STKM11A Application & Use

JIS G3445 STKM11A steel tubes are essential components in many industries due to their strength and versatility. Produced under the JIS G3445 standard, these low carbon steel tubes are known for their excellent durability and are used in a variety of applications across automotive, machinery, and construction sectors.

FAQ Of STKM 11A Carbon Steel Seamless Tubes

What is STKM 11A material?

STKM 11A is a carbon steel material defined under JIS G3445 standards, primarily used for mechanical tubing in automotive and industrial applications. It offers excellent machinability, weldability, and moderate strength.

What are the properties of STKM 11A?

STKM 11A features good tensile strength, excellent formability, and high weldability. It is ideal for automotive components, machinery parts, and structural tubing requiring precision and durability under normal stress conditions.

What is JIS g3445 material?

JIS G3445 is a Japanese Industrial Standard specifying carbon steel tubes for mechanical structures. These tubes are used in automotive, machinery, and general engineering applications, offering high strength, reliability, and ease of fabrication.

What is JIS G3445?

JIS G3445 is the standard set by the Japanese Industrial Standards for carbon steel tubes used in mechanical structures. It covers grades like STKM11A, STKM12A, and STKM13A, ensuring quality and performance for industrial and automotive use.

What is the equivalent material of stkm13a in India?

The equivalent material of STKM13A in India is typically IS 3074 ERW-1 or IS 4923, which are Indian standards for carbon steel tubes with similar chemical composition and mechanical properties suited for structural and mechanical applications.