STKM11A Chemical Composition
STKM11A is a type of carbon steel tube classified under the Japanese Industrial Standard (JIS) and is commonly used for general structural purposes. Its chemical composition plays a crucial role in determining the properties and applications of this material.
Table of Contents
- STKM11A Chemical Composition
- Mechnical Properties of JIS G3445 Grade STKM11A
- Equivalent Materials to STKM11A
- Flattening and Bending Tests of ASTM A519 MT1010
- Physical Properties of STKM11A
- Tolerances of JIS G3445 STKM11A Tubes
- Chemical Compatibility of STKM11A Material
- ASTM Standards for Grade 11A
- Product Range of MT1010
- Delivery Conditions for DIN 1.0034
- Hardness of STKM11A
- Smelting Temperature of ASTM A519 MT1010
- Thermal Properties of JIS G3445 Gr STKM11A
- Cold Finishing Temperature of Grade 11A
- Creep Strength of MT1010 Material
- Working Temperature Range of STKM 11A
- Testing Methods for EN 1.0034
- Heat Treatment Techniques for STKM 11A
- Inspection Report for STKM11A Carbon Steel Tubes
STKM11A Chemical Composition
Mechanical Properties of JIS G3445 Grade STKM11A
| Elongation A (%) |
Yield Strength Rp0.2 (MPa) |
Tensile Strength Rm (MPa) |
Impact KV (J) |
Reduction in Cross Section on Fracture Z (%) |
|---|---|---|---|---|
| 13 | 518 (≥) | 424 (≥) | 34 | 23 |
Manufacturing Techniques for Grade 11A as per JIS G3445 STKM11A Steel Equivalent
STKM11A tubes are produced through continuous processes and are available in both hot-finished and cold-finished forms. Hot finishing involves processing at temperatures above the recrystallization point, whereas cold finishing is performed at room temperature.
Buyers or consumers who require larger diameters (above 38mm) typically opt for hot-finished tubes, while smaller diameters can utilize cold-finished techniques for better dimensional accuracy and surface finish.
Hot-finished tubes maintain high processing temperatures during production, enhancing their structural integrity. In contrast, cold-finished STKM11A tubes undergo additional heating steps to refine their structure and improve dimensional precision.
Equivalent Materials to STKM11A
| Number | Grade | ASTM Number | JIS | Mechanical | |
|---|---|---|---|---|---|
| D 3517 | Grade 11 A | STKM 11 A | A513 | G-3445 | MT1010 |
Flattening and Bending Tests of ASTM A519 MT1010
| Flattening Test | Bending Test | |
|---|---|---|
| Distance between that parts (D=OD) |
Bend Angle |
Inside Radius (D=OD) |
| 1/2D | 180° | 4D |
STKM11A Contains 0.40% Silicon, Explore Physical Properties of STKM11A Steel Pipe
Its high density provides a balanced strength-to-weight ratio, making it robust and durable for demanding applications. Despite its weight, it performs well in high-temperature environments, ensuring structural integrity and reliability.
Physical Properties of Grade STKM11A
| Density kg/dm3 |
Thermal Conductivity W/mK |
Temperature T °C/F |
Specific Heat J / kgK |
|---|---|---|---|
| 371 (≥) | 13 | 34 | 41 |
Tolerances of JIS G3445 STKM11A Tube
| Wall Thickness (WT) | Tolerances on Wall Thickness (WT) |
|---|---|
| Under 4mm | +0.6 -0.5 |
| 4mm or over | +15% -12.5% |
| Under 3mm | ±0.3 |
| 3mm or over | ±10% |
| Under 2mm | ±0.15 |
| 2mm or over | ±8% |
Chemical Compatibility of STKM11A Material
| Medium | Symbol | Compatibility |
|---|---|---|
| Acetonitrile (Methyl Cyanide) |  |
Excellent |
| Acetyl Chloride |  |
Good |
| Adipic Acid | |
Excellent |
| Alcohol: Isobutyl |  |
Good |
| Allyl Bromide | |
Not Recommended |
| Amyl Acetate (Banana Oil) | |
Fair to Poor |
| Butyric Acid | |
Not Recommended |
ASTM Standards for Grade 11A
| Standard | |
|---|---|
| ASTM A519 | ASTM A513 |
Product Range of MT1010
| Product | Dimension | Process |
|---|---|---|
| Seamless and Welded Pipes/Tubes | OD:6-219mm x WT:0.5-20.0mm | Welded, Hot Extrusion, Cold Drawing |
| Plates / Sheets | 0.08-200mm(T)*W*L | Forging, Cold and Hot Rolling |
| Round Bar | Φ8-1200mm*L | Cast, Forging, Cold and Hot Rolling |
| Coil / Strip | 0.03-16.0x1200mm | Hot-Rolled & Cold-Rolled |
Delivery Conditions for DIN 1.0034
| Designation | Symbol |
|---|---|
| Cold Finished (Soft) | BKW |
| Cold Finished (Hard) | BK |
| Cold Finished and Stress-Relieved | BKS |
| Normalized | NBK |
| Annealed | GBK |
STKM11A Material Widely Used in the Automobile Industry, Refer Hardness of STKM 11A JIS G3445 Grade
This material is extensively used in the automobile industry due to its high hardness and excellent strength, which are achieved through its chemical composition and manufacturing processes. These properties make it suitable for applications requiring resistance to pressure and impact, such as automotive components.
Therefore, choosing this material ensures durability and long-lasting performance.
Hardness of STKM11A
| Hardness | |
|---|---|
| 77 HRB | 212 HBW |
Smelting Temperature of ASTM A519 MT1010
| Smelting Temperature | 1821°C – 1823°C |
|---|
DIN 1.0034 Melting Range is 1480 – 1526 °C, Check Thermal Properties of ASTM A519 MT1010 Material
Its moderate thermal conductivity allows for efficient heat transfer, making it suitable for automotive exhaust systems and heat exchangers when used within appropriate temperature ranges.
Thermal Properties of JIS G3445 Gr STKM11A
| Temperature (°C) | 14 | 314 | 937 |
|---|---|---|---|
| Modulus of Elasticity (GPa) | – | 281 | – |
| Mean Coefficient of Thermal Expansion ×10-6/(°C) | – | – | 13 |
| Thermal Conductivity (W/m·°C) | – | 31.3 | 42.2 |
| Specific Thermal Capacity (J/kg·°C) | – | 111 | – |
| Specific Electrical Resistivity (Ω mm²/m) | 0.33 | – | – |
| Density (kg/dm³) | – | – | 443 |
| Poisson’s Coefficient, ν | – | – | 124 |
Cold Finishing Temperature of Grade 11A
| Temperature | 1200°F [650°C] |
|---|
View Creep Strength and Temperature Range of STKM11A Carbon Steel Material
The creep strength and rupture properties of STKM11A are influenced by its chemical composition and microstructure. It is designed to operate effectively in low to moderate temperature ranges, ensuring optimal performance and longevity.
Creep Strength of MT1010 Material
| Creep Strain (10000h) (Rp1,0) N/mm² |
Creep Rupture (10000h) (Rp1,0) N/mm² |
|---|---|
| 141 | 922 |
Working Temperature Range of STKM 11A
| Temperature Range | 425 °C |
|---|
Testing Methods for EN 1.0034
Ultrasonic Inspection
Eddy Current Inspection
Magnetic Particle Inspection
Spectro-Chemical Analysis
Electromagnetic Inspection
Heat Treatment Techniques for STKM 11A
| Annealing | Quenching | Tempering | Normalizing | Q & T |
|---|---|---|---|---|
| √ | √ | √ | √ | √ |
Inspection Report for STKM11A Carbon Steel Tubes
| OD. (mm) |
Tolerance (mm) |
ID. (mm) |
Tolerance (mm) |
Length (mm) |
Tolerance (mm) |
Straightness (mm) |
|---|---|---|---|---|---|---|
| 4 | ±0.05 | 1.5 | -0/+20 | 3000 | ±0.05 | 1:1000 |
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