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. STKM11A Chemical Composition Mechanical Properties of JIS G3445 Grade STKM11A 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 Flattening and Bending Tests of ASTM A519 MT1010 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 Tolerances of JIS G3445 STKM11A Tube Chemical Compatibility of STKM11A Material ASTM Standards for Grade 11A Product Range of MT1010 Delivery Conditions for DIN 1.0034 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 Smelting Temperature of ASTM A519 MT1010 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 Cold Finishing Temperature of Grade 11A 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 Working Temperature Range of STKM 11A 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 Inspection Report for STKM11A Carbon Steel Tubes Wuxi Changchen Technology Co., Ltd , https://www.wxchangchen.com
Table of Contents
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
Number
Grade
ASTM Number
JIS
Mechanical
D 3517
Grade 11 A
STKM 11 A
A513
G-3445
MT1010
Flattening Test
Bending Test
Distance
between
that parts
(D=OD)Bend
AngleInside
Radius
(D=OD)
1/2D
180°
4D
STKM11A Contains 0.40% Silicon, Explore Physical Properties of STKM11A Steel Pipe
Density
kg/dm3Thermal Conductivity
W/mKTemperature T
°C/FSpecific Heat
J / kgK
371 (≥)
13
34
41
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%
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
Standard
ASTM A519
ASTM A513
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
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
Hardness
77 HRB
212 HBW
Smelting Temperature
1821°C – 1823°C
DIN 1.0034 Melting Range is 1480 – 1526 °C, Check Thermal Properties of ASTM A519 MT1010 Material
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
Temperature
1200°F [650°C]
View Creep Strength and Temperature Range of STKM11A Carbon Steel Material
Creep Strain
(10000h)
(Rp1,0) N/mm²Creep Rupture
(10000h)
(Rp1,0) N/mm²
141
922
Temperature Range
425 °C
Annealing
Quenching
Tempering
Normalizing
Q & T
√
√
√
√
√
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
Silicon
0.35%
Sulfur
0.040
Phosphorus
0.04 Max
Manganese
0.6 Max
Carbon
0.12 Max
Iron
98.8 to 99.25