TORICH INTERNATIONAL LIMITED
| Standard | ASTM,DIN,GB,JIS,API |
| Technique | Cold Drawn,Hot Rolled,Cold Rolled,ERW,Hot Rolled/Cold Drawn |
| Payment Terms | L/C,D/A,D/P,T/T,Western Union,MoneyGram |
| Supply Ability | 60000 Ton/Tons per Year |
| Delivery Time | 20-30days upon products |
| Packaging Details | In bundles or in wooden boxes. |
| Outer diameter(round) | 30 - 325 mm, |
| Brand Name | TORICH |
| Model Number | Heavy Thick Wall Steel Tubing |
| Certification | ISO9001 ISO 14001 TS16949 |
| Place of Origin | Zhejiang/China |
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Product Specification
| Standard | ASTM,DIN,GB,JIS,API | Technique | Cold Drawn,Hot Rolled,Cold Rolled,ERW,Hot Rolled/Cold Drawn |
| Payment Terms | L/C,D/A,D/P,T/T,Western Union,MoneyGram | Supply Ability | 60000 Ton/Tons per Year |
| Delivery Time | 20-30days upon products | Packaging Details | In bundles or in wooden boxes. |
| Outer diameter(round) | 30 - 325 mm, | Brand Name | TORICH |
| Model Number | Heavy Thick Wall Steel Tubing | Certification | ISO9001 ISO 14001 TS16949 |
| Place of Origin | Zhejiang/China | ||
| High Light | seamless steel tube for auto parts ，precision steel tube 30-325mm OD ，steel tube 2-100mm thick | ||
STKM11A is a carbon (mild) steel grade under the JIS G 3445 standard, specified for seamless steel tubes used in machine structural applications. It is used for heavy thick-wall tubing in automotive parts and other mechanical components where strength, formability, and consistency are required.
| Parameter | Detail |
|---|---|
| Standard | JIS G 3445: Carbon steel tubes for machine structural purposes |
| Form | Seamless steel tubing (also hot-rolled or cold drawn depending on required precision) |
| Dimensions (Typical) | Outer Diameter (OD): ~6 mm to ~340 mm; Wall Thickness (WT): ~1 mm to ~50 mm |
| Delivery Conditions | Bright annealed or otherwise heat treated per JIS G3445; tolerances on OD and wall thickness per the standard |
Chemical composition limits under JIS G 3445 for STKM11A and related grades:
| Grade | C (max) | Si (max) | Mn (max or range) | P (max) | S (max) |
|---|---|---|---|---|---|
| STKM11A | 0.12 % | 0.35 % | 0.60 % | 0.040 % | 0.040 % |
| STKM12A | 0.20 % | 0.35 % | 0.60 % | 0.040 % | 0.040 % |
| STKM13A | 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 % |
Mechanical property minima for STKM11A and related grades from JIS G 3445:
| Grade | Tensile Strength (min) MPa | Yield/Proof Stress (min) MPa | Elongation (min) % | Notes on Formability / Bend / Flattening |
|---|---|---|---|---|
| STKM11A | 290 MPa | -- (some sources specify proof stress ~ not always declared) | 35 % | Must pass flattening test (half diameter), specific bend tests, straightness etc. |
| STKM12A | 340 MPa | 175 MPa | 35 % | Bend tests: 90° etc. |
| STKM13A | 370 MPa | 215 MPa | 30 % | More demanding flattening, bend radius, etc. |
| STKM13C | 510 MPa | 380 MPa | 15 % | Lower elongation but higher strength; suited where higher load, less deformation acceptable |
| STKM14A | 410 MPa | 245 MPa | 25 % | Intermediate grade between STKM13 and STKM15 in strength vs ductility |
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Importer,Exporter,Trading Company,Seller
Year Established:
1997
Total Annual:
25000000-30000000
Employee Number:
100~200
Ecer Certification：
Verified Supplier
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