• JIS G3445 Stkm12b Carbon Steel Bearing Tubes
  • JIS G3445 Stkm12b Carbon Steel Bearing Tubes
  • JIS G3445 Stkm12b Carbon Steel Bearing Tubes
  • JIS G3445 Stkm12b Carbon Steel Bearing Tubes
  • JIS G3445 Stkm12b Carbon Steel Bearing Tubes
  • JIS G3445 Stkm12b Carbon Steel Bearing Tubes

JIS G3445 Stkm12b Carbon Steel Bearing Tubes

Type: Seamless
Technique: Cold Drawn
Material: Carbon Steel
Surface Treatment: Oiled
Usage: Boiler Pipe, Hydraulic/Automobile Pipe, Food/Beverage/Dairy Products, Machinery Industry, Special Purpose
Section Shape: Round
Samples:
US$ 1/Piece 1 Piece(Min.Order)
| Request Sample
Customization:
Diamond Member Since 2011

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Guangdong, China
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Basic Info.

Model NO.
KM-20200902
Transport Package
in Bundles or Wooden Cases
Specification
19.05mm - 114.3mm
Trademark
KINGMETAL
Origin
China
HS Code
7306309000
Production Capacity
1000 Tons Per Month

Product Description

JIS G3445 STKM12B Carbon Steel Bearing Tubes

Standard Specification of JIS G3445 Carbon Steel Seamless Tube :

Standard JIS G3445
Grade STKM11,STKM12,STKM13,STKM14,STKM15,STKM16,STKM17,STKM18,STKM19,STKM20
Outer Dimensions 19.05mm - 114.3mm
Wall Thickness 2.0mm - 14 mm
Length max 16000mm

Packing: Bare/bundles/crates/crate protection at the both sides of tubes or as per customers' requirements .
 

Price of JIS G 3445 STKM Carbon Steel Pipes & Tubes

  • JIS G 3445 Pipes and Tubes US $880~1000 / Ton
  • JIS G 3445 STKM12A Seamless Tubes
    US $900-1000 / Ton
  • Carbon Steel JIS G3445 STKM13B Tubes
    US $900-1000 / Ton
  • JIS G 3445 STKM13C Seamless Tubes
    US $900-1000 / Ton
  • JIS G 3445 STKM13B Seamless Tubes
    US $2500-3000 / Ton
  • Carbon Steel JIS G 3445 12B Tube
    US $900-1000 / Ton
  • Manufacturer of JIS G 3445 Seamless Steel Tube US $900-1000 / Ton
  • JIS G 3445 STKM Steel Tube
    US $900-1000 / Ton
  • JIS G 3445 STKM15A Carbon DOM Steel Tubes
    US $900-1200 / Ton
  • STKM13C/STKM12B Steel Tube
    US $900-1200 / Ton
  • STKM12B Carbon Steel Bearing Tubes
    US $900-1200 / Ton
  • St52-3 JIS G3445 seamless steel tube
    US $900-1200 / Ton
  • JIS G 3445 STKM15 Seamless Steel Tube
    US $900-1200 / Ton
  • JIS G 3445 steel tube
    US $900-1200 / Ton
  • Seamless JIS G 3445 STKM Tube
    US $900-1200 / Ton
Chemical Compositions(%):
Grade C Si Mn P S
STKM11A ≤0.12 ≤0.35 ≤0.60 ≤0.040 ≤0.040
STKM12A ≤0.20 ≤0.35 ≤0.60 ≤0.040 ≤0.040
STKM12B ≤0.20 ≤0.35 ≤0.60 ≤0.040 ≤0.040
STKM12C ≤0.20 ≤0.35 ≤0.60 ≤0.040 ≤0.040
STKM13A ≤0.25 ≤0.35 0.30-0.90 ≤0.040 ≤0.040
STKM13B ≤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
STKM14B ≤0.30 ≤0.35 0.30-1.00 ≤0.040 ≤0.040
STKM14C ≤0.30 ≤0.35 0.30-1.00 ≤0.040 ≤0.040

Appearance

  • The tubes shall be practically straight. and the two ends shall be at right angles to the axis of the tube
  • The tubes shall be free from defects detrimental to practical use.
  • The surface finish of the tubes, when especially specified shall be agreed upon by the purchaser and the manufacturer.
Mechanical Properties:
Grade Yield Strength (Mpa) Tensile Strength (Mpa) Elongation (%)
STKM11A \ ≥290 ≥35
STKM12A ≥175 ≥340 ≥35
STKM12B ≥275 ≥390 ≥25
STKM12C ≥355 ≥470 ≥20
STKM13A ≥215 ≥370 ≥30
STKM13B ≥305 ≥440 ≥20
STKM13C ≥380 ≥510 ≥15
STKM14A ≥245 ≥410 ≥25
STKM14B ≥355 ≥500 ≥15
STKM14C ≥410 ≥550 ≥15

The tubes shall be manufactured by seamless process, electric resistance welding process, or butt welding process, and those of other grades shall be manufactured by seamless process or electric resistance welding process. The tube shall be as manufactured or as cold-finished condition, or they shall be subjected to appropriate heat treatment.

Grade and Designation

The grade and designation of the tube shall be as given as follows table.

Grade Designation
Grade 11 A STKM 11A
Grade 12 A STKM 12A
B STKM 12B
C STKM 12C
Grade 13 A STKM 13A
B STKM 13B
C STKM 13C
Grade 14 A STKM 14A
B STKM 14B
C STKM 14C
Grade 15 A STKM 15A
C STKM 15C
Grade 16 A STKM 16A
C STKM 16C
Grade 17 A STKM 17A
C STKM 17C
Grade 18 A STKM 18A
B STKM 18B
C STKM 18C
Grade 19 A STKM 19A
C STKM 19C
Grade 20 A STKM 20A

The sub classification letter symbols A, B and C are used to indicate distinction of method of manufacturing the tube, cold working process, heat treatment, etc.

World standard Comparative with JIS G3445
NUBER GRADE NUBER GRADE NUBER GRADE NUBER GRADE
D 3517 Grade 11 A STKM 11 A A513 MT1010 G-3445 STKM11A - -
A519 MT1010
  Grade 12A STKM 12 A A513 MT1015   STKM12A 980 CDS-3
A519 MT1015
  Grade 12 B STKM 12 B - -   STKM12B - -
  Grade 12C STKM 12C A512 MT1015   STKM12C - -
A513
  Grade 13 A STKM 13 A A512 MT  1025   STKM13A - -
A513 MTX1025
A519  MT  1025
  Grade13B STKM 13 B - -   STKM13B 980 CDS-4
  Grade13 C STKM 13 C - -   STKM13C - -
  Grade14 A STKM 14 A A513 MT1030   STKM14A 1717 CDS-103
A519 MT1030
  Grade14 B STKM 14 B - -   STKM14B - -
  Grade14 C STKM 14 C - -   STKM14C - -
  Grade15 A STKM 15 A A513 MT1033   STKM15A 1717 CDS-105
  Grade15 C STKM 15 C - -   STKM15C - -
  Grade16 A STKM 16 A A519 MT1040   STKM16A 980 CDS-5
  Grade16 C STKM 16 C - -   STKM16C - -
  Grade17 A STKM 17 A A519 MT1050   STKM17A 980 CDS-7
1717 CDS-107
  Grade17 C STKM 17 C - -   STKM17B - -
  Grade18 A STKM 18 A A519 MT1524   STKM18A 980 CDS-9
  Grade18 B STKM 18 B - -   STKM18B - -
  Grade18 C STKM 18 C - -   STKM18C - -
  Grade19 A STKM 19 A - -   - - -
  Grade19 C STKM 19 C - -   - - -
  Grade20 A STKM 20 A - -   - - -

The tubes shall be practically straight. and the two ends shall be at right angles to the axis of the tube. The tubes shall be free from defects detrimental to practical use.

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

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