GB/T 3639 TORICH Round Anti Rust Seamless Steel Pipes For Precision Applications
Product Details
seamless steel pipe
,seamless carbon steel tube
TORICH GB 28884 300L - 3000L Seamless Steel Tubes for Large Volume Gas Cylinder
Material:30CrMoE 42CrMoE 4130X 4142
Size Range:OD:80-1200mm
WT:4-100mm
General Length:4-12m
Tolerance:
According to the following tables or customers’ request.
| Category | Size | Tolerance |
| Outside Diameter(D) | - | ±1%D |
| Minimum Wall Thickness(Smin) | D≤559 | +25%Smin 0 |
| D>559 | +27.5%Smin 0 | |
| Wall Thickness(S) | D≤559 | +12.5%S -10%S |
| D>559 | ±12.5%S |
Mechanical Properties:
| Steel | Tensile Strength | Lower yield strength or specified plasticity elongation | percentage elongation after fracture | Yield ratio | Hardness | -40℃ Shock absorption energy | |
| Grade | HBW | KV2/ | |||||
| Ra / | ReL or Rp0.2a / | A50mma/ | (ReL/Ra orRp0.2/Ra)/% | J | |||
| MPa | MPa | % | Average | Single Sample | |||
| 30CrMoEb | ≥720 | ≥485 | ≥20 | ≤86 | ≤269 | ≥40 | ≥32 |
| 42CrMoEc | ≥930 | ≥760 | ≥16 | - | ≤330 | ≥40 | ≥32 |
| Grade 30CrMoE mechanical property is equivanlent to 4130X | |||||||
| Grade 42CrMoE mechanical property is equivanlent to 4142 | |||||||
Chemical Compositions:
| Steel Grade | Tensile Strength Ra / MPa | Lower yield strength or specified plasticity elongation ReL or Rp0.2a / MPa | percentage elongation after fracture A50mma/ % | yield ratio (ReL/Ra or Rp0.2/Ra)/ % | Hardness HBW | -10℃Shock absorption energy KV2/ J | |
| Average | Single Sample | ||||||
| 30CrMoEb | ≥720 | ≥485 | ≥20 | ≤86 | ≤269 | ≥40 | ≥32 |
| 42CrMoEc | ≥930 | ≥760 | ≥16 | - | ≤330 | ≥40 | ≥32 |
Characteristic:
TORICH QUALITY ASSURANCE
Good surface quality
Good OD and ID tolerance controlled to Technical Standard
Stable quality
100% Eddy Current Test
Processing:
Technical Delivery Conditions:Steel pipe in hot rolling(enlarge) state,cold drawn or cold drawn after heat treatment state delivery.
Widely used in the field of:Manufacturing gas cylinder with 300L~3000L volume
Product Images:
QUALITY CONTROL
1~ Incoming Raw Material Inspection
2~ Raw Material Segregation to avoid steel grade mix-up
3~ Heating and Hammering End for Cold Drawing
4~ Cold Drawing and Cold Rolling, on line inspection
5~ Heat Treatment, +A, +SRA, +LC, +N, Q+T
6~ Straightening-Cutting to specified length-Finished Measuring Inspection
7~ Machanical Testing in own labs with Tensile Strength, Yield Strength, Elongation, Hardness, Impact, Mictrostruture etc
8~ Packing and Stocking.
100% of our steel tubes are dimensionally checked
100% of our steel tubes are visually checked to assure they have a perfect surface condition and no surface defects.
100% eddy current test and ultrosonic test to eliminate longitudinal and transversal defects.
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