34CrMo4 Seamless Pipe For CNG Cylinder Manufacturer 34CrMo4 Alloy Steel Tube 356*7.4 12m/pc
34CrMo4/1.7220/35CrMo Gas Cylinder Pipe – Mechanical Tubing – Seamless Alloy Steel Tube
Application
34CrMo4 Gas Cylinder Pipe, mainly used in automobile gas cylinder installation, fire protection, medical fields, industry equipment, etc.
Quality Standard
-EN 10297-1 Seamless Circular Steel Tubes for Mechanical and General Engineering Purpose
-GB/T 8162 Seamless Steel Tubes for Structural Purposes
Chemical Composition(%)
Steel Grade C Si Mn P S Cr Mo
34CrMo4 0.30-0.37 0.40 max 0.60-0.90 0.035 max 0.035 max 0.90-1.20 0.15-0.30
35CrMo 0.32-0.40 0.17-0.37 0.40-0.70 0.035 max 0.035 max 0.80-1.10 0.15-0.25
Mechanical Properties
Condition Tensile Strength Rm (Mpa) Yield Strength R2 (Mpa) Elongation in 2 in or 50 mm A(%)
Q+T 900 min 650 min 12 min
Dimensions Tolerance
| Outer Diameter Scope | Outer Diameter Tolerance | Wall Thickness/Outer Diameter ratio | Wall Thickness Tolerance | Length Scope | Length Tolerance |
| OD219mm max | ±1% or ±0.5 mm whichever is the greater | any | ±12.5% or ±0.4 mm whichever is the greater | 6000mm max | -0mm,+10mm |
| OD219mm min | ±1% | 0.025 max | ±20% | 6000mm-12000 | -0mm,+15mm |
| OD219mm min | ±1% | 0.025-0.050 | ±15% | 12000mm min | minus not allowed |
| OD219mm min | ±1% | 0.050 min | ±12.5% | / | / |
Capacity
3,000 ton per month.
Test
Chemical analysis, Metallographic, Mechnical analysis, Ultrasonic testing, Magnetic testing, Impact testing, Hardness testing, Surface quality and dimension report.
Package
Four or five pcs in one bunch, the minimum weight of each bundle is 2000kg; the maximum bundle weight being 5000kg.
Mill’s Test Certificate
EN 10204/3.1 with all relevant data reg. chem. composition, mech. properties and results of testing.
