25crmo4 1.7218 +Qt Mechanical Alloy Steel Tube

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25crmo4 1.7218 +Qt Mechanical Alloy Steel Tube

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Product Description

Basic Information

Model NO.:

25crmo4

Technique:

Hot-Rolled+Cold-Drawn

Material:

Alloy Steel

Surface Treatment:

as Required

Usage:

for Oil Equipment

Section Shape:

Round

Cutting Service:

Available

Mtc:

3.1 or 3.2 Certificate

Delivery Condition:

N, Q, T

Transport Package:

Seaworthy Standard Package

Specification:

30-850mm

Origin:

China

HS Code:

7304192000

Production Capacity:

50000tons/Year

Product Description

25CrMo4 1.7218 Mechanical Tubes

AISI or SAE 4130 grade is a low-alloy steel containing chromium and molybdenum as strengthening agents. The steel has good strength and toughness, weldability and machinability.

AISI/SAE 4130 grade is a versatile alloy with good atmospheric corrosion resistance and reasonable strength. It shows good overall combinations of strength, toughness, and fatigue strength.

Standards

EN 10216-2: 2014 Seamless steel tubes for pressure purposes. Non-alloy and alloy steel tubes with specified elevated temperature properties.
EN 10305-1: 2010 Steel tubes for precision applications. Seamless cold drawn tubes.
EN 10297-1: 2003 Seamless circular steel tubes for mechanical and general engineering purposes.

Equivalent Grades

EU (EN)	USA (SAE)	Germany (DIN)	Japan (JIS)	France (AFNOR)	England (BS)	Italy (UNI)
25CrMo4	SAE 4130	25CrMo4	SCM420	25CD4	708A25	25CrMo4

Chemical Composition

Grade	C	Mn	P	S	Si	Cr	Mo
4130	0.28-0.33	0.40-0.60	0.035	0.040	0.15-0.35	0.80-1.10	0.15-0.25
25CrMo4 / 1.7218	0.22-0.29	0.60-0.90	0.025	0.035	<=0.40	0.90-1.2	0.15-0.30
SCM430 / SCM2	0.28-0.33	0.60-0.85	0.030	0.030	0.15-0.35	0.90-1.2	0.15-0.30

Technical Parameters

Standard: ASTM A519
Grade: 1020, 1045, 4130, 4140
Tolerance: ±0.05
Process: Cold Rolled / Cold Drawn
Delivery Condition: Cold worked, Annealed, Normalized, Stress Relieved, etc.
Certifications: BV, SGS

Dimensions and Tolerances

Outer diameter: 21 to 426 mm, wall thickness: 2 to 50 mm, length: Not more than 12 m.

Packaging & Services

Package: All pipes shall be marked, coated with oil and capped with plastic end protectors. All items shall be plain end.

Our Services: Third Party inspection acceptable (SGS, BV, etc.). Supplying financial support with usance L/C 180 days after B/L date.

Tests Applied to Tubes

Chemical Composition Analysis
Mechanical Properties (Tensile, Yield, Elongation, Hardness)
Technological Test (Flattening, Flaring, Bending, Hydraulic Pressure)
Surface Quality Detection
Eddy-current Examination
Visual Test

Frequently Asked Questions (FAQ)

Q1: What are the primary characteristics of 25CrMo4 alloy steel tubes? A1: 25CrMo4 (4130) is a low-alloy steel known for its high strength, toughness, and excellent weldability. It also offers good atmospheric corrosion resistance and fatigue strength.

Q2: Which international standards do these mechanical tubes comply with? A2: Our tubes comply with major standards including EN 10216-2 for pressure purposes, EN 10305-1 for precision applications, and ASTM A519 for mechanical engineering purposes.

Q3: What size range is available for the 25CrMo4 tubes? A3: We provide tubes with an outer diameter ranging from 21mm to 426mm and wall thicknesses from 2mm to 50mm, with lengths up to 12 meters.

Q4: What delivery conditions can be requested? A4: Available delivery conditions include Cold Worked (C), Stress Relieved (SR), Annealed (A), and Normalized (N).

Q5: How do you ensure the quality of the steel tubes? A5: We perform rigorous testing including chemical analysis, mechanical property testing (tensile/yield), technological tests (flattening/flaring), and surface inspections like eddy-current and visual tests.

Q6: Are third-party inspections allowed before shipment? A6: Yes, we fully support and accept third-party inspections from reputable agencies such as SGS and BV to ensure compliance with your requirements.

25crmo4 1.7218 +Qt Mechanical Alloy Steel Tube

Product Description

Basic Information

Product Description

25CrMo4 1.7218 Mechanical Tubes

Standards

Equivalent Grades

Chemical Composition

Technical Parameters

Dimensions and Tolerances

Packaging & Services

Tests Applied to Tubes

Frequently Asked Questions (FAQ)

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