DIN1630 ST37.4 ST52.4 precision steel tube

Name: DIN1630 ST37.4 ST52.4 precision steel tube

Standard: DIN1630 DIN2445 EN1030-4 DIN2391-C

Type: Cold rolled/cold drawn

Grade: ST37.4 ST44.4 ST52.4

Size: OD4mm-219mm WT0.5mm-25mm

Condition: BK/NBK/GBK etc.

Mill Test Certificate: EN10204 3.1

Processing: Bending/ Cutting/Flattening/Flaring

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Product Detail

Product Tags

DIN1630 St37.4 St52.4 is a type of carbon steel seamless cold drawn hydraulic steel tube that is widely used in various hydraulic and pneumatic systems. It is known for its high precision, excellent performance, and reliable durability.

Description

Sample characteristic Introduction

Chemical Composition

Steel Grade		C	Si	Mn	P	S	Al
Name	No.	max	max	max	max	max	max
ST37.4	1.0308	0.17	0.35	0.4（min）	0.025	0.025	—
ST44.4	1.0408	0.21	0.35	0.4（min）	0.025	0.025	—
ST52.4	1.058	0.22	0.55	1.6	0.025	0.025	—

Mechanical properties

Condition	Materail Grade	T.S (MPa)	Y.S (MPa)	Elongation(%)
BKS	ST37.4	≥420	≥315	≥14
BKS	ST44.4	≥520	≥375	≥12
BKS	ST52.4	≥580	≥420	≥10
GBK	ST37.4	≥315		≥35
GBK	ST44.4	≥390		≥32
GBK	ST52.4	≥490		≥30
NBK	ST37.4	340-470	≥235	≥32
NBK	ST44.4	440-570	≥255	≥30
NBK	ST52.4	490-630	≥335	≥28

Quality assurance

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. Mechanical Testing in own labs with Tensile Strength, Yield Strength, Elongation, Hardness, Impact,

Microinstruction etc

8. Packing and Stocking

Application

DIN1630 hydraulic steel tube is commonly used in various hydraulic and pneumatic systems, such as in hydraulic cylinders, hydraulic lines, and other high-pressure applications.

It is widely used in industries such as automotive, aerospace, construction, and machinery, where precision and reliability are crucial for seamless operation.