1. for making ductile iron pipes DN50-DN1200 2. material: 21CrMo10/35CrMo to DIN17350 3. long lifetime 4.length upon request

The material of pipe molds is 21CrMo10 and 30CrMo to DIN17350, and size DN50-DN1200.  they are used for producing ducitle iron pipes basd on centrifugal machines. 

 

The main technical specification of the pipe moulds are as per follows: 

 

1.Material 

 21CrMo10 and 35CrMo to DIN17350

 

2. Chemical Components

 21CrMo10

Components	C	Mn	Si	P	S	Cr	Mo	Cu
	0.16 0.23	0.20 0.40	0.20 0.40	≤ 0.011	≤ 0.009	2.20 2.60	0.30 0.50	≤ 0.20

 

35CrMo

Components	C	Mn	Si	P	S	Cr	Mo
	0.32 0.40	0.40 0.70	0.17 0.37	≤ 0.025	≤ 0.015	0.80 1.10	0.15 0.25

 

3.smelting method

electric arc furnace + refining furnace(vacuum arc degassing)

4. Technical parameters of machining

Spec. (ID mm)	Length m	surface roughness	Precision mm	Concentricity mm	Conicity mm
100~1200	6.5	1.6	0.1	0.08	0~1

 

5. Mechanical properties(according to DIN17350, DIN 21CrMo10)

σb	σs	σ5	Ψ	Hardness
750~850N/mm2	≥650N/mm2	≥16%	≥60%	225 — 265HB

 

6. Test method and standard

Test spots: half spot of wall thickness,two portraits of such spot.

Tensile test: GB/T288-2002 standard.

Hardness test: GB/T231 standard.

 

7. The standard of ultrasonic test

The forging of the mould will be ultrasonically tested as per JB/T1581-1996 or equivalent standard, details as follows:

a. Without bursts, crack, shrinking hole and other defects.

b. The defect with size within 2mm can be ignored.

c. There should not have compact district.

d. Individual defect with diameter of 2~4mm is permitted, and the distance of the neighboring defects should be more than the 10 times of the bigger one’s. For 100cm2’ s area, the quantities of the defects with diameter of 2~4mm should not exceed 3.

The above-mentioned parameters are for reference only,we can produce various kinds of pipe mold as per customers’ requirements.

 

8. Package

By crate adapted to seaway

 

9. Work life

(according to DIN17350, DIN 21CrMo10)

Spec. (MM)	Unit	Minimum qty of producing pipes
DN80	pc	4000
DN100	pc	4000
DN150	pc	3500
DN200	pc	3000
DN250	pc	3000
DN300	pc	3000
DN350	pc	2500
DN400	pc	1500
DN450	pc	1500
DN500	pc	1200
DN600	pc	1200
DN700-DN1200	pc	800

 

 

 

centrifugal casting pipe mould for ductile iron pipes