Product Details

A special steel enterprise specializing in the production, research and development and sales of high alloy steel forgings

Pipe Die

Key words:

Classification:

Precision Forged Pipe Die

Hotline:

0391-2187118

Consulting

Introduction of Pipe Mould

1、 Process Flow Chart

Steelmaking → Refining → Forging → NDT → Heat Treatment → NDT → Finish Machining → NDT → Consignments

Steelmaking Process: EBT + LF/VD

Forging Equipment: Hydraulic press or precision forging machine (one-step forging forming)

Non-destructive Testing Standard: JB/T 1581-96 Ultrasonic Flaw Detection

Heat Treatment: Quenching and tempering (quenching + tempering) + stress relief treatment

Finish Machining Equipment: CNC lathe

2、 Product Overview

We provide T-tube-type water-cooled metal molds, S-type, N-type and K-type thermal tube molds made from 15Cr2Mo, 21CrMo10 and 30CrMo. The product size ranges from DN80 to 1200mm with a length of 3-6m, and the annual production capacity is 2000 pieces for various ductile iron pipe moulds. With the same service life as products made in America and Germany.

3、 Process Features

Our company leverages unique forging equipment, adjusts element content, and strengthens process control. During steel melting, we strictly control the contents of S, P, H, O, and limit harmful elements such as Pb, Sn, Bi as required by customers. We adopt bottom pouring for ingot casting and optimize the shrinkage ratio of large ingots to ensure steel purity and compactness, reducing nonmetallic inclusions. Inclusion testing is conducted in accordance with GB/T10561-2005, and the rating of A, B, C, D types shall be ≤2.0 (judged by the worst case).

4、 Chemical Composition (mass %)

牌号 Grade	碳 C	硅 Si	锰 Mn	铬 Cr	钼 Mo	镍 Ni	铜 Cu	磷 P	硫 S
15Cr2Mo	0.12-0.18	0.17-0.37	0.40-0.70	2.30-2.60	0.40-0.55	<0.35	<0.15	<0.009	<0.009
21CrMo10	0.16~0.23	0.20~0.40	0.20~0.40	2.20~2.60	0.30~0.50	<0.50	<0.15	<0.009	<0.009
30CrMo	0.23-0.30	0.17-0.37	0.40-0.70	0.80-1.10	0.15-0.25	<0.50	<0.15	<0.009	<0.009

Note: The contents of harmful elements such as lead, arsenic, tin, antimony, bismuth can be controlled according to the purchaser's requirements.

5、 Mechanical Property

牌号 Grade	抗拉强度 Rm (MPa)	屈服强度 Rp0.2 (MPa)	延伸率 A (%)	断面收缩率 Z (%)	冲击功 Akv (J)	布氏硬度 HBW
15Cr2Mo	780	>680	>12	>50	>78	>230
21CrMo10	780	>650	>16	>60	>78	>240
30CrMo	780	>680	>10	>35	>21	>200

Note: The maximum hardness difference for the full-length pipe mould shall be no more than 40HBW.

6、 The Size of T-tube-type Water-cooled Metal Mold (mm)

管径 DN	L1	L2	L3	D1	D2	D3	D4	D5	D6	重量 (kg)
80	6287	27	6129	270	205	164.7	97.2	164	183	530
100	6287	27	6129	270	205	164.7	116.8	164	183	400
150	6287	27	6129	325	266	217	168.9	209	209	605
200	6287	27	6129	385	325	281	221.1	261	288	764
250	6287	27	6129	455	385	336	273.4	320	340	1112
300	6287	27	6129	520	443	393.9	325.2	376	387	1434
350	6341	37	6169	575	495	448	378	444	450	2045
400	6341	37	6169	615	550	502	429	494	502	2416
500	6341	37	6169	755	663	606.5	532.1	608	610	3557
600	6348	44	6169	850	790	716.1	635.3	715	730	4274
700	6348	44	6169	970	902	828	738.5	828	835	5838
800	6600	118	6180	1148	1013	948.4	843.5	940	930	7269
900	6600	181	6180	1258	1123	1058	947.5	1063	1060	9800
1000	6600	181	6180	1350	1233	1165	1051	1166	1160	10516
1200	6435	44	6281	1585	1447	1388	1257	1375	1372	12675