Ordering Guide-Dongguan Fengzhuo Hardware Products Co., Ltd

Dongguan Fengzhuo Hardware Products Co., Ltd

CONTACT：Mr. Li

E-MAIL：896046301@qq.com

MOB：Mr. Li 86+13650393001

TEL：0769-81580737

WeChat：frank2016li

Ordering Guide

Home Ordering Guide Ordering Guide

(1) Casting process (OEM method for undertaking casting):

Customers provide drawings and samples → Review, evaluate, and communicate with customers → Sign business contracts → Draw casting drawings for engineering → Customers confirm drawings → Design and manufacture wax injection molds → Sample production → Customers confirm casting samples → Samples are qualified (if unqualified, correct the mold and make samples until qualified) → Customer orders → Production plan → Wax injection → Shell making → Melting casting → Crushing shell → Cutting → Grinding water mouth → Acid washing →

Rolling polishing → Inspection → Unqualified casting repair → Qualified product packaging → Qualified product shipment (Scrap return to furnace)

(2) Production cycle (OEM casting);

Customer provides drawings and samples for review and quotation, and communicates with the customer for 1 day

Engineering drawing of castings takes 1-3 days (depending on the difficulty of the drawing)

Making wax injection molds takes 2-9 days (depending on the difficulty of the sample)

Sample production takes 3-10 days (depending on the difficulty level of the sample)

Purchase order 7-35 days (depending on monthly production situation and quantity of purchase orders)

(3) Limitation of casting scope:

The weight of the casting ranges from 5 grams to 40 kilograms.

The wall thickness of the casting is greater than 1.8mm, and a minimum of 0.5mm can be applied locally.

The contour size of the casting is greater than 450mm. The surface roughness ranges from 1.6 to 6.4

(4) Dimensional tolerances for German investment castings (VDG P690) Class D2

From	0	6	10	14	18	24	30	40	50	65	80
To	10	10	14	18	24	30	40	50	65	80	100
D1	±0.10	±0.12	±0.15	±0.20	±0.25	±0.30	±0.37	±0.44	±0.52	±0.60	±0.68
D2	±0.08	±0.10	±0.12	±0.14	±0.17	±0.20	±0.25	±0.30	±0.38	±0.46	±0.53
D3
From	100	120	140	160	180	200	225	250	280	315	355
To	120	140	160	180	200	225	250	280	315	355	400
D1	±0.76	±0.84	±0.92	±1.02	±1.12	±1.28	±1.44	±1.64	±1.84	±2.10	±2.40
D2	±0.60	±0.65	±0.72	±0.80	±0.88	±0.95	±1.05	±1.15	±1.25	±1.40	±1.60
D3	±0.33	±0.36	±0.38	±0.42	±0.43	±0.47	±0.51	±0.56	±0.63	±0.71	±0.80

(5) Machining allowance for castings (refer to Japanese investment casting standards)

Size	0~40	40~63	63~100	100~160	160~250	250~400	400~630
Margin	≤0.4	0.4	0.7	1.1	1.4	1.4	2.2

(6) Our current casting material standards are:

	C	Si	Mn	S	P	Cr	Ni	Mo	Other
316	≤0.08	≤1.00	≤2.00	≤0.040	≤0.030	10.0-14.0	16.0-18.0	2.0-3.0
316L	≤0.03	≤1.00	≤2.00	≤0.045	≤0.030	10.0-14.0	16.0-18.0	2.0-3.0
304	≤0.08	≤1.00	≤2.00	≤0.045	≤0.030	8.0-10.5	18.0-20.0
430	≤0.12	≤1.00	≤1.00	≤0.040	≤0.030	≤0.75	16.0-18.0	≤0.50
420	0.16-0.24	≤1.00	≤0.06	≤0.040	≤0.030		12.0-14.0
ZG200-400	≤0.20	≤0.50	≤0.80	≤0.040	≤0.040
ZG310-570	≤0.50	≤0.60	≤0.90	≤0.040	≤0.045
ZG40CrMo	0.35-0.45	0.20-0.80	0.70-1.00	≤0.040	≤0.030		0.80-1.10	0.15-0.25
ZG40Cr	0.35-0.45	0.20-0.40	0.50-0.80	≤0.030	≤0.030		0.80-1.10	≤0.15
8620	0.15-0.25	0.20-0.80	0.65-0.95	≤0.040	≤0.045	0.4-0.70	0.40-0.70	0.15-0.25
8650	0.45-0.55	0.20-0.80	0.65-095	≤0.040	≤0.045	0.40-0.70	0.40-0.70	0.15-0.25
17-4	≤0.07	≤1.00	≤0.70	≤0.035	≤0.030	3.60-4.60	15.5-17.70		2.5-3.20 Cu