JIS B8812 Grade 80 T-DAT-DT Hoist Chain

TOPONE® case-hardened chain for chain hoists. Produced and tested to Japanese standards.Tight tolerances

Introduction

TOPONE® surface carburizing process and servo high-precision correction machine ensure the chain is wear-resistant and has precise dimensions with small tolerances. It can be sold in barrels or in bulk in any length.

Parameter

Lifting chain drawings

Dimension

Diameter		Inside Length		Inside Width	Outside Width	Inner Length		Weight
d	Tolerance	p	Tolerance	b1	b2	11xp	Tolerance	(kg/m)
(mm)	(mm)	(mm)	(mm)	(mm)	(mm)	(mm)	(mm)	(kg/m)
4	+0.08/-0.24	12.0	+0.23/-0.00	4.8	13.4	132.0	+0.60/-0.00	0.35
5	+0.10/-0.30	15.0	+0.29/-0.00	6.0	16.8	165.0	+0.79/-0.00	0.54
5.6	+0.11/-0.34	17.0	+0.33/-0.00	6.8	18.8	187.0	+0.90/-0.00	0.68
6.3	+0.13/-0.38	19.0	+0.35/-0.00	7.7	21.1	209.0	+1.00/-0.00	0.86
6.3	+0.00/-0.10	19.1	+0.20/-0.20	7.4	20.8	210.1	+0.50/-0.50	0.85
7.1	+0.14/-0.10	20.2	+0.20/-0.20	8.0	23.2	222.2	+0.50/-0.50	1.10
7.1	+0.14/-0.43	21.0	+0.40/-0.00	8.6	23.9	231.0	+1.10/-0.00	1.10
7.9	+0.00/-0.10	23.0	+0.20/-0.20	9.0	25.9	253.0	+0.60/-0.60	1.35
8	+0.16/-0.48	24.0	+0.45/-0.00	9.6	26.8	264.0	+1.20/-0.00	1.40
9	+0.18/-0.54	27.0	+0.52/-0.00	11.0	30.2	297.0	+1.43/-0.00	1.75
9.5	+0.10/-0.10	28.6	+0.20/-0.20	11.0	31.3	314.6	+0.75/-0.75	1.90
10	+0.20/-0.60	30.0	+0.55/-0.00	12.1	33.5	330.0	+1.55/-0.00	2.20
11.1	+0.00/-0.40	33.3	+0.20/-0.20	12.7	36.4	366.3	+0.85/-0.85	2.65
11.2	+0.22/-0.67	34.0	+0.65/-0.00	13.6	37.5	374.0	+1.75/-0.00	2.70
12.5	+0.25/-0.75	38.0	+0.70/-0.00	15.2	42.0	418.0	+2.00/-0.00	3.40
12.7	+0.00/-0.10	36.0	+0.20/-0.20	14.2	41.4	396.0	+0.95/-0.95	3.55
14	+0.28/-0.84	42.0	+0.80/-0.80	17.5	47.4	462.0	+2.20/-0.00	4.25

Mechanical Properties

Diameter	Hardness			Working Load Limit			Proof Load	Breaking Load
d	T	DAT	DT	T	DAT	DT	MPL	MBL
(mm)	(HV)	(HV)	(HV)	(ton)	(ton)	(ton)	(KN)	(KN)
4	320HV₅	500HV₅	550HV₅	0.5	0.4	0.25	12.6	20.1
5	320HV₅	500HV₅	550HV₅	0.8	0.63	0.4	19.6	31.4
5.6	320HV₅	500HV₅	550HV₅	0.8	0.63	0.4	19.6	31.4
6.3	320HV₅	500HV₅	550HV₅	1.1	0.9	0.56	28.3	45.2
6.3	320HV₅	500HV₅	550HV₅	1.1	0.9	0.56	28.3	45.2
7.1	320HV₁₀	500HV₁₀	550HV₁₀	1.5	1.2	0.75	38.5	61.6
7.1	320HV₁₀	500HV₁₀	550HV₁₀	1.5	1.2	0.75	38.5	61.6
7.9	320HV₁₀	500HV₁₀	550HV₁₀	1.5	1.2	0.75	38.5	61.6
8	320HV₁₀	500HV₁₀	550HV₁₀	2.0	1.6	1.0	50.3	80.4
9	320HV₁₀	500HV₁₀	550HV₁₀	2.5	2.0	1.25	63.6	102
9.5	320HV₁₀	500HV₁₀	550HV₁₀	2.5	2.0	1.25	63.6	102
10	320HV₁₀	500HV₁₀	500HV₁₀	3.2	2.5	1.6	78.5	126
11.1	320HV₁₀	500HV₁₀	550HV₁₀	3.5	3.0	1.9	95	152
11.2	320HV₁₀	500HV₁₀	550HV₁₀	3.5	3.0	1.9	95	152
12.5	320HV₁₀	500HV₁₀	550HV₁₀	4.5	3.6	2.2	113	181
12.7	320HV₁₀	500HV₁₀	550HV₁₀	4.5	3.6	2.2	113	181
14	320HV₁₀	500HV₁₀	550HV₁₀	6.0	5.0	3.0	154	246

Work Load Limit (WLL) is the maximum load which the chains are designed to sustain in lifting use. The mean stress at this load is 200N/MM² (MPA) and is based on a 4:1 factor of safety.
Manufacturing Proof Force (MPF) is the force to which during manufacture the chain is subjected to. The mean stress at this load is 500N/MM² (MPA) which is 2.5 times the working load limit.
Minimum Breaking Load (MBL) is the minimum force of which the chain must withstand before failure. The mean stress at this load is 800N/MM² (MPA). The minimum elongation before failure is 10%.

Standards

！This product is not recommended for overhead lifting. It is strictly prohibited to use it in excess of the working load (WLL).

！Any surface coating will affect the mechanical properties of the chain.Please ask staff for details.

We follow standards：

EN 818-1

JIS B8812

Optional surface treatment: natural black, black electrophoresis, electro-galvanizing, Dacromet.

Ambient temperature during use:

Min.: -40 ℃

Max.: 200 ℃

DAT:

Min.: -30 ℃

Max.: 200 ℃

DT:

Min.: -15 ℃

Max.: 200 ℃

If the application scenario exceeds or is lower than the recommended operating temperature, please consult the staff to see if it is feasible.

Q & A

JIS B8812 Grade 80 T-DAT-DT Hoist Chain

Dimension

Mechanical Properties

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