The H-Lift Grade 30 Proof Coil Chain is a carbon steel, general-purpose welded chain manufactured to ASTM A413/A413M-21 standards, designed for everyday utility and basic load securement.
Represents the most economical and generic grade of welded steel chain available, commonly referred to in the industry as "proof coil."
Constructed from carbon steel, providing a reliable and cost-effective solution for light-duty commercial and industrial tasks.
Highly versatile for a wide range of everyday applications including logging, trucking tie-downs, railroad cars, construction, and playground equipment.
Strictly intended for static loads, barrier fencing, and general load binding; it is not recommended or approved for overhead lifting operations.
ASTM A413 | Low Carbon Steel | General Purpose Utility
The Grade 30 Proof Coil Chain is an economical, general-purpose welded chain manufactured from low-carbon steel. Designed to meet ASTM A413 specifications, it is highly versatile for tasks that do not require heavy lifting or high strength-to-weight ratios. It is the perfect choice for logging, trucking tie-downs, construction boundaries, and agricultural applications.
⚠️ SAFETY WARNING: NOT FOR OVERHEAD LIFTING. This chain is designed strictly for pulling, binding, and general securement. It is NOT rated for overhead lifting or the suspension of loads under any circumstances.
✅ Standard Compliance
Manufactured and thoroughly tested to meet the exact requirements of ASTM A413/A413M-21 for welded carbon steel chains, ensuring consistent commercial quality.
⚙️ Material Composition
Constructed from medium-strength carbon steel. As a low-carbon chain, it is the most economical grade of welded chain available for non-critical applications where alloy chains are not required.
🛡️ Corrosion Protection
Available in multiple surface treatments, including zinc plating, electro-galvanizing, or hot-dip galvanizing, providing excellent rust resistance for outdoor and marine environments.
🛠️ General Purpose Utility
Highly versatile for everyday tasks. Ideal for logging, light-duty trucking tie-downs, playground equipment, securing agricultural equipment, and marine anchoring.
⚙️ Related Products & Alternatives:
• Higher Strength: Need a stronger carbon chain specifically for transport tie-downs? View our Grade 70 Transport Chain. • Overhead Lifting: For overhead lifting applications, you must use our certified Grade 80 Alloy Chain. • Hardware: Connect your proof coil chain securely with our matching Commercial Shackles.
Technical Specifications
Refer to the table below for exact dimensional and load limits.
← Swipe table left and right to view all data →
Item No.
Nominal Size
Working Load Limit (Max)
Proof Load (Min)
Breaking Load (Min)
Weight per 100'
Inside Length (Max)
Inside Width (Min)
Product Code
inch
mm
kg
lbs
kN
lbs
kN
lbs
kg
lbs
inch
mm
inch
mm
C803004
1/8
4.0
190
420
3.78
580
7.56
1,700
8.8
19
0.89
22.6
0.29
7.4
708003004
C803005
3/16
5.5
360
800
7.11
1,600
14.20
3,200
18.3
40
0.95
24.1
0.40
10.2
708003005
C803007
1/4
7.1
600
1,320
11.80
2,650
23.60
5,300
32.7
72
1.00
25.4
0.50
12.7
708003007
C803008
5/16
8.7
910
2,000
17.80
4,000
35.60
8,000
48.0
106
1.10
27.9
0.50
12.7
708003008
C803010
3/8
10.3
1,270
2,800
24.90
5,600
49.80
11,200
70.3
155
1.23
31.2
0.62
15.7
708003010
C803013
1/2
13.5
2,190
4,800
42.90
9,650
85.80
19,300
123.0
271
1.53
38.9
0.80
20.3
708003013
C803016
5/8
16.7
3,350
7,400
65.80
14,800
131.60
29,600
184.0
405
1.90
48.3
1.00
25.4
708003016
C803019
3/4
19.8
4,700
10,400
92.50
20,800
185.00
41,600
264.0
582
2.15
54.6
1.12
28.4
708003019
C803023
7/8
23.0
6,350
14,000
124.50
28,000
249.00
56,000
368.0
811
2.50
63.5
1.37
34.8
708003023
C803026
1
26.5
8,400
18,600
165.40
37,200
330.80
74,400
474.0
1,045
2.75
69.9
1.50
38.1
708003026
Q: What does "Proof Coil" mean? [Image illustrating chain proof testing process in a factory] A: "Proof Coil" is an industry term for Grade 30 chain. It indicates that the chain has been "proof tested" (load-tested) during manufacturing to verify the structural integrity of the welds before it is sold. However, despite this testing, it remains a general-purpose, low-carbon chain.
Q: Can I use Grade 30 chain for overhead lifting?A: No. Grade 30 carbon steel chain is not designed, rated, or legally approved for overhead lifting. For any lifting or suspension operations, you must use Grade 80 or Grade 100 alloy steel chain.
Standard Specification for Carbon Steel Chain
Grades 30, 43, and 70 | Non-Overhead Lifting Applications
Abstract
This specification covers carbon steel chain for applications such as railroad cars, construction, industrial uses, load binding, and general purposes other than overhead lifting. The three classes of carbon steel chains covered include:
Grade 30: Proof Coil Chain
Grade 43: High Test Chain
Grade 70: Transport Chain
Dimensional requirements, mechanical testing (proof testing, breaking force, elongation), and testing frequency are defined herein.
1. Scope
1.1 This specification covers carbon steel chain for such applications as railroad cars, construction, industrial uses, load binding, and general purposes other than overhead lifting.
Note 1: This specification does not cover carbon steel chain for sprocket applications.
1.2 Three classes of carbon steel chain are covered:
1.2.1 Grade 30 — Proof coil chain.
1.2.2 Grade 43 — High test chain.
1.2.3 Grade 70 — Transport chain.
1.3 The chain grade is based on the nominal stress in the link at the design breaking force strength. It is calculated by taking the minimum breaking force load and dividing by two times the nominal cross-sectional area of the link.
1.4 The values stated in either SI units or in other units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.
1.4.1 Metric Units Grade = 1/10 of the minimum breaking force (kN) / (2 × nominal cross-sectional area in mm²) Formula: (MBF) / (0.005 × π × d²)
1.4.2 English Units Grade = 0.000689 of the minimum breaking force (lb) / (2 × nominal cross-sectional area in in²) Formula: (0.000689 × MBF) / (0.5 × π × d²)
1.4.3 MBF = minimum breaking force (lb or kN); d = chain diameter (in. or mm).
Note 2: The above formulas are for round diameter links only. If different cross sections are used, the actual cross section of the link would need to be calculated and used.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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