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EN ISO 683-17 20CrMo4 vs BS 970 (Part 1) 708A25

Close Alternative — 83.2% match based on chemical composition and mechanical property overlap.

EN ISO 683-17 20CrMo4 (EN ISO 683-17:2014) and BS 970 (Part 1) 708A25 (BS 970 (Part 1):1983) are both steel grades. Both fall under the Alloy Steel category. EN ISO 683-17 20CrMo4 is typically used for used in gears, shafts, axles, high-tensile bolts, and structural components., while BS 970 (Part 1) 708A25 is commonly used for through hardening steel for mechanical and allied engineering purposes; supplied in the hardened and tempered conditions of table 6.. EN ISO 683-17 20CrMo4 is defined under European Standard (EN), originating from Europe, while BS 970 (Part 1) 708A25 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, EN ISO 683-17 20CrMo4 vs BS 970 (Part 1) 708A25 is a 83.2% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a close alternative overall at 83.2%.

Frequently Compared With EN ISO 683-17 20CrMo4:
NF A35-565 100C6 UNI 11234 100Cr6 GB/T 3077 12Cr2Ni4A GOST 4543 12HN3A IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 10Cr20Mo6 IS 4367 10Cr9Mo10 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 7) 10Cr36Mo10H IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 105Cr5
Match Breakdown
CHEMISTRY MATCH
83.2%
MECHANICAL MATCH
No shared data
OVERALL
83.2%
Specifications
Property EN ISO 683-17 20CrMo4 BS 970 (Part 1) 708A25
Standard EN ISO 683-17:2014 BS 970 (Part 1):1983
Category Alloy Steel Alloy Steel
C (%) 0.18-0.23 0.23-0.28
Mn (%) 0.60-0.90 0.50-0.80
Si (%) <=0.40 Not specified
P (%) <=0.035 <=0.035
S (%) <=0.035 <=0.040
Cr (%) 0.90-1.20 0.90-1.20
Mo (%) 0.15-0.25 0.15-0.25
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property EN ISO 683-17 20CrMo4 BS 970 (Part 1) 708A25
Tensile Strength 700-850 MPa Not specified
Yield Strength 500 MPa min Not specified
Elongation 14% min Not specified
Hardness 207-248 HB Not specified
Typical Applications
EN ISO 683-17 20CrMo4
Used in gears, shafts, axles, high-tensile bolts, and structural components.
BS 970 (Part 1) 708A25
Through hardening steel for mechanical and allied engineering purposes; supplied in the hardened and tempered conditions of Table 6.
Key Differences
Can EN ISO 683-17 20CrMo4 Be Substituted With BS 970 (Part 1) 708A25?
EN ISO 683-17 20CrMo4 and BS 970 (Part 1) 708A25 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.
Forms & Sizes Available on M-EX
EN ISO 683-17 20CrMo4
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5200–6400 mm (204.72–251.97 in)
BS 970 (Part 1) 708A25
No active listings currently.
On M-EX Right Now
EN ISO 683-17 20CrMo4
2 active listings and RFQs →
BS 970 (Part 1) 708A25
0 active listings and RFQs →
Frequently Asked Questions
What is the difference between EN ISO 683-17 20CrMo4 and BS 970 (Part 1) 708A25?
EN ISO 683-17 20CrMo4 specifies Si which is not specified for BS 970 (Part 1) 708A25.
Can EN ISO 683-17 20CrMo4 be substituted with BS 970 (Part 1) 708A25?
EN ISO 683-17 20CrMo4 and BS 970 (Part 1) 708A25 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.