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EN 10083-1 50CrMo4 vs BS 970 (Part 1) 708A37

Close Alternative — 78.9% match based on chemical composition and mechanical property overlap.

EN 10083-1 50CrMo4 (EN 10083-1:1991) and BS 970 (Part 1) 708A37 (BS 970 (Part 1):1983) are both steel grades. Both fall under the Alloy Steel category. EN 10083-1 50CrMo4 is typically used for quenched and tempered machine parts; non alloy steels also normalized (clause 1), while BS 970 (Part 1) 708A37 is commonly used for used for gears, shafts, studs, machine spindles, crankshafts, and automotive components.. EN 10083-1 50CrMo4 is defined under European Standard (EN), originating from Europe, while BS 970 (Part 1) 708A37 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, EN 10083-1 50CrMo4 vs BS 970 (Part 1) 708A37 is a 78.9% 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 78.9%.

Frequently Compared With EN 10083-1 50CrMo4:
IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 103Cr6 NF A35-565 100C6 IS 11169 (Part 1) 10Ni5Cr4 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 4) 10Mo6 UNI 11234 100Cr6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 7) 10Cr36Mo10H IS 1570 (Part 7) 10Mo6H
Match Breakdown
CHEMISTRY MATCH
78.9%
MECHANICAL MATCH
No shared data
OVERALL
78.9%
Specifications
Property EN 10083-1 50CrMo4 BS 970 (Part 1) 708A37
Standard EN 10083-1:1991 BS 970 (Part 1):1983
Category Alloy Steel Alloy Steel
C (%) 0.46-0.54 0.35-0.40
Cr (%) 0.90-1.20 0.90-1.20
Mn (%) 0.50-0.80 0.70-0.90
Mo (%) 0.15-0.30 0.15-0.25
P (%) <=0.035 <=0.035
S (%) <=0.035 <=0.040
Si (%) <=0.40 Not specified
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property EN 10083-1 50CrMo4 BS 970 (Part 1) 708A37
Condition Quenched and tempered, ruling section d <= 16 mm Not specified
Elongation 9% min Not specified
Hardness Soft annealed: 248 HB max Not specified
Tensile Strength 1100 to 1300 MPa Not specified
Yield Strength 900 MPa min Not specified
Typical Applications
EN 10083-1 50CrMo4
Quenched and tempered machine parts; non alloy steels also normalized (clause 1)
BS 970 (Part 1) 708A37
Used for gears, shafts, studs, machine spindles, crankshafts, and automotive components.
Key Differences
Can EN 10083-1 50CrMo4 Be Substituted With BS 970 (Part 1) 708A37?
EN 10083-1 50CrMo4 and BS 970 (Part 1) 708A37 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 10083-1 50CrMo4
No active listings currently.
BS 970 (Part 1) 708A37
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 6700–7000 mm (263.78–275.59 in)
On M-EX Right Now
EN 10083-1 50CrMo4
0 active listings and RFQs →
BS 970 (Part 1) 708A37
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between EN 10083-1 50CrMo4 and BS 970 (Part 1) 708A37?
EN 10083-1 50CrMo4 specifies Si which is not specified for BS 970 (Part 1) 708A37.
Can EN 10083-1 50CrMo4 be substituted with BS 970 (Part 1) 708A37?
EN 10083-1 50CrMo4 and BS 970 (Part 1) 708A37 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.