Spring Steel Strip

 

Looking for small quantities of spring steel strip?

Call BSS Steelstrip on 01709 820070, we can help

or visit our  website

  
High Carbon Steel Strip

SpSpring steel is a low alloy, medium carbon steel with a very high yield strength. This allows objects made of spring steel to return to their original shape despite significant bending or twisting.

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Spring steel applications

  • Band saw blades for wood working
  • Hand Saw, Cross cut saw for wood cutting
  • Flat springs for automobile clutch plates
  • Doctor blades for paper industry
  • Shims and washers for automotive industries
  • Circular saw blanks
  • Engineering industry
  • Masonry and agricultural tools
  • Industrial knives
  • Stone cutting
  • Springs

 

 

 
A spring is a flexible elastic object used to store mechanical energy. Springs are usually made out of hardened steel. Small springs can be produced from pre-hardened (hardened and tempered) stock, while larger ones are made from annealed steel and hardened after fabrication. Spring Steel Strip is quite literally, steel used in the production of springs. This range of steels normally contains between 0.40% and 0.80% carbon, with alloying elements added for the higher integrity products such as automotive clutches etc. Coil springs are normally produced from steel wire, whilst steel strip is used for the production of flat springs. Spring steels are also used in a number of applications where hardness or resistance to bending is required, such as lock parts or tools.

Spring steels are supplied either in the annealed condition for forming and blanking, or in the ready hardened, more commonly referred to as hardened and tempered. Steel supplied in the annealed condition is usually hardened after the stamping and forming operation in component form. The choice of supply condition is determined by the component production method, as ready hardened steel is difficult to process. Hardened and tempered strip is more suitable for flat components or where the production is primarily laser cutting or plain blanking. Hardening in component form is usually however more expensive than the premium paid for ready hardened steel. The hardening and heat treatment of steel is a complex area of metallurgy and beyond the scope of this site, but links for further reference can be located on the right side of the page.


At BSS Steelstrip, we stock the following grades, which can be supplied from .stock in small quantities:-

Carbon Spring Steels- CS70, CS80, CS95, CS100, 75CR1, EN8, EN9- Euronorm C67S, C75S, C85S, C95S and C100S

Stainless Spring Steels- Type 420 Type 4301                        Telephone Steve on 01709 820070


We will add more commonly used spring steels in due course. Please check back at a later date.

The analyses are given for guidance only as the various international standards are not identical, in addition many steelmakers restrict analyses, particularly carbon.

 

Common Spring Steel Grades Equivalents

Euronorm

Germany

UK

USA

EN 10132 - 4

DIN 17222

BS 1449

SAE

%C

%Mn

%Si

%S

%P

%Al

%Cr

%V

C50E

CK 45

.45-.55

.50-.90

.05-.35

.040 max

.045 max

C50E

CK 50

CS50

1050

.45-.55

.50-.90

.05-.35

.040 max

.045 max

-

-

-

CK 55

1055

.50-0.60

C67S

CK67/C67

CS70

1070

.68 - .73

.60 - .85

.15 - .25

.01 max

.02 max

-

.20 - .30

-

C75S

CK75/C75

CS70

1074

.70 - .75

.60 - .80

.15 - .30

.025 max

.025 max

.02 - .05

.20 - .30

-

 

75Cr1

75Cr1

.74-0.80

.65 - 0.80

.25 0.40

.010 max

.025 max

0.30-0.45

C85S

CK85

CS80

1084

.80 - .90

.40 - .70

.15 - .35

.025 max

.025 max

-

.40 max

-

50CrV4

50CV4

735A50

6150

.47-0.55

.70-1.10

.15-0.40

.035 max

.035 max

-

-

.10-.20

CK101

CS95

1095

.90-1.00

.30-.60

.05-.35

.025 max

.025 max

More detail on Euronorm EN10132 including mechanical properties can be found here

USA  AISI and SAE Spring Steels

Grade

% C

% Mng

% P

% S

1050

.47 - .55

.60 - .90

0.04

0.05

1055

.52 - .60

.60 - .90

0.04

0.05

1060

.55 - .66

.60 - .90

0.04

0.05

1065

.59 - .70

.60 - .90

0.04

0.05

1070

.65 - .76

.60 - .90

0.04

0.05

1074

.69 - .80

.50 - .80

0.04

0.05

1080

.74 - .88

.60 - .90

0.04

0.05

1085

.80 - .94

.70 - 1.00

0.04

0.05

1095

.90 - 1.04

.30 - .50

0.04

0.05

 

Due to numerous requests below I have added some of the older spring steel grades which are often quoted

Old BS970 spring steels

Euronorm

Germany

UK

USA

BS970

%C

%Mn

%Si

%S

%P

%Al

%Cr

%V

En8

0.35-0.45

0.60-1.00

0.05-0.35

0.06max

0.06max

En8a

0.33-0.38

0.70-0.90

0.05-0.35

0.06max

0.06max

-

-

En9

0.50-0.60

0.50-0.90

0.05-0.35

0.06max

0.06max

En 42

0.70-0.85

0.55-0.75

0.10-0.40

0.06max

0.06max

-

Suppliers of Cold Rolled Spring Steel Strip UK

     
BSS Steelstrip Tel 01709 820070 Fax 08701 236052
Ben Bennett Jnr. Tel 01709 382 006 Fax 01709 829890
Reddifast Tel 01384 636 663 Fax 01384 633 323
Webster and Horsfall Tel 0121 7729797 Fax 0121 766 5816
     
     
A more completer list of suppliers can be found on the following pages
Cold rolled strip manufacturers USA
Cold Rolled Strip Manufacturers UK
Cold Rolled Strip Manufactures Europe
Cold Rolled Strip Manufacturers - rest of the World
 
More Spring Steel Links
  1. Spring Steel UK
  2. BSS Steel Strip
  3. Spring Steel Qualities
  4. Stainless Spring Steels
  5. EN10132

 

Standard Specific Links

 

 
 
Spring Industry Links

UKSMA
UK Spring Manufacturers Association

SMI
Spring Manufacturers Institute

 
 

 

Disclaimer

Every effort is made to ensure that technical specifications are accurate. However, technical specifications included herein should be used as a guideline only. All specifications are subject to change without notice.